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MAX8982XEWO+T
Power-Management ICs for ICERA E400 Platform
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
EVALUATION KIT AVAILABLE+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel. These devices have a minimum order inc-
rement of 1k pieces.
General Description
The MAX8982A/MAX8982P/MAX8982X are complete
power-management ICs for the latest LTE/WCDMA/GSM/
GPRS/EDGE data card based on the new ICERA platform
(E400). The MAX8982A operates from a 4.1V to 5.5V
supply and contains four efficient step-down converters,
nine low dropout linear regulators (LDOs) to power all
RF and baseband circuitry, three current regulators with
programmable current up to 24mA and embedded flash
timers, and an I2C serial interface to program individual
regulator output voltages as well as on/off control for flex-
ibility. The linear regulators provide greater than 60dB
PSRR, less than 45FV of output noise, and minimal cross
coupling noise between LDOs.
The MAX8982X/MAX8982P operates from a 2.9V to 5.5V
supply. The MAX8982X has the same features as the
MAX8982A, except it does not have BUCK3, BUCK4,
and LDO8. The MAX8982P has the same features as the
MAX8982A.
All buck converters and LDOs are enabled/disabled by
either I2C or PWR_REQ control signal after power-up.
This feature provides more flexibility in system design.
Applications
GSM, GPRS, EDGE, WCDMA, and LTE
Data Card with New ICERA Platform (E400)
Features
S 4 High-Efficiency Buck Converters
0.9V at 1.2A (1.3 for MAX8982P) for CORE with
DVS Function (0.6V
to 1.2V in 25mV Steps) and Slew Rate Control
1.8V at 600mA for System IO
3.2V at 600mA for All LDO Inputs (2.9V to 3.65V
in 50mV Steps) (MAX8982A/MAX8982P Only)
3.4V at 1.8A for GSM/WCDMA PA (3.0V to 3.75V
in 50mV Steps) (MAX8982A/MAX8982P Only)
S 9 LDO Linear Regulators
2.7V at 300mA on LDO1 for RF Transceiver
1.8V at 150mA on LDO2 for RF Transceiver
2.8V at 150mA on LDO3 for Analogue BB
0.9V at 50mA on LDO4 for BB PLL with the
Separate Input for a Higher Efficiency
3.0V at 150mA on LDO5 for SD Card
2.7V at 150mA on LDO6 for TCXO
1.8V or 3.0V at 150mA on LDO7 for SIM
3.0V at 150mA on LDO8 for USB with the
Separate Input (MAX8982A/MAX8982P Only)
0.9V at 50mA on LDO9 for BB with the Separate
Input for a Higher Efficiency
S 32 Programmable Voltage Options and External
Input on BUCK1 (0.9V Default) for DVS
S 16 Programmable Voltage Options for BUCK3
(MAX8982A/MAX8982P Only)
S 16 Programmable Voltage Options on BUCK4
(MAX8982A/MAX8982P Only)
S Programmable Voltage Options for All LDOs
(LDO8 for MAX8982A/MAX8982P Only)
S BUCK2, BUCK3 (MAX8982A/MAX8982P Only),
LDO3, and Internal 32kHz Clock Default On at
Initial Startup
S All Buck Converters and LDOs are Enabled by
Either I2C or Power Request Control (PWR_REQ)
After Power-Up
S 3 Current Regulators with 8 Dimming Current
Options Up to 24mA with Embedded Flash Timer
Ordering Information
PARTTEMP RANGEPIN-PACKAGE
MAX8982AEWO+T-40°C to +85°C42 WLP
MAX8982PEWO+T-40°C to +85°C42 WLP
MAX8982XEWO+T-40°C to +85°C42 WLP
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
TABLE OF CONTENTS
General Description ............................................................................1
Applications ..................................................................................1
Features .....................................................................................1
Ordering Information ...........................................................................1
Absolute Maximum Ratings ......................................................................7
Package Thermal Characteristics..................................................................7
General Electrical Characteristics .................................................................7
Buck1 Electrical Characteristics...................................................................9
Buck2 Electrical Characteristics..................................................................10
Buck3 Electrical Characteristics..................................................................10
Buck4 Electrical Characteristics..................................................................11
OUT1 (LDO1) Electrical Characteristics............................................................12
OUT2 (LDO2) Electrical Characteristics............................................................12
OUT3 (LDO3) Electrical Characteristics............................................................13
OUT4 (LDO4) Electrical Characteristics............................................................14
OUT5 (LDO5) Electrical Characteristics............................................................14
OUT6 (LDO6) Electrical Characteristics............................................................15
VSIM (LDO7) Electrical Characteristics ............................................................15
OUT8 (LDO8) Electrical Characteristics............................................................16
OUT9 (LDO9) Electrical Characteristics............................................................16
RESET Electrical Characteristics................................................................17
IRQ Electrical Characteristics...................................................................17
Current Regulator Electrical Characteristics.........................................................17
Flash Timer Electrical Characteristics .............................................................18
N32kHz Electrical Characteristics ................................................................19
Typical Operating Characteristics ................................................................19
Pin Configurations ............................................................................25
Pin Description...............................................................................27
Detailed Description...........................................................................34
Power-On/Off Control ........................................................................34
PWR_REQ ..............................................................................34
Active Discharge............................................................................35
BUCK1, BUCK2, and BUCK3
Step-Down Converters .......................................................................37
Setting the Output Voltage on BUCK1 ...........................................................37
Dynamic Voltage Scaling (DVS)
Function on Buck 1..........................................................................37
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
TABLE OF CONTENTS (CONTINUED)
Ramp-Up/Down Slope Control on BUCK1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Setting the Output Voltage on BUCK2 ...........................................................38
Setting the Output Voltage on BUCK3 ...........................................................38
BUCK4 Step-Down Converter
for PA (Power Amplifier) ......................................................................38
Setting the Output Voltage on BUCK4 ...........................................................38
Linear Regulators ...........................................................................38
Reference Bypass (REFBP) ...................................................................38
Thermal Overload Protection...................................................................38
Undervoltage Lockout (UVLO) .................................................................38
Overvoltage Protection (OVP)..................................................................38
Power-On Reset (POR).......................................................................38
Current Regulators (DR1, DR2, DR3) ............................................................39
Embedded Flash Timer.......................................................................39
IRQ Description.............................................................................39
RESET SIGNAL to B/B Chipset.................................................................40
I2C Serial Interface ..........................................................................40
Bit Transfer..............................................................................40
START and STOP Conditions................................................................40
System Configuration......................................................................41
Acknowledge............................................................................41
Slave Address ...........................................................................42
Write Operations..........................................................................42
Read Operations .........................................................................43
Applications Information........................................................................69
Inductor Selection...........................................................................69
Output Capacitor Selection....................................................................71
Input Capacitor Selection .....................................................................71
PCB Layout Guidelines.......................................................................71
Package Information...........................................................................71
Chip Information..............................................................................71
Revision History ..............................................................................72
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
LIST OF FIGURES
LIST OF TABLES
Figure 1. MAX8982A/MAX8982P Typical Application Circuit and Functional Block Diagram ..................31
Figure 2. MAX8982X Typical Application Circuit and Functional Block Diagram ............................33
Figure 3. Power-On/Off State Diagram with IN3 Connected to BUCK2 Output and IN4 Connected to IN1_.
Default PWR_REQ Regulators Are Shown...................................................35
Figure 4. MAX8982_ Power-On Timing Diagram at Initial Startup with EN Connected to IN1_.
BUCK3 and OUT8 Are for the MAX8982A/MAX8982P Only.....................................36
Figure 5. MAX8982_ Power-On Timing Diagram in PWR_REQ ON Mode After Power-Up ....................37
Figure 6. Frequency Variation vs. Load Current with a 5V Input Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 7. DVS1 Logic Diagram...................................................................37
Figure 8. BUCK1 Ramp-Up/Down Slope Control.....................................................38
Figure 9. POR State Diagram....................................................................39
Figure 10. Adding Series Resistors to Adjust LED Current .............................................39
Figure 11. Flash Timing Diagram .................................................................39
Figure 12. I2C Bit Transfer ......................................................................40
Figure 13. START and STOP Conditions ...........................................................40
Figure 14. Master/Slave Configuration .............................................................41
Figure 15. I2C Acknowledge ....................................................................41
Figure 16. I2C Timing Diagram...................................................................42
Figure 17. Writing to the ICs.....................................................................42
Figure 18. Reading from the ICs .................................................................43
Table 1. Summary of Power Supplies..............................................................29
Table 2. External Component List for Figure 1.......................................................32
Table 3. External Component List for Figure 2.......................................................34
Truth Table ..................................................................................37
Table 4. BUCK1 Ramp-Up/Down Slope Control Settings ..............................................38
Table 5. Register Map .........................................................................44
Table 6. CHIPID Register.......................................................................45
Table 7. IRQM Register (Interrupt Mask) ...........................................................45
Table 8. IRQ Register..........................................................................46
Table 9. STATUS Register ......................................................................46
Table 10. LED1FT1 Register (LED1 (DR1) Flash Timer On/Off and TON Adjust) ............................46
Table 11. LED1FT2 Register (LED1 (DR1) Flash Timer t1 Setting)........................................47
Table 12. LED1FT3 Register (LED1 (DR1) Flash Timer t2 Setting) .......................................47
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
LIST OF TABLES (CONTINUED)
Table 13. LED1FT4 Register (LED1 (DR1) Flash Timer t3 Setting)........................................47
Table 14. LED1FT5 Register (LED1 (DR1) Flash Timer t4 Setting)........................................48
Table 15. LED1FT6 Register (LED1 (DR1) Flash Timer tP Setting) .......................................48
Table 16. LED2FT1 Register (LED2 (DR2) Flash Timer On/Off and tON Adjust) ............................48
Table 17. LED2FT2 Register (LED2 (DR2) Flash Timer t1 Setting) .......................................49
Table 18. LED2FT3 Register (LED2 (DR2) Flash Timer t2 Setting) .......................................49
Table 19. LED2FT4 Register (LED2 (DR2) Flash Timer t3 Setting) .......................................49
Table 20. LED2FT5 Register (LED2 (DR2) Flash Timer t4 Setting) .......................................50
Table 21. LED2FT6 Register (LED2 (DR2) Flash Timer tP Setting) .......................................50
Table 22. LED3FT1 Register (LED3 (DR3) Flash Timer On/Off and tON Adjust) ............................50
Table 23. LED3FT2 Register (LED3 (DR3) Flash Timer t1 Setting........................................51
Table 24. LED3FT3 Register (LED3 (DR3) Flash Timer t2 Setting) .......................................51
Table 25. LED3FT4 Register (LED3 (DR3) Flash Timer t3 Setting) .......................................51
Table 26. LED3FT5 Register (LED3 (DR3) Flash Timer t4 Setting) .......................................52
Table 27. LED3FT6 Register (LED3 (DR3) Flash Timer tP Setting) .......................................52
Table 28. BUCK1 Register (On/Off Control for BUCK1)................................................52
Table 29. BUCK1DVS1 Register (Output Voltage Setting for BUCK1 (DVS1 = Low)) .........................53
Table 30. BUCK1DVS2 Register (Output Voltage Setting for BUCK1 (DVS1 = High)).........................54
Table 31. BUCK2 Register (On/Off Control for BUCK2) ...............................................55
Table 32. LDO1 Register (On/Off Control for LDO1) ..................................................55
Table 33. LDO1V Register (Output Voltage Setting for OUT1)...........................................55
Table 34. LDO2 Register (ON/OFF Control for LDO2).................................................56
Table 35. LDO2V Register (Output Voltage Setting for OUT2) ..........................................56
Table 36. LDO3 Register (On/Off Control for LDO3)..................................................56
Table 37. LDO3V Register (Output Voltage Setting for OUT3)...........................................57
Table 38. LDO4 Register (On/Off Control for LDO4)..................................................57
Table 39. LDO4V Register (Output Voltage Setting for OUT4)...........................................58
Table 40. LDO5 Register (On/Off Control for LDO5)..................................................58
Table 41. LDO5V Register (Output Voltage Setting for OUT5)...........................................59
Table 42. LDO6 Register (On/Off Control for LDO6)..................................................59
Table 43. LDO6V Register (Output Voltage Setting for OUT6) ..........................................60
Table 44. VSIM Register (On/Off Control for VSIM (LDO7)).............................................60
Table 45. VSIMV Register (Output Voltage Setting for VSIM) ...........................................61
Table 46. LDO8 Register (On/Off Control for LDO8)..................................................61
Table 47. LDO8V Register (Output Voltage Setting for OUT8)...........................................62
Table 48. LDO9 Register (On/Off Control for LDO9)..................................................62
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
LIST OF TABLES (CONTINUED)
Table 49. LDO9V Register (Output Voltage Setting for OUT9) ..........................................63
Table 50. LED_EN Register (On/Off Control for 3 Current Regulators) ....................................63
Table 51. On/Off Register (On/Off Control for BUCK3, BUCK4, and the Internal 32kHz Clock).................64
Table 52. BUCK3 Register (Output Voltage Setting for BUCK3).........................................64
Table 53. BUCK4 Register (Output Voltage Setting for BUCK4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 54. CURRENTREG1 Register (Current Setting for Current Regulators DR1 and DR2) ...................66
Table 55. CURRENTREG2 Register (Current Setting for Current Regulator DR3)............................66
Table 56. RAMP Register (Slope Setting for BUCK1) .................................................67
Table 57. BUCK1-4ADIS Register (Active Discharge Settings for BUCK1–BUCK4) ..........................67
Table 58. LDO1-8ADIS Register (Active Discharge Settings for LDO1–LDO8)..............................68
Table 59. LDO9ADIS Register (Active Discharge Setting for LDO9)......................................68
Table 60. Recommended Inductors...............................................................69
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
VDDA, VDDB, IN4, IN1A, IN1B to GND ....................-0.3V to +6V
REFBP, BUCK1, BUCK2, BUCK3, BUCK4,
EN to GND ...............................-0.3V to (VIN1A, VIN1B + 0.3V)
SDA, SCL, PWR_REQ, DVS1, IRQ, RESET, IN3,
N32kHz to GND ..............................-0.3V to (VBUCK2 + 0.3V)
OUT1, OUT2 to GND .............................-0.3V to (VDDA + 0.3V)
OUT3, OUT5, OUT6, VSIM to GND .......-0.3V to (VDDB + 0.3V)
OUT8 to GND ...........................................-0.3V to (VIN4 + 0.3V)
OUT4, OUT9 to GND ...............................-0.3V to (VIN3 + 0.3V)
PGND1, PGND2, PGND3, PGND4 to GND .........-0.3V to +0.3V
DR1, DR2, DR3 to GND ..........................-0.3V to (VIN1_ + 0.3V)
LX1 Continuous Current (Note 1) ...................................1200mA
LX2, LX3 Continuous Current (Note 1) ............................600mA
LX4 Continuous Current (Note 1) ...................................1800mA
Continuous Power Dissipation (TA = +70NC)
7 x 6 42-Bump WLP, 0.5mm Pitch, 3.75mm x 3.20mm
(derate 27.8mW/NC above +70NC) ................................2.22W
Operating Temperature Range ..........................-40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range ............................-65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
GENERAL ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5.0V and COUT1,2,3+CIN_ = 1000FF, MAX8982X: VIN1A = VIN1B = +3.3V and
COUT1,2,3+CIN_ = 20FF, CREFBP = 0.1FF, TA = -40NC to +85NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 3)
ABSOLUTE MAXIMUM RATINGS
Note 1: LX1–LX4 have internal clamp diodes to PGND_, IN1A, and IN1B. Applications that forward bias this diode should take
care not to exceed the power dissipation limits of the device.
WLP
Junction-to-Ambient Thermal Resistance (qJA) ..........36°C/W
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
PACKAGE THERMAL CHARACTERISTICS(Note 2)
PARAMETERCONDITIONSMINTYPMAXUNITS
IN1A, IN1B, IN4 ESD ProtectionModule level ESD protection, in-circuit tested with 0.1FF
ceramic capacitorQ10kV
Shutdown Supply Current (Note 4)EN = GND10FA
No Load Supply Current
MAX8982A/MAX8982P, VEN = VIN1_, BUCK3 and OUT3
on (default output), all other regulators off300
MAX8982X, VEN = VIN1_, OUT3 on (default output), all
other regulators off300
MAX8982A/MAX8982P, VEN = VIN1_, BUCK1 on (default
output), BUCK2 on (default output), BUCK3 on (default
output), all LDOs (except LDO8) default output on
MAX8982X, VEN = VIN1_, BUCK1 on (default output),
BUCK2 on (default output), all LDOs (except LDO8)
default output on
Loaded Supply Current
MAX8982A/MAX8982P, VEN = VIN1_, 32kHz clock on,
BUCK2 on (default output) with 200FA load, BUCK3
on (default output), OUT3 on (default output) with 20FA
load, OUT2 on (default output) with 100FA load, VVSIM
= 3.0V with 50FA load, OUT8 on (default output) with
100FA load
MAX8982X, VEN = VIN1_, 32kHz clock on, BUCK2 on
(default output) with 200FA load, OUT3 on (default
output) with 20FA load, OUT2 on (default output) with
1000
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
GENERAL ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5.0V and COUT1,2,3+CIN_ = 1000FF, MAX8982X: VIN1A = VIN1B = +3.3V and
COUT1,2,3+CIN_ = 20FF, CREFBP = 0.1FF, TA = -40NC to +85NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
OPERATING VOLTAGE
IN1A, IN1B Operating VoltageMAX8982A4.15.5VMAX8982X/MAX8982P2.95.5
Undervoltage Lockout
MAX8982A, VIN1_ rising 3.53.84.1MAX8982A, VIN1_ falling3.5
MAX8982X/MAX8982P, VIN1_ rising 2.52.72.9
MAX8982X/MAX8982P, VIN1_ falling2.4
OVERVOLTAGE LOCKOUT (OVP)
Overvoltage Lockout
(Shutdown All Outputs Including
LDO7)
VIN1_ rising5.755.93V
IN1A, IN1B Overvoltage
Hysteresis250mV
THERMAL SHUTDOWN
ThresholdTJ rising160NC
Hysteresis10NC
HOT TEMPERATURE DETECTION
ThresholdInterrupt enabled, TJ rising, typical hysteresis = +10NC+125NC
REFERENCE
REFBP Output Voltage0 P IREFBP P 1FA 0.7880.800.812V
Supply Rejection4.1V P VIN1_ P 5.5V 0.2mV
LOGIC AND CONTROL INPUTS (SDA, SCL, EN, DVS1, PWR_REQ)
Input Low Level TA = +25NC0.3V
Input High Level TA = +25NC1.2V
Logic Input Current0V < VIN1_ < 5.5V, TA = +25NC-1+1FA0V < VIN1_ < 5.5V, TA = +85NC0.1
LOGIC AND CONTROL OUTPUTS
SDA Output Low Level ISDA = 6mA0.4V
I2C INTERFACE (VSCL = VSDA = 1.8V, Note 2, Figure 16)
Clock Frequency400kHz
Bus Free Time Between START
and STOP (tBUF)1.3Fs
Hold Time Repeated START
Condition (tHD_STA)0.6Fs
SCL Low Period (tLOW)1.3Fs
SCL High Period (tHIGH)0.6Fs
Setup Time Repeated START
Condition (tSU_STA)0.6Fs
SDA Hold Time (tHD_DAT)0Fs
SDA Setup Time (tSU_DAT)100ns
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
GENERAL ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5.0V and COUT1,2,3+CIN_ = 1000FF, MAX8982X: VIN1A = VIN1B = +3.3V and
COUT1,2,3+CIN_ = 20FF, CREFBP = 0.1FF, TA = -40NC to +85NC. Typical values are at TA = +25NC, unless otherwise noted.) (Note 3)
BUCK1 ELECTRICAL CHARACTERISTICS
(MAX8982AMAX8982P: VIN1A = VIN1B = +5.0V and COUT1,2,3+CIN_ = 1000µF, MAX8982X: VIN1A = VIN1B = +3.3V and COUT1,2,3+CIN_
= 20µF, CREFBP = 0.1µF, COUT = 10µF, L = 2.2µH, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.)
(Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
Maximum Pulse Width of Spikes
that Must be Suppressed by the
Input Filter of Both SDA and SCL
Signalsns
Setup Time for STOP Condition
(tSU_STO)0.6Fs
PARAMETERCONDITIONSMINTYPMAXUNITS
Supply Current (Note 4)No load, no switching 65FA
Default Output VoltageILOAD = 100mA0.8730.90.927V
Output Voltage AccuracyILOAD = 100mA, VBUCK1 tested at 0.6V, 0.775V, 1V,
1.2V in production (0.6V to 1.2V in 25mV steps)-3+3%
Maximum Output Current VBUCK1 = 0.9V, TA =
+25NC
MAX8982A/MAX8982X1200mAMAX8982P1300
Current Limit
pFET switch (MAX8982A/MAX8982X)140018002500pFET switch (MAX8982P)150019002600
nFET rectifier (MAX8982A/MAX8982X)100014001900
nFET rectifier (MAX8982P)110015002000
On-ResistancepFET switch, ILX1 = -150mA0.3InFET rectifier, ILX1 = 150mA0.15
Ramp-Up/Down Rate Control Same for both up and down
RASD1[0:1] = 005
mV/
RASD1[0:1] = 0110
RASD1[0:1] = 1012.5
(default)
RASD1[0:1] = 1125
Rectifier Off Current Threshold40mA
Minimum On-TimetON40ns
Minimum Off-TimetOFF40ns
Efficiency (Note 4)VBUCK1 = 0.9V, ILOAD = 400mA85%
Shutdown Output Resistance
(Active Discharge Resistance)I2C programmable, default OFF1kI
Output Load RegulationEqual to inductor DC resistance divided by 4RL/4V/A
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
BUCK2 ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5.0V and COUT1,2,3+CIN_ = 1000FF, MAX8982X: VIN1A = VIN1B = +3.3V and
COUT1,2,3+CIN_ = 20FF, CREFBP = 0.1FF, COUT = 2.2FF, L = 1FH, TA = -40NC to +85NC, unless otherwise noted. Typical values are
at TA = +25NC.) (Note 3)
BUCK3 ELECTRICAL CHARACTERISTICS
(MAX8982A/MX8982P only, VIN1A = VIN1B = +5.0V, COUT1,2,3+CIN_ = 1000FF, CREFBP = 0.1FF, COUT = 2.2FF, L = 2.2FH, TA =
-40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
Supply Current (Note 4)No load, no switching 26FA
Output VoltageILOAD = 100mA1.7461.81.854V
Output Current VBUCK2 = 1.8V, TA = +25NC600mA
Current LimitpFET switch70011001500mAnFET rectifier5007501200
On-ResistancepFET switch, ILX2 = -150mA0.65InFET rectifier, ILX2 = 150mA0.3
Rectifier Off Current Threshold40mA
Minimum On-TimetON70ns
Minimum Off-TimetOFF70ns
Efficiency (Note 4)VBUCK2 = 1.8V, ILOAD = 250mA85%
Shutdown Output Resistance
(Active Discharge Resistance)I2C programmable, default ON100I
Output Load RegulationEqual to inductor DC resistance divided by 4RL/4V/A
PARAMETERCONDITIONSMINTYPMAXUNITS
Supply Current (Note 4)No load, no switching40FA
Default Output Voltage ILOAD = 100mA3.103.23.29V
Programmable Output VoltageILOAD = 100mA,
programmable output voltage step = 50mV
Maximum Output Current VBUCK3 = 3.2V, TA = +25NC600mA
Efficiency (Note 4)VBUCK3 = 3.2V, ILOAD = 300mA90%
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
BUCK3 ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982P only, VIN1A = VIN1B = +5.0V, COUT1,2,3+CIN_ = 1000FF, CREFBP = 0.1FF, COUT = 2.2FF, L = 2.2FH, TA =
-40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
BUCK4 ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P only, VIN1A = VIN1B = +5.0V, COUT1,2,3+CIN_ = 1000FF, CREFBP = 0.1FF, COUT = 20FF, L = 1FH, TA = -40NC
to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONSMINTYPMAXUNITS
Current LimitpFET switch70011001500mAnFET rectifier5007501200
On-ResistancepFET switch, ILX3 = -150mA0.65InFET rectifier, ILX3 = 150mA0.3
Rectifier Off Current Threshold80mA
Minimum On-TimetON70ns
Minimum Off-TimetOFF70ns
Shutdown Output Resistance
(Active Discharge Resistance)I2C programmable, default off1kI
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output Voltage ILOAD = 100mA3.2983.403.502V
Programmable Output VoltageILOAD = 100mA,
programmable output voltage step = 50mV
Efficiency (Note 4)VBUCK4 = 3.4V, ILOAD = 500mA90%
Maximum Output Current1800mA
p-Channel On-ResistanceILX4 = 150mA 100mI
n-Channel On-ResistanceILX4 = 150mA 100mI
p-Channel Current-Limit Threshold2700mA
n-Channel Negative Current Limit1500mA
Maximum Duty Cycle100%
Minimum Duty Cycle16.5%
PWM FrequencyfOSC1.82.02.2MHz
Shutdown Output Resistance
I2C programmable,1kI
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT1 (LDO1) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDA = +3.2V and CVDD_ = 10FF, MAX8982X: VDDA = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT1 = 4.7FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
OUT2 (LDO2) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDA = +3.2V and CVDD_ = 10FF, MAX8982X: VDDA = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT2 = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output VoltageILOAD = 50mA 2.6192.702.781V
Maximum Output Current300mA
Current Limit (Note 4)VOUT1 = 90% of its regulation310550940mA
Dropout Voltage (Note 4)ILOAD = 200mA, TA = +85NC50100mV
Line Regulation2.9V P VDDA P 3.65V, ILOAD = 150mA2.4mV
Load Regulation1mA < ILOAD < 300mA12mV
Transient Responsedi/dt = IMAX/0.1Fs, 1kHz < 1/T < 0.5MHz, where T is the
period of step load, 1mA to 300mA 50mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage 100Hz to 100kHz, ILOAD = 30mA45FVRMS
Programmable Output VoltagesILOAD = 50mA
Startup Time from Shutdown
(Note 4)ILOAD = 300mA40100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 300mA350mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output Voltage ILOAD = 50mA 1.7461.801.854V
Maximum Output Current150mA
Current Limit (Note 4)VOUT2 = 90% of its nominal regulation voltage165360650mA
Dropout Voltage (Note 4)ILOAD = 100mA, TA =+85NC150300mV
Line Regulation2.9V P VDDA P 3.65V, ILOAD = 100mA2.4mV
Load Regulation50FA < ILOAD < 150mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 30mA45FVRMS
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT2 (LDO2) ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982P: VDDA = +3.2V and CVDD_ = 10FF, MAX8982X: VDDA = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT2 = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
OUT3 (LDO3) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDB = +3.2V and CVDD_ = 10FF, MAX8982X: VDDB = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT3 = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Programmable Output VoltagesILOAD = 50mA
Startup Time from Shutdown
(Note 4)ILOAD = 150mA40100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 150mA350mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output VoltageILOAD = 50mA2.7162.8002.884V
Maximum Output Current150mA
Current Limit (Note 4)VOUT3 = 90% of its regulation165360650mA
Dropout VoltageILOAD = 100mA, TA = +85NC150300mV
Line Regulation3.2V P VDDB P 3.65V, ILOAD = 100mA2.4mV
Load Regulation50FA < ILOAD < 150mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 30mA45FVRMS
Programmable Output VoltageILOAD = 50mA
Startup Time from Shutdown
(Note 4)ILOAD = 150mA100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 150mA50mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT4 (LDO4) ELECTRICAL CHARACTERISTICS
(MAX8982_: VIN3 = VBUCK2 = 1.8V, CIN3 = 2.2FF, CREFBP = 0.1FF, COUT4 = 2.2FF, TA = -40NC to +85NC, unless otherwise noted.
Typical values are at TA = +25NC.) (Note 3)
OUT5 (LDO5) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDB = +3.2V and CVDD_ = 10FF, MAX8982X: VDDB = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT5 = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output VoltageILOAD = 10mA 0.8730.90.927V
Maximum Output Current50mA
Current Limit (Note 4)VOUT4 = 90% of its regulation55120220mA
Load Regulation50FA < ILOAD < 10mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 10mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 10mA45FVRMS
Programmable Output VoltageILOAD = 10mA
Startup Time from Shutdown
(Note 4)ILOAD = 50mA 100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 50mA 50mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output Voltage ILOAD = 50mA2.913.003.09V
Maximum Output Current150mA
Current Limit (Note 4)VOUT5 = 90% of its regulation165360650mA
Dropout Voltage (Note 4)ILOAD = 100mA, TA = +85NC150300mV
Line Regulation3.2V P VDDB P 3.65V, ILOAD = 100mA2.4mV
Load Regulation50FA < ILOAD < 150mA, VOUT = 2.8V25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 30mA45FVRMS
Programmable Output VoltageILOAD = 50mA, VDDB = 3.4V for VOUT = 3.2V
Startup Time from Shutdown
(Note 4)ILOAD = 150mA100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 150mA50mV
Shutdown Output Impedance
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT6 (LDO6) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDB = +3.2V and CVDD_ = 10FF, MAX8982X: VDDB = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT6 = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
VSIM (LDO7) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDDB = +3.2V and CVDD_ = 10FF, MAX8982X: VDDB = +3.3V and CVDD_ = 20FF, CREFBP = 0.1FF, COUT = 1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output VoltageILOAD = 50mA2.6192.702.781V
Maximum Output Current150mA
Current Limit (Note 4)VOUT6 = 90% of its regulation 165360650mA
Dropout Voltage (Note 4)ILOAD = 100mA, TA = +85NC150300mV
Line Regulation2.90V P VDDB P 3.65V, ILOAD = 100mA2.2mV
Load Regulation50FA < ILOAD < 150mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 30mA45FVRMS
Programmable Output VoltageILOAD = 50mA
Startup Time from Shutdown
(Note 4)ILOAD = 150mA100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 150mA50mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Output Voltage 50FA < ILOAD < 20mA, 1.8V mode 1.7461.801.854V50FA < ILOAD < 20mA, 3.0V mode (default)2.913.003.09
Maximum Output Current2.9V P VDDB P 3.65V, 1.8V mode150mA
Current Limit (Note 4)VVSIM = 90% of 1.8V mode165360650mA
Dropout Voltage (Note 4)ILOAD = 20mA, 3V mode120200mV
Line Regulation2.9V P VDDB P 3.65V, ILOAD = 50FA (1.8V mode)0.1mV
Load Regulation50FA < ILOAD < 20mA (1.8V mode)25mV
Power-Supply Rejectionf = 10kHz, ILOAD = 10mA57dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 10mA80FV
VSIM Discharge Resistance
(Active Discharge Resistance)I2C programmable, default off100I
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT8 (LDO8) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P only, VIN4 = VIN1_ = +5.0V, CIN4 = 1.0FF, CREFBP = 0.1FF, COUT8 = 1FF, TA = -40NC to +85NC, unless
otherwise noted. Typical values are at TA = +25NC.) (Note 3)
OUT9 (LDO9) ELECTRICAL CHARACTERISTICS
(MAX8982_: VIN3 = VBUCK2 = 1.8V, CIN3 = 2.2FF, CREFBP = 0.1FF, COUT9 = 2.2FF, TA = -40NC to +85NC, unless otherwise noted.
Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Input Operating RangeGuaranteed by output voltage accuracy3.05.5V
Overvoltage Lockout
(Shutdown LDO8 Output)VIN4 rising, VIN1_ = VIN45.755.93V
Overvoltage Hysteresis250mV
Default Output VoltageILOAD = 50mA2.913.003.09V
Maximum Output Current150mA
Current Limit (Note 4)VOUT8 = 90% of its regulation 165360650mA
Dropout Voltage (Note 4)100mA, TA = +85NC150300mV
Line Regulation3.4V P VIN4 P 5.5V, VOUT8 = 3.1V, ILOAD = 100mA2.2mV
Load Regulation50FA < ILOAD < 150mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 30mA60dB
Output Noise Voltage (RMS)100Hz to 100kHz, ILOAD = 30mA45FVRMS
Programmable Output VoltageILOAD = 50mA
Startup Time from Shutdown
(Note 4)ILOAD = 150mA100Fs
Startup Transient Overshoot
(Note 4)ILOAD = 150mA50mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Default Output Voltage±ILOAD = 10mA, VIN3 = 1.8V0.8730.9000.927V
Maximum Output Current50mA
Current Limit (Note 4)VOUT9 = 90% of its regulation55120220mA
Load Regulation50FA < ILOAD < 50mA25mV
Power-Supply Rejection
DVOUT/DVINf = 10Hz to 10kHz, ILOAD = 10mA60dB
Output Noise Voltage100Hz to 100kHz, ILOAD = 10mA45FVRMS
Programmable Output VoltageILOAD = 10mA
Startup Time from Shutdown ILOAD = 50mA100Fs
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
OUT9 (LDO9) ELECTRICAL CHARACTERISTICS (continued)
(MAX8982_: VIN3 = VBUCK2 = 1.8V, CIN3 = 2.2FF, CREFBP = 0.1FF, COUT9 = 2.2FF, TA = -40NC to +85NC, unless otherwise noted.
Typical values are at TA = +25NC.) (Note 3)
RESET ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5V, MAX8982X: VIN1A = VIN1B = +3.3V, VBUCK2 = 1.8V, CBUCK2 = 2.2FF, CREFBP =
0.1FF, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
IRQ ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5.0V, MAX8982X: VIN1A = VIN1B = +3.3V, VBUCK2 = 1.8V, CBUCK2 = 2.2FF, CREFBP = 0.1FF,
TA = -40NC to +85NC. Typical values are at TA = +25NC, unless otherwise specified.) (Note 3)
CURRENT REGULATOR ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5V and VDD_ = 3.2V, MAX8982X: VIN1A = VIN1B = +3.3V and VDD_ = 3.3V, CREFBP = 0.1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
PARAMETERCONDITIONMINTYPMAXUNITS
Startup Transient Overshoot
(Note 4)ILOAD = 50mA50mV
Shutdown Output Impedance
(Active Discharge Resistance)I2C programmable, default off100I
PARAMETERCONDITIONMINTYPMAXUNITS
Output High VoltageInternal logic supply ISOURCE = 0FAVBUCK2
- 0.3VV
Output Low VoltageInternal logic supply ISINK = 500FA0.3V
RESET Enabled (Note 4)From BUCK2 enable (Figure 4)625Fs
RESET Disabled (Note 4)With respect to IRQ = low2678Fs
Pullup Resistance to BUCK281422kI
PARAMETERCONDITIONMINTYPMAXUNITS
Output High VoltageInternal logic supply ISOURCE = 0FAVBUCK2
- 0.3VV
Output Low VoltageInternal logic supply ISINK = 500FA0.3V
Pullup Resistance to BUCK2100200400kI
PARAMETERCONDITIONMINTYPMAXUNITS
DR_ Sink Current Range324mA
DR_ Current Sink Programmable
DR_[2:0] = 000 3
DR_[2:0] = 0016
DR_[2:0] = 0109
DR_[2:0] = 01112
DR_[2:0] = 10015
DR_[2:0] = 10118
DR_[2:0] = 11021
DR_[2:0] = 111 (default)24
DR_ Sink Current Accuracy
(Note 4)
TA = +25NC-10+10%TA = -40NC to +85NC-15+15
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
FLASH TIMER ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5V and VDD_ = +3.2V, MAX8982X: VIN1A = VIN1B = +3.3V and VDD_ = +3.3V, CREFBP = 0.1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 4, Figure 11)
PARAMETERCONDITIONSMINTYPMAXUNITS
Flash Timer Resolution25ms
Pattern Period, tP 7-bit programmable in 25ms steps3175
0 (0000000)
25 (0000001)
3175 (1111111)
Number of Programmable On
Threshold4
Time for Flash to Turn On, t1 7-bit programmable in 25ms steps3175
0 (0000000)
25 (0000001)
3175 (1111111)
Time for Flash to Turn On, t27-bit programmable in 25ms steps3175
0 (0000000)
25 (0000001)
3175 (1111111)
Time for Flash to Turn On, t37-bit programmable in 25ms steps3175
0 (0000000)
25 (0000001)
3175 (1111111)
Time for Flash to Turn On, t47-bit programmable in 25ms steps3175
0 (0000000)
25 (0000001)
3175 (1111111)
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
N32KHZ ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982P: VDD_ = +3.2V, MAX8982X: VDD_ = +3.3V, VBUCK2 = 1.8V, CBUCK2 = 2.2FF, CREFBP = 0.1FF, TA = -40NC
to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
Note 3: Limits are 100% production tested at TA = +25NC, unless otherwise noted. Limits over the temperature range are guaran-
teed by design.
Note 4: Guaranteed by design, not production tested.
FLASH TIMER ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = +5V and VDD_ = +3.2V, MAX8982X: VIN1A = VIN1B = +3.3V and VDD_ = +3.3V, CREFBP = 0.1FF,
TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 4, Figure 11)
PARAMETERCONDITIONMINTYPMAXUNITS
Output High VoltageInternal logic supply ISOURCE = 2mAVBUCK2
- 0.45VV
Output Low VoltageInternal logic supply ISINK = 2mA0.45V
Output Duty Cycle305070%
Output Frequency RangeIncluding initial startup, 20% tolerance 25.63238.4kHz
Startup TimeFrom BUCK2 enable (Figure 4)225Fs
Edge Jitter (Note 4)10ns
SHUTDOWN CURRENT
vs. INPUT VOLTAGE (MAX8982A)
MAX8982A toc01
SHUTDOWN CURRENT (µA)
SHUTDOWN CURRENT
vs. INPUT VOLTAGE (MAX8982X)
MAX8982A toc02
SHUTDOWN CURRENT (µA)
NO LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX8982A)
MAX8982A toc03
SHUTDOWN CURRENT (µA)
BUCK3, OUT3 ON
ALL OTHER OUTPUTS OFF
PARAMETERCONDITIONSMINTYPMAXUNITS
Programmable On-Time, tON4-bit programmable in 25ms steps, same for each flash
timer400
25 (0000)
50 (0001)
400 (1111)
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
NO LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX8982X)
MAX8982A toc04
INPUT VOLTAGE (V)
SHUTDOWN CURRENT (uA)
OUT3 ON
ALL OTHER OUTPUTS OFF
BUCK1 LOAD REGULATION
MAX8982A toc05
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
L = 2.2µH, HITACHI METALS LTD
KSLI-252012AG-2R2
DCR = 100mI
BUCK1 LOAD TRANSIENT
MAX8982A toc06
1.2A
1mA
AC-COUPLED
200mV/div
IBUCK1VOUT = 1V
COUT = 10µF
VBUCK1
100µs/div
BUCK1 EFFICIENCY
vs. LOAD CURRENT
MAX8982A toc07
LOAD CURRENT (mA)
EFFICIENCY (%)
VIN = 5.5V
VOUT = 0.9V
VIN = 5V
VIN = 4.5V
VIN = 4.1V
BUCK1 SWITCHING FREQUENCY
vs. LOAD CURRENT
MAX8982A toc08
SWITCHING FREQUENCY (MHz)
BUCK1 SWITCHING FREQUENCY
vs. TEMPERATURE
MAX8982A toc09
SWITCHING FREQUENCY (MHz)3510-15
-4085
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
BUCK2 LOAD REGULATION
MAX8982A toc12
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
L = 1.0µH, MURATA LQM2MPN1R0NG0
DCR = 85mI
BUCK2 LOAD TRANSIENT
MAX8982A toc13
600mA
1mA
AC-COUPLED
100mV/div
VOUT = 1.8V
IBUCK2
VBUCK2
40µs/div
EFFICIENCY (%)
BUCK2 EFFICIENCY
vs. LOAD CURRENT
MAX8982A toc14
VIN = 5.5V
VIN = 5V
VIN = 4.5V
VIN = 4.1V
BUCK3 LOAD REGULATION
(MAX8982A/MAX8982P ONLY)
MAX8982A toc15
OUTPUT VOLTAGE (V)
L = 2.2µH, HITACHI METALS LTD
KSLI-252012AG-2R2
DCR = 100mI
BUCK1 RAMP-UP TRANSITION
MAX8982A toc10
0.6V
1.2V
NO LOAD
12.5mV/µs RAMP RATE
VBUCK1
20µs/div
BUCK1 RAMP-DOWN TRANSITION
MAX8982A toc11
0.6V
1.2V
IOUT = 1.2A
12.5mV/µs RAMP RATE
VBUCK1
20µs/div
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
BUCK3 LOAD TRANSIENT
(MAX8982A/MAX8982P ONLY)
MAX8982A toc16
1mA
600mA
AC-COUPLED
100mV/div
IBUCK3
VOUT = 3.2V
COUT = 10µF
VBUCK3
20µs/div
BUCK3 EFFICIENCY vs. LOAD CURRENT
(MAX8982A/MAX8982P ONLY)
MAX8982A toc17
LOAD CURRENT (mA)
EFFICIENCY (%)
VIN = 5V
VIN = 5.5V
VOUT = 3.2V
VIN = 4.1VVIN = 4.5V
BUCK4 LOAD REGULATION
(MAX8982A/MAX8982P ONLY)
MAX8982A toc18
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
L = TAIYO YUDEN NR3015T1R0N
DCR = 30mI
BUCK4 LOAD TRANSIENT
(MAX8982A/MAX8982P ONLY)
MAX8982A toc19
AC-COUPLED
50mV/div
1.5A
1mA
VBUCK4
IBUCK4
20µs/div
VOUT = 3.4V
1mA TO 1.5A
BUCK4 EFFICIENCY vs. LOAD CURRENT
(MAX8982A/MAX8982P ONLY)
MAX8982A toc20
EFFICIENCY (%)
10010,000
VIN = 4.1V
VIN = 4.5V
VIN = 5V
VIN = 5.5V
VOUT = 3.4V
BUCK4 SWITCHING FREQUENCY vs. LOAD CURRENT
(MAX8982A/MAX8982P ONLY)
MAX8982A toc21
SWITCHING FREQUENCY (MHz)
2.5600
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
LDO3 LOAD REGULATION
MAX8982A toc25
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
LDO4 LOAD REGULATION
MAX8982A toc26
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)302010
LDO5 LOAD REGULATION
MAX8982A toc27
OUTPUT VOLTAGE (V)
LDO6 LOAD REGULATION
MAX8982A toc28
OUTPUT VOLTAGE (V)
BUCK4 SWITCHING FREQUENCY vs. TEMPERATURE
(MAX8982A/MAX8982P ONLY)
MAX8982A toc22
TEMPERATURE (°C)
SWITCHING FREQUENCY (MHz)35-1510
LDO1 LOAD REGULATION
MAX8982A toc23
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
LDO2 LOAD REGULATION
MAX8982A toc24
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
1.790150
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Typical Operating Characteristics (continued)
(MAX8982A/MAX8982P: VIN1A = VIN1B = 5V, MAX8982X: VIN1A = VIN1B = VDDA = VDDB = VIN4 = 3.3V, CREFBP = 0.1µF, TA = -40°C
to +85°C, Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at TA = +25°C. Limits are 100% production tested at
TA = +25NC, unless otherwise noted. Limits over the temperature range are guaranteed by design.)
LDO7 LOAD REGULATION
MAX8982A toc29
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)602040
LDO8 LOAD REGULATION
(MAX8982A/MAX8982P ONLY)
MAX8982A toc30
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)604020
LDO9 LOAD REGULATION
MAX8982A toc31
LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)604020
LED CURRENT ACCURACY
vs. LED CURRENT SETTING
MAX8982A toc32
LED CURRENT (mA)
LED CURRENT ACCURACY (%)15105
LED3
LED2
LUMEX SML-LX2832SISUGSBC
LED FLASH WAVEFORMS
MAX8982A toc33
24mA
24mA
ILED2
ILED3
OVERVOLTAGE PROTECTION
MAX8982A toc34
5V/div
1V/div
1V/div
2V/div
VIN_
VBUCK1
VBUCK2
VLDO1
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Pin Configurations
WLP
TOP VIEW(BUMP ON BOTTOM)
MAX8982A/MAX8982POUT3N32
kHzOUT9GNDREFOUT6OUT2
VDDBOUT4DR1DR2OUT8VSIMVDDA
IN3DR3OUT5SCLOUT1
LX2BUCK2
BUCK1
DVS1SDAPWR_
REQLX3
BUCK4
BUCK3
PGND2PGND3
PGND1IN1BLX4
PGND4PGND4LX1IN4IN1ALX4
RESETIRQ
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Pin Configurations (continued)
WLP
TOP VIEW(BUMP ON BOTTOM)
MAX8982XOUT3N32
kHzOUT9GNDREFOUT6OUT2
VDDBOUT4DR1DR2DNC
DNCDNC
VSIMVDDA
IN3DR3OUT5SCLOUT1
LX2BUCK2
BUCK1
DVS1SDAPWR_
REQ
PGND2PGND3
PGND1IN1BDNCDNC
PGND4PGND4LX1IN4IN1ADNC
RESETIRQ
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Pin Description
PIN
NAME
FUNCTIONMAX8982A/
MAX8982PMAX8982X
GROUNDGNDGNDAnalog GroundPGND1PGND1Power Ground for BUCK1PGND2PGND2Power Ground for BUCK2PGND3PGND3Power Ground for BUCK3
F6, F7PGND4PGND4Power Ground for BUCK4
INPUT SUPPLY
IN1A—
Input Supply to the IC. The operating voltage range for the MAX8982A is 4.1V to 5.5V.
Connect three 330FF tantalum capacitors as close as possible to IN1A and IN1B.
Connect IN1A to IN1B.IN1A
Input Supply to the IC. The operating voltage range for the MAX8982X is 2.9V to 5.5V.
Bypass with a 22FF ceramic capacitor as close as possible to IN1A and IN1B. Connect
IN1A to IN1B.IN1BIN1BInput Supply to the IC. Connect IN1B to IN1A.IN3IN3Input Supply for LDO4 and LDO9. Connect IN3 to the BUCK2 output. Bypass IN3 with a
2.2FF ceramic capacitor as close as possible to IN3.IN4—Input Supply for LDO8. Bypass with a 1FF ceramic capacitor as close as possible to IN4.
The IN4 operating range is from 3.0V to 5.5V. Connect IN4 to either IN1A and IN1B. IN4Connect IN4 to Both IN1A and IN1BVDDA—Power Input for LDO1 and LDO2. Connect VDDA to VDDB. Bypass VDDA with a 10FF
ceramic capacitor as close as possible to VDDA.VDDAPower Input for LDO1 and LDO2. Connect VDDA to VDDB, IN1A, and IN1B.VDDB—Power Input for LDO3, LDO5, LDO6, and LDO7. Connect VDDB to VDDA.VDDBPower Input for LDO3, LDO5, LDO6, and LDO7. Connect VDDB to VDDA, IN1A, and IN1B.
BUCK CONVERTERSLX1LX1BUCK1 Inductor Connection. LX1 connects to the drains of the internal p-channel and
n-channel MOSFETs.LX2LX2BUCK2 Inductor Connection. LX2 connects to the drains of the internal p-channel and
n-channel MOSFETs.LX3—BUCK3 Inductor Connection. LX3 connects to the drains of the internal p-channel and
n-channel MOSFETs.DNCDo Not Connect
E5, F5LX4—BUCK4 Inductor Connection. LX4 connects to the drains of the internal p-channel and
n-channel MOSFETs. Connect the two LX4 bumps together externally.DNCDo Not ConnectBUCK1BUCK1BUCK1 Output FeedbackBUCK2BUCK2BUCK2 Output FeedbackBUCK3—BUCK3 Output FeedbackDNCDo Not ConnectBUCK4—BUCK4 Output Feedback
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Pin Description (continued)
PIN
NAME
FUNCTIONMAX8982A/
MAX8982PMAX8982X
LDO REGULATORSOUT1OUT1LDO1 Output. Bypass OUT1 with a 4.7FF ceramic capacitor. OUT1 supplies loads up to
300mA. The default output voltage is 2.7V.OUT2OUT2LDO2 Output. Bypass OUT2 with a 1FF ceramic capacitor. OUT2 supplies loads up to
150mA. The default output voltage is 1.8V.OUT3OUT3LDO3 Output. Bypass OUT3 with a 1FF ceramic capacitor. OUT3 supplies loads up to
150mA. The default output voltage is 2.8V.OUT4OUT4LDO4 Output. Bypass OUT4 with a 2.2FF ceramic capacitor. OUT4 supplies loads up to
50mA. The default output voltage is 0.9V.OUT5OUT5LDO5 Output. Bypass OUT5 with a 1FF ceramic capacitor. OUT5 supplies loads up to
150mA. The default output voltage is 3.0V.OUT6OUT6LDO6 Output. Bypass OUT6 with a 1FF ceramic capacitor. OUT6 supplies loads up to
150mA. The default output voltage is 2.7V.VSIM VSIM LDO7 Output. Bypass VSIM with a 1FF ceramic capacitor. VSIM supplies loads up to
150mA. The default output voltage is 3V.OUT8—LDO8 Output. Bypass OUT8 with a 1FF ceramic capacitor. OUT8 supplies loads up to
150mA. The default output voltage is 3V.DNCDo Not ConnectOUT9OUT9LDO9 Output. Bypass OUT9 with a 2.2FF ceramic capacitor. OUT9 supplies loads up to
50mA. The default output voltage is 0.9V.
I2C INTERFACESDASDAI2C Data. SDA is high impedance when off.SCLSCLI2C Clock. SCL is high impedance when off.
CURRENT REGULATORSDR1DR1
Current Regulated Driver 1. Typically used to drive an LED. DR1 can be programmed to
sink 3mA to 24mA in 8 steps (24mA default). If the flash timer is activated, the LED can
be programmed to turn on/off in a preprogrammed pattern. See the Embedded Flash
Timer section.DR2DR2
Current Regulated Driver 2. Typically used to drive an LED. DR2 can be programmed to
sink 3mA to 24mA in 8 steps (24mA default). If the flash timer is activated, the LED can
be programmed to turn on/off in a preprogrammed pattern. See the Embedded Flash
Timer section.DR3DR3
Current Regulated Driver 3. Typically used to drive an LED. DR3 can be programmed to
sink 3mA to 24mA in 8 steps (24mA default). If the flash timer is activated, the LED can
be programmed to turn on/off in a preprogrammed pattern. See the Embedded Flash
Timer section.
LOGIC INPUTSENENActive-High IC Enable Input PWR_REQPWR_REQ
Active-High to Enable All Designated Step-Down Regulators and LDOs in Sequence.
Active-high/low to enable/disable all step-down converters and LDOs after power-on.
The values in the BUCK1DVS1 and BUCK1DVS2 registers are reset to their defaults
when PWR_REQ goes low in normal operation.DVS1DVS1BUCK1 Output Selection Input for DVS Function
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Table 1. Summary of Power Supplies
Pin Description (continued)
*BUCK3, BUCK4, and OUT8 are for the MAX8982A/MAX8982P only.
PIN
NAME
FUNCTIONMAX8982A/
MAX8982PMAX8982X
LOGIC OUTPUTSIRQIRQActive-Low, Open-Drain Interrupt Output. Internal pullup resistor, 200kI, to BUCK2.RESETRESETActive-Low, Open-Drain Reset Output. There is an internal 14kI pullup resistor to
BUCK2.
REFERENCE OUTPUTREFBPREFBP
Reference Bypass. Connect the reference bypass capacitor from REFBP to GND. See
Table 3. High impedance in off condition. VREFBP is 0.8V (typ). Do not use to provide
power to external circuitry.
32kHz CLOCKN32kHzN32kHz32kHz Clock Output. This output is supplied from BUCK2.
PARAMETERBUCK1BUCK2BUCK3*BUCK4*OUT1OUT2OUT3OUT4OUT5OUT6OUT7
(VSIM)OUT8*OUT9
FunctionCoreSystem
LDO
INPUTPARFRFAnalogPLLSDTCXOSIMUSBBB
Default
Voltage (V)0.91.83.23.42.71.82.80.93.02.73.003.00.9
Continuous
Output Current
(mA)
1200**
1300***
Programmable
Voltage
Options (V)
0.600N/A2.903.002.651.52.650.82.802.651.803.000.8
25mV
step
1.203.653.75
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Table 1. Summary of Power Supplies (continued)
*BUCK3, BUCK4, and OUT8 are for the MAX8982A/MAX8982P only.
PARAMETERBUCK1BUCK2BUCK3*BUCK4*OUT1OUT2OUT3OUT4OUT5OUT6OUT7
(VSIM)OUT8*OUT9
Default ON
at Initial
Startup
PWR_
REQONONOFFPWR_
REQ
PWR_
REQONPWR_
REQOFFPWR_
REQOFFONON
ON/OFF
Control After
Power-Up
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
I2C
PWR_
REQ
Default
Active
Discharge
Resistor
OFFONOFFOFFOFFOFFOFFOFFOFFOFFOFFOFFOFF
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
IN1A
LX4
PGND4
IN1A
LX4
PGND4
BUCK4
IN1_
IN1B
330µF * 3
USB
INPUT
0.1µF
2.2µF
0.9V
2.7V
REFBP
GND
OUT9
3.8V
UVLO
OVP
LDO9
(50mA)
16ms
TIMER
5.75V
ON/OFF SEQUENCE
2.7V FOR MAX8982P
SHUTDOWN SIGNAL
IN3
IN1_
IN1B
1µF
1µF
OUT6
LDO6
(50mA)
ON/OFF
SEQUENCE
SHUTDOWN
SIGNAL
VDDB
TCXO
IN1_IN4
1µF
OUT8
INTERRUPT
CHIPSET
ICE8060
ON E400
PLATFORM
STEP-DOWN
CONVERTER 4
(1.8A)
UVLO
(3.8V)
REF
(0.8V)
THERMAL
SHUTDOWN
+160°C
IRQ
SDASDA
SCLSCL
PWR_REQPWR_REQ
HS USB
TRANSCEIVER
3.0V
LDO8
(DEFAULT ON)
150mA
REFVDDB
32kHz
OSCILLATOR
MAX8982A
MAX8982P
ON/OFF CONTROL
AND
I2C INTERFACE
2.2µF
2.2µH
2.2µH
0.9V (DEFAULT)
0.6V TO 1.2V
IN 25mV STEPS
2.2µF
CORE
DCDC 1 SEL
VCC_IO
3.4V (DEFAULT)
3.0V TO 3.75V IN 50mV STEPS
GSM PA/
UMTS PA
PGND3
IN1A
LX3
BUCK3
STEP-DOWN
DC-DC 3
CONVERTER
(DEFAULT ON)
VDDALDOVDDBINPUT
2.2µF
2.2µH
3.2V (DEFAULT)
2.9V TO 3.65V
IN 50mV STEPS
PGND1
IN1A
LX1
BUCK1
DVS1
STEP-DOWN
DC-DC 1CONVERTER
(1.2A)
LDO4
(50mA)
1µH1.8V
2.2µF
2.2µF
PGND2
IN1A
LX2
BUCK2
BUCK2625µs
IN3
OUT4
14kI
PLL
POR_N
0.9V
STEP-DOWN
DC-DC 2
CONVERTER
(DEFAULT
ON, 600mA)
RESET
RTBON
2.2µF
OUT3ANALOG
BASEBAND
BB CHIPSET
ICE 8060
ON E400
PLATFORM
RESET
BUCK2
10µF
LDO3
DEFAULT ON
150mA
2.8V
1µF
VDDA
OUT2
LDO2
(150mA)
LDO1
(300mA)
1.8VRF1V8
RF2V7
1µF
VDDA
OUT12.7V
4.7µF
VDDB
OUT5
LDO5
(150mA)
3.0V
1µF
VDDB
VSIM
1.8V/3.0V
SIM LDO (LDO7)
150mA
1µFBUCK2
200kI
IN1_
N32kHz
DR1
OSC 32kI
FLASH
TIMER
BUCK2
DR2
DR3
OPTIONAL
RESISTORS
3-CHANNEL
CURRENT
REGULATOR
(24mA,
DEFAULT)
(3—24mA IN 3mA STEPS)
CHIPSET
ICE 8260
USIM
SD CARD
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Table 2. External Component List for Figure 1
Note: Input/output capacitance should be as close as possible to the IC. All capacitors are ceramic X5R or X7R, unless otherwise noted.
LOCATIONEXTERNAL COMPONENTSNOTES
IN1A, IN1B3 x 330FF tantalum capacitorsBuck stability and GSM PA supply
IN32.2FFInput for LDO4 and LDO9
IN41.0FFInput for LDO8
OUT14.7FFLDO compensation and load transient
response
OUT21.0FFLDO compensation
OUT31.0FFLDO compensation
OUT42.2FFLDO compensation
OUT51.0FFLDO compensation
OUT61.0FFLDO compensation
VSIM (OUT7)1.0FFLDO compensation
OUT81.0FFLDO compensation
OUT92.2FFLDO compensation
VDDA, VDDB
Total capacitance R total output capacitance
for LDO1, LDO2, LDO3, LDO5, LDO6, and
VSIM. Use a 10FF capacitor on VDDA/VDDB
as recommended.
All LDOs stability
BUCK1 for BB Core2.2FFFor low noise, 1.2A continuous load
BUCK2 for BB System IO2.2FFFor low noise
BUCK3 as LDO Input2.2FFFor low noise
BUCK4 for GSM PA/UMTS PA2 x 22FF Supply for both GSM PA and UMTS PA
LX11FH to 4.7FH2.2FH recommended (Table 60)
LX21FH to 4.7FH1.0FH recommended (Table 60)
LX31FH to 4.7FH2.2FH recommended (Table 60)
LX41FH to 4.7FH2.2FH recommended (Table 60)
REFBP0.1FFNoise filterA pulldown resistor, if necessary.
Any Bump Required to Pass 8kV
Module Level ESD0.1FFAbsorb ESD energy
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
IN1A
VDDA
VDDB
IN1B
IN4
3.3V
INPUT
0.1µF
2.2µF
22µF
0.9V
2.7V
REFBP
GND
OUT9
5.75V
LDO9
(50mA)
2.7V
SHUTDOWN SIGNAL
ON/OFF SEQUENCE
OVP
UVLO
IN3
IN1B
VCC_USB
1µF
OUT6
LDO6
(50mA)
VDDB
TCXO
UVLO
(2.7V)
REF
(0.8V)
THERMAL
SHUTDOWN
+160°C
VDDB
MAX8982X
ON/OFF CONTROL
AND
I2C INTERFACE
2.2µH
2.2µF
CORE
DCDC 1 SEL
VCC_IO
PGND1
IN1A
LX1
BUCK1
DVS1
STEP-DOWN
DC-DC 1
CONVERTER
(1.2A)
LDO4
(50mA)
ON = BUCK 2EN + 625µs
1µH1.8V
2.2µF
2.2µF
PGND2
IN1A
LX2
BUCK2
BUCK2
IN3
OUT4
14kI
VCC_PLL
POR_N
0.9V
STEP-DOWN
DC-DC 2
CONVERTER
(DEFAULT
ON, 600mA)
RESET
RTBON
1µF
OUT3ANALOG
BASEBAND
BB CHIPSET
ICE 8060
ON E400
PLATFORM
RESET
LDO3
DEFAULT ON
150mA
2.8V
1µF
VDDA
OUT2
LDO2
(150mA)
LDO1
(300mA)
1.8VRF1V8
RF2V7
1µF
VDDA
OUT12.7V
4.7µF
VDDB
OUT5
LDO5
(150mA)
3.0V
1.8V
1µF
VDDB
VSIM
1.8V/3.0V
SIM LDO (LDO7)
150mA
1µF
CHIPSET
ICE 82 xx
USIM
SD CARD
16ms
TIMER
IN1_
ON/OFF
SEQUENCE
SHUTDOWN
SIGNAL
INTERRUPT
CHIPSET
ICE8060
ON E400
PLATFORM
IRQ
SDA
SDA
SCL
SCL
PWR_REQPWR_REQ
32kHz
OSCILLATOR
BUCK2
200kI
3.3V INPUT
N32kHz
DR1
OSC 32kI
FLASH
TIMER
BUCK2
DR2
DR3
OPTIONAL
RESISTORS
3-CHANNEL
CURRENT
REGULATOR
(24mA,
DEFAULT)
(3—24mA IN 3mA STEPS)
0.9V (DEFAULT)
0.6V TO 1.2V
IN 25mV STEPS
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Detailed Description
Power-On/Off Control
The power-on/off state diagram is shown in Figure 3.
When the IN1_ supply voltage is valid and EN is high,
the default power supplies turn on in sequence (Figure
4). Once powered up, any step-down or LDO output can
be enabled or disabled through I2C, or they can be pro-
grammed to be controlled by the PWR_REQ logic input.
PWR_REQ
PWR_REQ is a control input from baseband chipset used
to enable/disable specified regulators.
After power-up, when PWR_REQ goes logic-high, any
step-down or LDO output programmed for PWR_REQ
control is enabled in a predefined sequence. The regulators
are powered up in four groups as shown in Figure 5. See the
following for the regulators belonging to each group. When
PWR_REQ goes logic-low, all regulators programmed for
Any regulator that is set to on or off though I2C is not
affected by PWR_REQ, except for BUCK1. The pro-
grammed values in BUCK1DVS1 and BUCK1DVS2 are
reset to their defaults when PWR_REQ goes low even in
normal operation.
Group A: BUCK3 (MAX8982A/MAX8982P only) LDO2 (default is PWR_REQ On mode) BUCK2
Group B: LDO1 (default is PWR_REQ On mode) LDO3 BUCK4 (MAX8982A/MAX8982P only)
Group C: LDO6 (default is PWR_REQ On mode) LDO5 LDO7 LDO8 (MAX8982A/MAX8982P only)
Group D: BUCK1 (default is PWR_REQ On mode) LDO4 (default is PWR_REQ On mode)
Table 3. External Component List for Figure 2
Note: Input/output capacitance should be as close as possible to the IC. All capacitors are ceramic X5R or X7R, unless otherwise noted.
LOCATIONEXTERNAL COMPONENTSNOTES
IN1A, IN1B22FFBuck stability
IN32.2FFInput for LDO4 and LDO9
IN4Connect to IN1A and IN1B
OUT14.7FFLDO compensation and load transient
response
OUT21.0FFLDO compensation
OUT31.0FFLDO compensation
OUT42.2FFLDO compensation
OUT51.0FFLDO compensation
OUT61.0FFLDO compensation
VSIM (OUT7)1.0FFLDO compensation
OUT92.2FFLDO compensation
VDDA, VDDB
Total capacitance R total output capacitance
for LDO1, LDO2, LDO3, LDO5, LDO6, and
VSIM.
All LDOs stability. Connect VDDA and
VDDB to IN1A and IN1B.
BUCK1 for BB Core2.2FFFor low noise, 1.2A continuous load
BUCK2 for BB System IO2.2FFFor low noise
LX11FH to 4.7FH2.2FH recommended (Table 60)
LX21FH to 4.7FH1.0FH recommended (Table 60)
REFBP0.1FFNoise filterA pulldown resistor, if necessary
Any Bump Required to Pass 8kV
Module Level ESD0.1FFAbsorb ESD energy
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Active Discharge
All regulators include an internal resistor for discharging
the output when the regulator is shut down. In the default
state (except BUCK2), this resistor is not connected so
the output decay depends only on the applied load. To
enable this discharge resistor, set the appropriate bit in
the BUCK1-4ADIS, LDO1-8ADIS, or LDO9ADIS register.
The active discharge resistor values are specified in the
General Electrical Characteristics table.
Figure 3. Power-On/Off State Diagram with IN3 Connected to BUCK2 Output and IN4 Connected to IN1_. Default PWR_REQ
Regulators Are Shown.
SHUTDOWNALL REGULATORS
DISABLED
I2C HIGH IMPEDANCE
REF DISABLED
32kHz DISABLED
BUCK3 ENABLED (MAX8982A/MAX8982P)
BUCK2 ENABLED
LDO3 ENABLED
LDO8 ENABLED (MAX8982A/MAX8982P)
LDO9 ENABLED
RESET = HIGH
VREFBP = 0.8V
I2C ENABLED
32kHz CLOCK ENABLED
BUCK1 ENABLED
LDO1 ENABLED
LDO2 ENABLED
LDO4 ENABLED
LDO6 ENABLED
RESET = HIGH
VREFBP = 0.8V
I2C ENABLE
32kHz CLOCK ENABLED
BUCK1 DISABLED
LDO1 DISABLED
LDO2 DISABLED
LDO4 DISABLED
LDO6 DISABLED
RESET = HIGH
VREFBP = 0.8V
I2C ENABLED
32kHz CLOCK ENABLED
VIN1_ < 3.5V (MAX8982A)
OR VIN1_ < 2.4V (MAX8982P/MAX8982X)
OR VIN1_ > 5.75V
OR EN = LOW
VIN1_ > 3.8V (TYP) (MAX8982A)
VIN1_ > 2.7V (TYP) (MAX8982P/MAX8982X)
AND EN = HIGH
NOTE: ENABLE OF BUCKS AND
LDOS AND CONTROL OF
BUCKS AND LDOS
BY PWR_REQ
CAN BE MODIFIED
AFTER STARTUP THROUGH I2C.
PWR_REQ = HIGH
FROM
ANY STATE
POWER-UPPWR_REQ
= HIGH
PWR_REQ
= LOW
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
Figure 4. MAX8982_ Power-On Timing Diagram at Initial Startup with EN Connected to IN1_. BUCK3 and OUT8 Are for the
MAX8982A/MAX8982P Only.
OFFOFF
EN AND IN1_
BUCK 3
BUCK 2
OUT 3
OUT 8
RESET
FOR ANALOG (2.8V)
FOR USB (3.0V)
FOR IO (1.8V)
(3.2V)
UVLO RISINGUVLO FALLING
ON SEQUENCING RESTARTS
WHEN INPUT IS ABOVE
UVLO RISING
THRESHOLD~16ms
125µs
225µs
375µs
125µs
OUT 9
FOR BB (0.9V)125µs
625µs
31µs
CONTINUOUS32kHz OUTPUT
IRQ
OPERATING
STATE
POWER-ON
SEQUENCE
POWER-ON
SEQUENCEON
OTHER ON-
REGULATORS
31µs TO 62µs
Power-Management ICs for
ICERA E400 Platform
MAX8982A/MAX8982P/MAX8982X
BUCK1, BUCK2, and BUCK3
Step-Down Converters
The step-down converters are optimized for high effi-
ciency over a wide load range, small external component
size, low output ripple, and excellent transient response.
The step-down converters also feature an internal
MOSFET switch with optimized on-resistance and an
internal synchronous rectifier to maximize the efficiency
and reduce the number of external components. The ICs
use a proprietary hysteretic PWM control scheme that
switches with a nearly fixed frequency. Figure 6 shows
the frequency variation versus load current with a 5V
input supply and at TA = +25°C.
Setting the Output Voltage on BUCK1
The default output is 0.9V. The BUCK1 voltage is program-
mable through I2C from 0.6V to 1.2V in 25mV increments.
Dynamic Voltage Scaling (DVS)
Function on Buck 1
BUCK1 includes DVS that allows two output voltages
to be programmed through I2C, and an external con-
trol input to select between the two voltages. Toggling
DVS1 changes the BUCK1 output voltage on-the-fly
between the two programmed voltages (Figure 7). Each
BUCK1DVS_ register specifies a voltage in the 0.6V to
1.2V range in 25mV increments.
Figure 5. MAX8982_ Power-On Timing Diagram in PWR_REQ ON Mode After Power-Up
DVS1
I2C INTERFACE
0.6V TO 1.2V
IN 25mV STEPS
BUCK1DVS1
(0X3F)
(DEFAULT = 0.9V)
BUCK1DVS2
(0X40)
(DEFAULT = 0.9V)
BUCK1 OUTPUT
(DEFAULT = 0.9V)
~10µs
100µs
200µs
375µs
PWR_REQ
GROUP A : OUT 2,*
GROUP B : LDO1,*
BUCK 2, BUCK 3**
OUT 3, BUCK 4**
GROUP C : OUT6,*
OUT5, OUT7, OUT8**
GROUP D : BUCK 1*, OUT4,*
OUT9
OUTPUT DECAY DEPENDS ON THE LOAD
(BUILT-IN TIME DELAY TO
ENABLE REGULATORS)
*THESE REGULATORS DEFAULT TO PWR_REQ CONTROL. THE OTHERS MUST BE PROGRAMED TO PWR_REQ CONTROL BY I2C.
**BUCK3, BUCK4, AND OUT8 ARE FOR THE MAX8982A/MAX8982P ONLY.
FREQUENCY vs. LOAD AT 5V INPUT
LOAD (mA)
FREQUENCY (MHz)
BUCK1
BUCK2
BUCK3
DVS1BUCK1 OUTPUT
HighSet by BUCK1DVS2 register
LowSet by BUCK1DVS1 register
Truth Table
