MAX5080ATE+-MAX5081ATE+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX5080ATE+ ,1A, 40V, MAXPower Step-Down DC-DC ConvertersApplications PACKAGE CODE16 TQFN-EP*MAX5080ATE -40°C to +125°C T1655-2®FireWire Power Supplies Auto ..
MAX5081ATE+T ,1A, 40V, MAXPower Step-Down DC-DC ConvertersELECTRICAL CHARACTERISTICS(V = V = 12V, V = V , V = PGND = SGND, T = T = -40°C to +125°C, unless ot ..
MAX5083ATE ,1.5A, 40V, MAXPower Step-Down DC-DC ConvertersApplications® *EP = Exposed pad.● FireWire Power Supplies ● Industrial● Distributed Power Pin Confi ..
MAX5087BATE+T ,45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset DelayApplicationsMAX5087BATE+ 16 TQFN-EP* 5.0● IndustrialMAX5087BATE/V+ 16 TQFN-EP* 5.0● Home Security/S ..
MAX508ACPP+ ,Voltage-Output, 12-Bit DAC with Internal Reference and 12-Bit InterfaceGeneral Description The MAX507/MAX508 are complete 12-bit, voltage- output digital-to-analog co ..
MAX508ACWP , Voltage-Output, 12-Bit DACs with Internal Reference
MAX9380EUA ,Single-Ended-to-Differential LVECL/LVPECL 2:1 Multiplexerapplications. The input is selected by a single select Output Low with Open Inputsinput. The selec ..
MAX9383ESA ,ECL/PECL Phase-Frequency DetectorsApplicationsMAX9383EUA* -40°C to +85°C 8 µMAXMAX9383ESA -40°C to +85°C 8 SOPrecision Clock Distribu ..
MAX9388EUP+ ,Differential 5:1 or 4:1 ECL/PECL Multiplexers with Single/Dual Output Buffersapplications, and feature♦ 0.3ps(RMS) Random Jitterextremely low propagation delays (318ps, typ) an ..
MAX9390EHJ ,Anything-to-LVDS Dual 2 x 2 Crosspoint SwitchesFeaturesThe MAX9390/MAX9391 dual 2 x 2 crosspoint switches 1.5GHz Operation with 250mV Differenti ..
MAX9390EHJ+ ,Anything-to-LVDS Dual 2 x 2 Crosspoint SwitchesFeaturesThe MAX9390/MAX9391 dual 2 x 2 crosspoint switches ♦ 1.5GHz Operation with 250mV Differenti ..
MAX9390EHJ+T ,Anything-to-LVDS Dual 2 x 2 Crosspoint SwitchesApplicationsGND 4 21 ENA0MAX9390High-Speed Telecom/Datacom EquipmentENB0 5 20 GNDMAX9391Central-Off ..

MAX5080ATE+-MAX5081ATE+T
1A, 40V, MAXPower Step-Down DC-DC Converters
General Description
The MAX5080/MAX5081 are 250kHz PWM step-down
DC-DC converters with an on-chip, 0.3Ωhigh-side
switch. The input voltage range is 4.5V to 40V for the
MAX5080 and 7.5V to 40V for the MAX5081. The output
is adjustable from 1.23V to 32V and can deliver up to
1A of load current.
Both devices utilize a voltage-mode control scheme for
good noise immunity in the high-voltage switching envi-
ronment and offer external compensation allowing for
maximum flexibility with a wide selection of inductor val-
ues and capacitor types. The switching frequency is
internally fixed at 250kHz and can be synchronized to
an external clock signal through the SYNC input. Light
load efficiency is improved by automatically switching
to a pulse-skip mode.
All devices include programmable undervoltage lock-
out and soft-start. Protection features include cycle-by-
cycle current limit, hiccup-mode output short-circuit
protection, and thermal shutdown. Both devices are
available in a space-saving, high-power (2.7W), 16-pin
TQFN package and are rated for operation over the
-40°C to +125°C temperature range.
Applications
FireWire®Power SuppliesAutomotive
Distributed PowerIndustrial
Features4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081)
Input Voltage Range1A Output CurrentVOUTRange From 1.23V to 32VInternal High-Side SwitchFixed 250kHz Internal OscillatorAutomatic Switchover to Pulse-Skip Mode at
Light LoadsExternal Frequency SynchronizationThermal Shutdown and Short-Circuit ProtectionOperates Over the -40°C to +125°C Temperature
RangeSpace-Saving (5mm x 5mm) High-Power 16-Pin
TQFN Package
MAX5080/MAX5081
1A, 40V, MAXPower Step-Down
DC-DC Converters
19-3656; Rev 1; 2/07
Ordering Information
PARTTEMP RANGEPIN-
PACKAGE
PKG
CODE
MAX5080ATE-40°C to +125°C16 TQFN-EP*T1655-2
MAX5081ATE-40°C to +125°C16 TQFN-EP*T1655-2
MAX5080
VIN
4.5V TO 40V
ON/OFF
PGND
REG
SYNCSGNDPGNDSSCOMP
DVREGC-
VOUT
PGND
CBST
CSSBSTypical Operating Circuits
FireWire is a registered trademark of Apple Computer, Inc.
Typical Operating Circuits continued at end of data sheet.
*EP = Exposed pad.
Pin Configurations appear at end of data sheet.
MAX5080/MAX5081
1A, 40V, MAXPower Step-Down
DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
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.
IN, ON/OFFto SGND..............................................-0.3V to +45V
LX to SGND.................................................-0.3V to (VIN+ 0.3V)
BST to SGND................................................-0.3V to (VIN+ 12V)
BST to LX................................................................-0.3V to +12V
PGND to SGND.....................................................-0.3V to +0.3V
REG, DVREG, SYNC to SGND...............................-0.3V to +12V
FB, COMP, SS to SGND...........................-0.3V to (VREG+ 0.3V)
C+ to PGND (MAX5080 only)................(VDVREG- 0.3V) to +12V
C- to PGND (MAX5080 only)................-0.3V to (VDVREG+ 0.3V)
Continuous current through internal power MOSFET (pins 11/12
connected together and pins 13/14 connected together)= +125°C.........................................................................3A= +150°C.........................................................................2A
Continuous Power Dissipation*(TA= +70°C)
16-Pin TQFN (derate 33.3mW/°C above +70°C) ...2666.7mW
16-Pin TQFN (θJA)........................................................30°C/W
16-Pin TQFN (θJC).......................................................1.7°C/W
Operating Temperature Range.........................-40°C to +125°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(VIN= VON/OFF= 12V, VREG= VDVREG, VSYNC= PGND = SGND, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values
are at TA= + 25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
MAX50804.540Input Voltage RangeVINMAX50817.540V
VIN rising, MAX50803.94.2Undervoltage Lockout ThresholdUVLOVIN rising, MAX50816.87.3V
MAX50800.4Undervoltage Lockout HysteresisUVLOHYSTMAX50810.7V
VFB = 0V, MAX508010.5Switching Supply Current (PWM
Operation)ISWVFB = 0V, MAX50819.5mA
VIN = 12V, VOUT = 3.3V, IOUT = 1A84
EfficiencyVIN = 4.5V, VOUT = 3.3V, IOUT = 1A
(MAX5080)88%
MAX50801.42.5No-Load Supply Current
(PFM Operation)MAX50811.32.3mA
Shutdown CurrentISHDNVON/OFF = 0V, VIN = 40V200300µA
ON/OFF CONTROL
Input Voltage ThresholdVON/ OFFVON/ OFF rising1.201.231.25V
Input Voltage Hysteresis0.12V
Input Bias CurrentVON/OFF = 0 to 40V-250+250nA
ERROR AMPLIFIER/SOFT-START
Soft-Start CurrentISS81524µA
Reference Voltage (Soft-Start)VSS1.2151.2281.240V
FB Regulation VoltageVFBICOMP = -500µA to +500µA1.2151.2281.240V
FB Input Range01.5V
FB Input Current-250+250nA
COMP Voltage RangeICOMP = -500µA to +500µA0.254.50V
Open-Loop Gain80dB
Unity-Gain Bandwidth1.8MHz
*As per JEDEC 51 Standard
MAX5080/MAX5081
1A, 40V, MAXPower Step-Down
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(VIN= VON/OFF= 12V, VREG= VDVREG, VSYNC= PGND = SGND, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values
are at TA= + 25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
FB Offset VoltageICOMP = -500µA to +500µA-5+5mV
OSCILLATOR
FrequencyfSWVSYNC = 0V225250275kHz
VSYNC = 0V, VIN = 4.5V, MAX508087
VSYNC = 0V, VIN = 7.5V, MAX508187Maximum Duty CycleDMAX
VSYNC = 0V, VIN ≤ 40V87
SYNC High-Level Voltage2.2V
SYNC Low-Level Voltage0.8V
SYNC Frequency RangefSYNC150350kHz
PWM Modulator GainfSYNC = 150kHz to 350kHz10V/V
Ramp Level Shift (Valley)0.3V
POWER SWITCH
Switch On-ResistanceVBST - VLX = 6V0.30.6Ω
Switch Gate ChargeVBST - VLX = 6V6nC
Switch Leakage CurrentVIN = 40V, VLX = VBST = 0V10µA
BST Leakage CurrentVBST = VLX = VIN = 40V10µA
CHARGE PUMP
C- Output Voltage LowMAX5080 only, sinking 10mA0.1V
C- Output Voltage HighMAX5080 only, relative to DVREG, sourcing
10mA0.1V
DVREG to C+ On-ResistanceMAX5080 only, sourcing 10mA10Ω
LX to PGND On-ResistanceSinking 10mA12Ω
CURRENT-LIMIT COMPARATOR
Pulse-Skip ThresholdIPFM100200300mA
Cycle-by-Cycle Current LimitIILIM1.422.6A
Number of Consecutive ILIM
Events to Hiccup7
Hiccup Timeout512Clock
periods
INTERNAL VOLTAGE REGULATOR
MAX50804.7555.25Output VoltageVREGMAX50817.688.4V
VIN = 5.5V to 40V, MAX50801Line RegulationVIN = 9.0V to 40V, MAX50811mV/V
Load RegulationIREG = 0 to 20mA0.25V
VIN = 4.5V, IREG = 20mA, MAX50800.5Dropout VoltageVIN = 7.5V, IREG = 20mA, MAX50810.5V
MAX5080/MAX5081
1A, 40V, MAXPower Step-Down
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(VIN= VON/OFF= 12V, VREG= VDVREG, VSYNC= PGND = SGND, TA= TJ= -40°C to +125°C, unless otherwise noted. Typical values
are at TA= + 25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
THERMAL SHUTDOWN
Thermal Shutdown TemperatureTemperature rising+160°C
Thermal Shutdown Hysteresis20°C
Note 1:100% production tested at TA= +25°C and TA= TJ= +125°C. Limits at -40°C are guaranteed by design.
Typical Operating Characteristics
(VIN= 12V, see Figure 5 (MAX5080) and Figure 6 (MAX5081), TA= +25°C, unless otherwise noted.)
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE (MAX5080)
MAX5080 toc01
TEMPERATURE (°C)
UNDERVOLTAGE LOCKOUT HYSTERESIS (V)
UNDERVOLTAGE LOCKOUT HYSTERESIS
vs. TEMPERATURE (MAX5081)
MAX5080 toc02
TEMPERATURE (°C)
UNDERVOLTAGE LOCKOUT HYSTERESIS (V)
ON/OFF THRESHOLD HYSTERESIS
vs. TEMPERATURE
MAX5080 toc03
TEMPERATURE (°C )
ON/OFF THRESHOLD HYSTERESIS (V)
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5080)
MAX5080 toc04
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (30202510155
TA = +135°C
TA = +25°C
TA = +85°C
TA = -40°C
VON/OFF = 0V
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5081)
MAX5080 toc05
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (30202510155
TA = +135°C
TA = +25°C
TA = +85°C
TA = -40°C
VON/OFF = 0V
NO-LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX5080)
MAX5080 toc06
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)30510152025
TA = +135°C
TA = +25°C
TA = +85°C
TA = -40°C
OPERATING FREQUENCY
vs. TEMPERATURE
MAX5080 toc07
TEMPERATURE (°C)
OPERATING FREQUENCY (kHz)
VIN = 4.5V
VIN = 40V
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE (MAX5080)
MAX5080 toc08
INPUT VOLTAGE (V)
MAXIMUM DUTY CYCLE (%)30202510155
MAXIMUM DUTY CYCLE
vs. INPUT VOLTAGE (MAX5081)
MAX5080 toc09
INPUT VOLTAGE (V)
MAXIMUM DUTY CYCLE (%)30202510155
040MAX5080/MAX5081
1A, 40V, MAXPower Step-Down
DC-DC Converters
Typical Operating Characteristics (continued)
(VIN= 12V, see Figure 5 (MAX5080) and Figure 6 (MAX5081), TA= +25°C, unless otherwise noted.)
OPEN-LOOP GAIN/PHASE vs. FREQUENCY
MAX5080 toc10
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
17510,000
GAIN
PHASE
OUTPUT CURRENT LIMIT
vs. INPUT VOLTAGE
MAX5080 toc11
INPUT VOLTAGE (V)
OUTPUT CURRENT LIMIT (A)30202510155
MAX5080
TA = +135°C
TA = +25°C
TA = +85°C
TA = -40°C
TURN-ON/OFF WAVEFORM
MAX5080 toc12
ILOAD = 1A
VOUT
2V/div
VON/OFF
2V/div
2ms/div
TURN-ON/OFF WAVEFORM
MAX5080 toc13
VON/OFF
2V/div
VOUT
2V/div
2ms/div
ILOAD = 100mA

Partno	Mfg	Dc	Qty	Available	Descript
MAX5080ATE+	MAXIM	N/a	1500	avai	1A, 40V, MAXPower Step-Down DC-DC Converters
MAX5081ATE+T	MAXIM	N/a	9	avai	1A, 40V, MAXPower Step-Down DC-DC Converters