MAX17006ETP+ ,1.2MHz Low-Cost, High-Performance ChargersFeatures♦ High Switching Frequency (1.2MHz)The MAX17005/MAX17006/MAX17015 are high-frequen-cy multi ..
MAX17007AGTI , Dual and Combinable QPWM Graphics Core Controllers for Notebook Computers
MAX17007AGTI+ ,Dual and Combinable QPWM Graphics Core Controllers for Notebook ComputersFeatures♦ Dual Quick-PWM with Fast Transient ResponseThe MAX17007A/MAX17007B/MAX17008 are dual Quic ..
MAX17007AGTI+T ,Dual and Combinable QPWM Graphics Core Controllers for Notebook ComputersELECTRICAL CHARACTERISTICS(V = 12V, V = V = V = V = 5V, V = 2V, SKIP = GND, T = 0 to +85°C, unless ..
MAX17007GTI+ ,Dual and Combinable QPWM Graphics Core Controllers for Notebook ComputersFeatures♦ Dual Quick-PWM with Fast Transient ResponseThe MAX17007/MAX17008 are dual Quick-PWM™ step ..
MAX17008GTI+ ,Dual and Combinable QPWM Graphics Core Controllers for Notebook ComputersMAX17007A/MAX17007B/MAX1700819-3200; Rev 3; 9/10Dual and Combinable QPWM GraphicsCore Controllers f ..
MAX4512ESE+ ,Quad, Rail-to-Rail, Fault-Protected, SPST Analog SwitchesELECTRICAL CHARACTERISTICS—Dual SuppliesV+ = +15V, V- = -15V, GND = 0V, T =T to T , unless otherwis ..
MAX4513ESE ,Quad, Rail-to-Rail, Fault-Protected, SPST Analog SwitchesApplicationsATE Equipment IN1 1 16IN2 Data AcquisitionCOM1 2 15 COM2Industrial and Process-Control ..
MAX4513ESE+ ,Quad, Rail-to-Rail, Fault-Protected, SPST Analog SwitchesMAX4511/MAX4512/MAX451319-4760; Rev 1; 8/02Quad, Rail-to-Rail, Fault-Protected,SPST Analog Switches
MAX4514CSA ,Low-Voltage, Low-On-Resistance, SPST, CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—+5V Supply (continued)(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T = T to ..
MAX4514CSA+ ,Low-Voltage, Low-On-Resistance, SPST, CMOS Analog SwitchesELECTRICAL CHARACTERISTICS—+5V Supply (continued)(V+ = +4.5V to +5.5V, V = 2.4V, V = 0.8V, T = T to ..
MAX4514CUK ,Low-Voltage, Low-On-Resistance, SPST, CMOS Analog SwitchesGeneral Description ________
MAX17006ETP+
1.2MHz Low-Cost, High-Performance Chargers
General DescriptionThe MAX17005/MAX17006/MAX17015 are high-frequen-
cy multichemistry battery chargers. These circuits fea-
ture a new high-frequency current-mode architecture
that significantly reduces component size and cost. The
charger uses a high-side MOSFET with n-channel syn-
chronous rectifier. Widely adjustable charge current,
charge voltage, and input current limit simplify the con-
struction of highly accurate and efficient chargers.
The charge voltage and charge current are set with
analog control inputs. The charge current setting can
also be adjusted with a PWM input. High-accuracy cur-
rent-sense amplifiers provide fast cycle-by-cycle cur-
rent-mode control to protect against short circuits to the
battery and respond quickly to system load transients.
In addition, the charger provides a high-accuracy ana-
log output that is proportional to the adapter current. In
the MAX17015, this current monitor remains active
when the adapter is absent to monitor battery dis-
charge current.
The MAX17005 charges three or four Li+ series cells,
and the MAX17006 charges two or three Li+ series
cells. The MAX17015 adjusts the charge voltage setting
and the number of cells through a feedback resistor-
divider from the output. All variants of the charger can
provide at least 4A of charge current with a 10mΩ
sense resistor.
The charger utilizes a charge pump to control an n-channel
adapter selection switch. The charge pump remains
active even when the charger is off. When the adapter
is absent, a p-channel MOSFET selects the battery.
The MAX17005/MAX17006/MAX17015 are available in
a small, 4mm x 4mm x 0.8mm 20-pin, lead-free TQFN
package. An evaluation kit is available to reduce
design time.
ApplicationsNotebook Computers
Tablet PCs
Portable Equipment with Rechargeable Batteries
FeaturesHigh Switching Frequency (1.2MHz)Controlled Inductor Current-Ripple ArchitectureReduced BOM Cost
Small Inductor and Output Capacitors±0.4% Accurate Charge Voltage±2.5% Accurate Input-Current Limiting±3% Accurate Charge Current
Single-Point CompensationMonitor Outputs for±2.5% Accurate Input Current Limit±2.5% Battery Discharge Current
(MAX17015 only)AC Adapter DetectionAnalog/PWM Adjustable Charge-Current SettingBattery Voltage Adjustable for 3 and 4 Cells(MAX17005) or 2 and 3 Cells (MAX17006)Adjustable Battery Voltage (4.2V to 4.4V/Cell)Cycle-by-Cycle Current LimitBattery Short-Circuit Protection
Fast Response for Pulse Charging
Fast System-Load-Transient ResponseProgrammable Charge Current < 5AAutomatic System Power Source Selection with
n-Channel MOSFETInternal Boost Diode+8V to +26V Input Voltage Range
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
Ordering Information19-4041; Rev 0; 2/08
EVALUATION KIT
AVAILABLE+Denotes a lead-free package.
PARTTEMP RANGEPIN-
PACKAGE
PKG
CODE
MAX17005ETP+ -40°C to+85°C 20 Thin QFN
(4mm x4mm)T2044-3
MAX17006ETP+-40°C to+85°C 20 Thin QFN
(4mm x4mm)T2044-3
MAX17015ETP+-40°C to+85°C 20 Thin QFN
(4mm x4mm)T2044-3
Pin Configuration and Minimal Operating Circuit appear at
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= 0°C to +85°C,unless otherwise noted. Typical values are at TA= +25°C.)
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.
DCIN, CSSP, CSSN, BATT, CSIN, CSIP, ACOK,
LX to AGND.......................................................-0.3V to +30V
BST to LDO.............................................................-0.3V to +30V
CSIP to CSIN, CSSP to CSSN..............................-0.3V to +0.3V
IINP, FB, ACIN to AGND.............................-0.3V to (VAA+ 0.3V)
VAA, LDO, ISET, VCTL, CC to AGND.......................-0.3V to +6V
DHI to LX....................................................-0.3V to (BST + 0.3V)
BST to LX..................................................................-0.3V to +6V
DLO to PGND............................................-0.3V to (LDO + 0.3V)
PGND to AGND....................................................-0.3V to +0.3V
Continuous Power Dissipation (TA= +70°C)
16-Pin TQFN (derate 16.9mW/°C above +70°C)....1349.1mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERCONDITIONSMINTYPMAXUNITS
CHARGE-VOLTAGE REGULATION2 cells,VVCTL = GND(for MAX17006)8.36648.40 8.4336
3 cells, VVCTL = VAA(for MAX17005and MAX17006)12.54912.60 12.651
4 cells,VVCTL= GND(for MAX17005)16.73316.80 16.867Battery Regulation-Voltage Accuracy
FB accuracyusingFB divider(for MAX17015)
(Note 1)2.0916 2.1 2.1084
FB Input Bias Curent -1+1µA
2 cells (for MAX17006), 4 cells (for MAX17005)0.0 VAA/2
VCTL Range
3 cells (for MAX17005and MAX17006)VAA/2
+0.2 VAA
VCTL GainVCELL/VVCTL 5.85 6 6.15 V/V
VCTL Input Bias Current VVCTL = GND andVCTL = VAA -1+1µA
CHARGE-CURRENT REGULATIONISET Range 0.0 VAA/2 V
ISET = 1.4V80 ISET Full-Scale SettingISET = 99.9% dutycycle 60mV
58.2 60 61.8 mVVISET= VAA/4 or ISET
= 99.9%duty cycle-3+3%
38.2 40 41.8 mV
Full-Charge Current Accuracy
(CSIP to CSIN)VISET = VAA/6 or ISET
= 66.7%duty cycle-4.5 +4.5 %
1.4 3 4.6 mVTrickle Charge-Current Accuracy
VBATT = 1V to 16.8V
VISET = VAA/80 orISET5% duty cycle-52 +52 %
Charge-Current Gain ErrorBased on VISET= VVAA/4 and VISET= VVAA/80 -2+2%
Charge-Current Offset ErrorBased on VISET= VVAA/4 and VISET= VVAA/80 -1.4 +1.4 mV
BATT/CSIP/CSIN Input Voltage Range 0 24 V
ISETfalling21 26 31 ISETPower-Down Mode Threshold ISETrising33 40 47 mV
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
PARAMETERCONDITIONSMINTYPMAXUNITSVISET = 3V-0.2 +0.2 ISET Input Bias Current CSSN =BATT, VISET= 5V-0.2+0.2µA
Rising2.4 ISET PWMThresholdFalling 0.8 V
ISET Frequency0.128 500 kHz
ISET Effective ResolutionfPWM=3.2MHz 8 Bits
INPUT-CURRENT REGULATION58.5 60 61.5 mVInput Current-LimitThresholdVCSSP - VCSSN-2.5 +2.5 %
CSSNInput Bias Current Adapterpresent -0.1 +0.1 µA
CSSP/CSSN Input-Voltage Range 8.0 26.0 V
IINP TransconductanceVCSSP - VCSSN = 60mV2.66 2.8 2.94 µA/mV
VCSSP - VCSSN = 60mV, VIINP= 0Vto 4.5V-2.5+2.5IINP AccuracyVCSSP - VCSSN = 35mV-2.5 +2.5 %
SUPPLY AND LINEAR REGULATORDCIN Input Voltage Range 8 26 V
DCIN falling7.98.1DCIN Undervoltage-Lockout (UVLO) Trip-PointDCIN rising8.7 8.9 V
Adapter present(Note 2)3 6 mADCIN + CSSP + CSSNQuiescent CurrentAdapter absent (Note 2)30 50 µA
Adapter absent (Note 2)10 20 VBATT = 16.8VCharger shutdown(Note 2)10 20 BATT+ CSIP + CSIN + LX Input Current
VBATT = 2V to 19V, adapterpresent (Note 2)200 500
LDOOutput Voltage 8.0V < VDCIN < 26V, noload5.15 5.35 5.55 V
LDO Load Regulation0 < ILDO < 40mA100 200 mV
LDO UVLO Threshold3.2 4.1 5.0 V
REFERENCESVAA Output Voltage IVAA = 50µA4.184.204.22V
VAA UVLO ThresholdVAA falling3.1 3.9 V
ACINACIN Threshold2.058 2.1 2.142 V
ACINThresholdHysteresis10 20 30 mV
ACIN Input Bias Current -1+1µA
ACOK
ACOK Sink Current VACOK = 0.4V, VACIN = 1.5V6 mA
ACOK Leakage CurrentVACOK = 5.5V, VACIN = 2.5V1 µA
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= 0°C to +85°C,unless otherwise noted. Typical values are at TA= +25°C.)
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
PARAMETERCONDITIONSMINTYPMAXUNITS
SWITCHING REGULATORDHIOff-Time K FactorVDCIN = 19V, VBATT= 10V0.029 0.030 0.041 µs/V
Sense Voltage for Minimum Discontinuous
Mode RippleCurrentVCSIP - VCSIN10 mV
Zero-Crossing Comparator ThresholdVCSIP - VCSIN10 mV
Cycle-by-Cycle Current-Limit Sense VoltageVCSIP- VCSIN105 110 115 mV
DHI Resistance HighIDLO =10mA1.5 3
DHI Resistance LowIDLO =-10mA0.8 1.75
DLO Resistance HighIDLO = 10mA3 6
DLO ResistanceLowIDLO =-10mA3 7
ADAPTER DETECTION Adapter Absence-Detect ThresholdVDCIN - VBATT, VDCIN falling+70+120+170mV
Adapter DetectThresholdVDCIN - VBATT,VDCIN rising+360+420+580mV
AdapterSwitch Charge-Pump FrequencyChargerShutdown180 200 220 Hz
DLO 0.04 0.1 0.20 AdapterSwitch Charge-PumpRefresh PulseDHI 0.070.15 0.30µs
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= 0°C to +85°C,unless otherwise noted. Typical values are at TA= +25°C.)
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= -40°C to +85°C,unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
CHARGE-VOLTAGE REGULATION2 cells,VVCTL = GND(for MAX17006)8.366 8.433
3 cells,VVCTL = VAA
(for MAX17005and MAX17006)12.54912.651
4 cells,VVCTL= GND(for MAX17005)16.73 16.86 Battery Regulation-Voltage Accuracy
FB accuracyusingFB divider(for MAX17015)
(Note 1)2.091 2.108
2 cells (for MAX17006),
4 cells (for MAX17005)0.0 VAA/2
- 0.2
VCTL Range
3 cells (for MAX17005and MAX17006)VAA/2
+ 0.2 VAA
VCTL GainVCELL/VVCTL 5.85 6.15 V/V
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= -40°C to +85°C,unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
CHARGE-CURRENT REGULATIONISET Range 0.0 VAA/2 V
57.5 62.5 mVVISET= VAA/4 or
ISET = 99.9%duty cycle-4.2 +4.2 %
38 42 mV
Full Charge-Current Accuracy
(CSIP to CSIN)VISET = VAA/6 or
ISET = 66.7%duty cycle-5+5%
1.4 4.6 mVTrickle Charge-Current Accuracy
VBATT = 1V to 16.8V
VISET = VAA/80 or
ISET = 5%duty cycle-52 +52 %
Charge-Current Gain ErrorBased on VISET= VVAA/4 and VISET= VVAA/80 -2+2%
Charge-Current Offset ErrorBased on VISET= VVAA/4 and VISET= VVAA/80 -1.4 +1.4 mV
BATT/CSIP/CSIN Input Voltage Range 0 24 V
ISET falling21 31 ISETPower-Down Mode Threshold ISET rising33 47 mV
Rising2.4 ISET PWMThresholdFalling 0.8 V
ISET Frequency0.128 500 kHz
INPUT-CURRENT REGULATION58.2 61.8 mVInput Current-LimitThresholdVCSSP - VCSSN+3%
CSSNInput Bias Current Adapterpresent -2+2µA
CSSP/CSSN Input-Voltage Range 8.0 26.0 V
IINP TransconductanceVCSSP - VCSSN = 60mV2.66 2.94 µA/mV
VCSSP - VCSSN = 60mV, VIINP= 0Vto 4.5V-2.5+2.5IINP AccuracyVCSSP - VCSSN = 35mV-2.5 +2.5 %
SUPPLY AND LINEAR REGULATORDCIN Input-Voltage Range 8 26 V
DCIN falling7.9DCIN UVLO Trip-PointDCIN rising8.9 V
Adapter present(Note 2)6 mADCIN + CSSP + CSSNQuiescent CurrentAdapter absent (Note 2)50 µA
Adapter absent (Note 2)20 VBATT = 16.8V
Charger shutdown(Note 2)20 BATT+ CSIP + CSIN + LX Input Current
VBATT = 2V to 19V, adapterpresent (Note 2)500
LDOOutput Voltage 8.0V < VDCIN < 26V, noload5.15 5.55 V
LDO Load Regulation0 < ILDO < 40mA200 mV
LDO UVLO Threshold3.2 5.0 V
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, VDCIN= VCSSP= VCSSN= 19V, VBATT= VCSIP= VCSIN= 16.8V, VVCTL= VAA, VISET= 1V, TA
= -40°C to +85°C,unless otherwise noted.)
PARAMETERCONDITIONSMINTYPMAXUNITS
REFERENCESVAA Output Voltage IVAA= 50µA4.184.22V
VAA UVLO ThresholdVAA falling3.9 V
ACINACIN Threshold2.058 2.142 V
ACIN ThresholdHysteresis10 30 mV
ACOK
ACOK Sink Current VACOK = 0.4V, VACIN = 1.5V6 mA
SWITCHING REGULATORDHIOff-Time K FactorVDCIN = 19V, VBATT= 10V0.029 0.041 µs/V
Cycle-by-Cycle Current-Limit Sense VoltageVCSIP - VCSIN105 115 mV
DHI Resistance HighIDLO = 10mA3
DHI Resistance LowIDLO =-10mA1.75
DLO Resistance HighIDLO = 10mA6
DLO ResistanceLowIDLO =-10mA7
ADAPTER DETECTION Adapter Absence-Detect ThresholdVDCIN - VBATT, VDCIN falling+70 +170mV
Adapter DetectThresholdVDCIN - VBATT,VDCIN rising+320+620mV
AdapterSwitch Charge-Pump Frequency180 220 Hz
DLO 0.04 0.2 AdapterSwitch Charge-PumpRefresh PulseDHI 0.07 0.3µs
Note 1:Accuracy does not include errors due to external resistance tolerances.
Note 2:Adapter present conditions are tested at VDCIN= 19V and VBATT= 16.8V. Adapter absent conditions are tested at
VDCIN= 16V, VBATT= 16.8V.
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
Typical Operating Characteristics(Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, VCTL= GND, TA= +25°C, unless otherwise noted.)
IINP DC ERROR
vs. SYSTEM CURRENTMAX17005 toc01
SYSTEM CURRENT (A)
IINP ERROR (%)312
IINP ERROR
vs. SYSTEM CURRENT
MAX17005 toc02
SYSTEM CURRENT (A)
IINP ERROR (%)
VBATT = 16.8V
VBATT = 8.4VVBATT = 12.6V
ISET PWM DUTY-CYCLE CHANGEMAX17005 toc03
DUTY CYCLE
CHARGE-CURRENT ERROR (%)
ISET PWM DUTY-CYCLE CHANGE
MAX17005 toc04
DUTY CYCLE
CHARGE CURRENT (A)9010203040506070
ISET PWM FREQUENCY SWEEP
MAX17005 toc05
FREQUENCY (kHz)
CHARGE-CURRENT ERROR (%)
DUTY CYCLE = 75%
DUTY CYCLE = 25%
BATTERY VOLTAGE-SETTING ERRORMAX17005 toc06
VCTL (V)
BATTERY VOLTAGE ERROR (%)
SYSTEM LOAD TRANSIENT
MAX17005 toc07
200μs/div
SYSTEM
CURRENT
5A/div
CHARGING
CURRENT
5A/div
INDUCTOR
CURRENT
5A/div
EFFICIENCY
vs. CHARGE CURRENTMAX17005 toc08
CHARGE CURRENT (A)
EFFICIENCY (%)
2 CELLS3 CELLS
4 CELLS
VAA LOAD REGULATIONMAX17005 toc11
LOAD CURRENT (mA)
VOLTAGE (V)
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
LDO LOAD REGULATION
MAX17005 toc09
LDO CURRENT (mA)
LDO VOLTAGE (V)51015202530
LDO LINE REGULATION
MAX17005 toc10
INPUT VOLTAGE (V)
LDO VOLTAGE (V)22101214161820
VAA vs. TEMPERATURE
MAX17005 toc12
TEMPERATURE (°C)
(V)80-40-2002040
HIGH-SIDE MOSFET OFF-TIME AND
SWITCHING FREQUENCY vs. BATTERY VOLTAGE
MAX17005 toc13
BATTERY VOLTAGE (V)
SWITCHING FREQUENCY (MHz)
HIGH-SIDE MOSFTE OFF-TIME (1410124682
VIN = 20V
HIGH-SIDE MOSFET OFF-TIME
SWITCHING FREQUENCY
ADAPTER REMOVALMAX17005 toc16
200ms/div
5.00V5.00V
5.00V
ADAPTER CURRENT
vs. ADAPTER VOLTAGEMAX17005 toc14
ADAPTER VOLTAGE (V)
ADAPTER CURRENT (mA)510
BATTERY LEAKAGE
MAX17005 toc15
BATTERY VOLTAGE (V)
BATTERY LEAKAGE CURRENT (161868241012
020
ypical Operating Characteristics (continued)(Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, VCTL= GND, TA= +25°C, unless otherwise noted.)
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
Pin Description
PINNAMEFUNCTIONDCIN Charger Bias SupplyInput.BypassDCIN with a 1µFcapacitor to PGND.
2 AGNDAnalogGroundCSIPOutput Current-Sense PositiveInput. Connect a current-sense resistor from CSIP to CSIN.
4 CSINOutput Current-Sense NegativeInput
5 IINP
Input Current-MonitorOutput. IINPsourcesthe current proportionalto the currentsensed across
CSSP and CSSN. The transconductancefrom (CSSP- CSSN) to IINPis2.8µA/mV. See theAnalog
Input Current-Monitor Output section to configure the current monitor for a particular gainsetting. BATTBattery Voltage Feedback Input ACOKAC Detect Output. Thisopen-drain output ishighimpedance whenACINislower than VAA/2.
Connect a 10k pullup resistor from LDO to ACOK. CSSPInput Current Sense forPositive Input. Connectacurrent-sense resistor from CSSP to CSSN.CSSNInput Current-Sense Negative Input
10 ISET
DualMode™Input for Setting Maximum Charge Current. ISET can beconfigured either witha
resistor voltage-dividerorwith a PWM signalfrom128Hz to 500kHz.Ifthere is no clock edge
within20ms, ISETdefaultsto analoginput mode. PullISET to GND toshut downthecharger.
In the MAX17015, when the adapterisabsent, drive ISET above 1V to enable IINPduring battery
discharge. When the adapteris reinserted, ISET must be released to the correctcontrollevelwithin
300ms.
11 PGNDPowerGround Connection for MOSFET Drivers
12 DLOLow-Side Power-MOSFET DriverOutput. Connect tolow-siden-channelMOSFET gate.
13 LDOLinear RegulatorOutput. LDOprovides the power to the MOSFETdrivers. LDO is the output of the 5.4V
linearregulator supplied from DCIN. Bypass LDOwith a 4.7µF ceramic capacitor from LDO to PGND.
14 BST High-Side Driver Supply. Connecta 0.68µFcapacitor from BST toLX.
15 DHIHigh-Side Power-MOSFET DriverOutput. Connect to high-side n-channelMOSFET gate. LXHigh-Side Driver Source Connection. Connect a 0.68µF capacitor fromBST toLX.
17 ACIN AC AdapterDetect Input. ACIN is the input to an uncommittedcomparator.
18 VAA4.2VVoltageReference and Device Power-SupplyInput.Bypass VAA witha 1µF capacitor to GND.
19 CCVoltageRegulationLoop-Compensation Point. Connect 3k and 0.01µF capacitorinseriesfrom
CC to GND.
20 VCTL BatteryVoltage Adjust Input.VCTL sets the numberof cells andadjusts the voltage percell. The
adjustment range is4.2V to 4.4Vper cell. See the Setting Charge Voltagesection.BPBackside Paddle. Connect the backside paddle toanalog ground.
Dual Mode is a trademark of Maxim Integrated Products, Inc.
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance ChargersBATT
ADAPTER
BSTCSSPCSSN
DHI
DLO
PGND
RS1
15mΩ
CSIN
CSIP
BATT
BATTERY
VCTL
ISET
LDO
GND
IINP
VAA
ADAPTER
PWM SIGNAL
22.6kΩ
0.68μF
0.1μF
0.01μF
200kΩ
3kΩ
200kΩ
CIN
COUT
RS2
10mΩ
Q1b
1μF
4.7μF
ONLY FOR MAX17015
SYSTEM LOAD
1μF
CIN = 2 x 4.7μF
COUT = 4.7μF
L1 = 2μH
2MΩ
Q1a
DCIN
0.1μF
RACIN1
RACIN2
ACIN
ACOK
LDO10kΩ
MAX17005
MAX17006
MAX17015
Figure 1. Typical Operating Circuit
Detailed DescriptionThe MAX17005/MAX17006/MAX17015 include all the
functions necessary to charge Li+, NiMH, and NiCd
batteries. An all n-channel synchronous-rectified step-
down DC-DC converter is used to implement a preci-
sion constant-current, constant-voltage charger. The
charge current and input current-limit sense amplifiers
have low-input offset errors (250μV typ), allowing the
use of small-valued sense resistors.
The MAX17005/MAX17006/MAX17015 use a new ther-
mally optimized high-frequency architecture. With this
new architecture, the switching frequency is adjusted
to control the power dissipation in the high-side
MOSFET. Benefits of the new architecture include:
reduced output capacitance and inductance, resulting in
smaller printed-circuit board (PCB) area and lower cost.
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers CSA
A = 17.5V/V
CSSN
CSSP
Gm =
2.8μA/mV
IINP
GMS
CSIN
CSIP
GMI
ISET
26mV
CHARGER
SHUTDOWN
CELL
SELECT
LOGIC
BATT
VAA
VCTL
GMV
LOWEST
VOLTAGE
CLAMP
CSI
60mV
PWM
FILTER
DHI
DLO
PGND
BST
LEVEL
SHIFTHIGH-SIDE
DRIVER
LOW-SIDE
DRIVER
CCMP
IMIN
IMAX
IZX
10mV
OVP
DC-DC
CONVERTER
110mV
10mV
BDIV
BDIV
VCTL + 100mV
5.4V LINEAR
REGULATOR
4.2V
REFERENCE
DCIN
LDO
VAA
POWER
FAIL
LDO
GND
BATTVAA/2
ACOK
LDO
ACIN
MAX17005
MAX17006
MAX17015
CSA
A = 17.5V/V
Figure 2. Functional Diagram
The MAX17005/MAX17006/MAX17015 feature a volt-
age-regulation loop (CCV) and two current-regulation
loops (CCI and CCS). The loops operate independently
of each other. The CCV voltage-regulation loop moni-
tors BATT to ensure that its voltage never exceeds the
voltage set by VCTL. The CCI battery charge current-
regulation loop monitors current delivered to BATT to
ensure that it never exceeds the current limit set by
ISET. The charge current-regulation loop is in control as
long as the battery voltage is below the set point. When
the battery voltage reaches its set point, the voltage-
regulation loop takes control and maintains the battery
voltage at the set point. A third loop (CCS) takes control
and reduces the charge current when the adapter cur-
rent exceeds the input current limit.
The MAX17005/MAX17006/MAX17015 have single-
point compensation. The two current loops are internal-
ly compensated while the voltage loop is compensated
with a series RC network at CC pin. See the CC Loop
Compensationsection for the resistor and capacitor
selection. A functional diagram is shown in Figure 2.
MAX17005/MAX17006/MAX17015
1.2MHz Low-Cost,
High-Performance Chargers
Setting Charge VoltageThe VCTL input adjusts the battery-output voltage,
VBATT, and determines the number of cells. For 3- and
4-cell applications, use the MAX17005; for 2- and 3-cell
applications, use the MAX17006. Use the MAX17015 to
adjust the cell number and set the cell voltage with a
resistive voltage-divider from the output. Based on the
version of the part, the number of cells and the level of
VCTL should be set as in Table 1:
The MAX17005 and MAX17006 support from 4.2V/cell
to 4.4V/cell, whereas the MAX17015 supports minimum
2.1V. The maximum voltage is determined with the
dropout performance of IC. When the required voltage
falls outside the range available with the MAX17005 or
MAX17006, the MAX17015 should be used.
The charge-voltage regulation for the MAX17005 and
MAX17006 is calculated with the following equations:
for 3-cell selection of MAX17005 and MAX17006, 4.2V
> VCTL > 2.4V:
for 2- or 4-cell selection of MAX17006 or MAX17005,
respectively, 0V < VCTL < 1.8V. Connect VCTL to GND
or to VAAfor default 4.2V/cell battery-voltage setting.
For the MAX17015, connect VCTL to GND to set the FB
regulation point to 2.1V. The charge-voltage regulation is
calculatedwith the following equation:
There are two constraints in choosing R7 and R8. The
resistors cannot be too small since they discharge the
battery, and they cannot be too large because FB pin
consumes less than 1μA of input bias current. Pick R8
to be approximately 10kΩand then calculate R7.
FB regulation error (±0.5% max) and the tolerance of R7
and R8 both contribute to the error on the battery volt-
age. Use 0.1% feedback resistors for best accuracy.
Setting Charge CurrentThe voltage at ISET determines the voltage across cur-
rent-sense resistor RS2. ISET can accept either analog
or digital inputs. The full-scale differential voltage
between CSIP and CSIN is 80mV (8A for RS2 = 10mΩ)
for the analog input, and 60mV (6A for RS2 = 10mΩ) for
the digital PWM input.
When the MAX17005/MAX17006/MAX17015 power up
and the charger is ready, if there is no clock edge with-
in 20ms, the circuit assumes ISET is an analog input,
and disables the PWM filter block. To configure the
charge current, force the voltage on ISET according to
the following equation:
The input range for ISET is from 0 to VAA/2. To shut
down the charger, pull ISET below 26mV.
If there is a clock edge on ISET within 20ms, the PWM
filter is enabled and ISET accepts digital PWM input.
The PWM filter has a DAC with 8-bit resolution that cor-
responds to equivalent VCSIP-CSINsteps.mVCHGISET×240RRCHGREGFBSETPOINT__=×+87V
CELLVCTL=+426.VV
CELLVCTL=+−4242..
VERSIONNO. OFCELLSLEVELMAX170053 2.4V < VCTL <4.2V
MAX170054 0V < VCTL <1.8V
MAX170062 0V < VCTL <1.8V
MAX170063 2.4V < VCTL <4.2V
MAX17015Sets FBVCTL = GND orVCTL = VAA
Table 1. Cell ConfigurationCSIN
BATTERY
COUT
MAX17015
Figure 3. MAX17015 Charge-Voltage Regulation Feedback Network
