MAXIM MAX17005, MAX17006, MAX17015 Technical data

General Description

The MAX17005/MAX17006/MAX17015 are high-frequency multichemistry battery chargers. These circuits feature a new high-frequency current-mode architecture that significantly reduces component size and cost*. The charger uses a high-side MOSFET with n-channel synchronous rectifier. Widely adjustable charge current, charge voltage, and input current limit simplify the construction 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 current-sense amplifiers provide fast cycle-by-cycle current-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 analog output that is proportional to the adapter current. In the MAX17015, this current monitor remains active when the adapter is absent to monitor battery discharge 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 resistordivider 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.

Applications

Notebook Computers

Tablet PCs

Portable Equipment with Rechargeable Batteries

Features

♦ High Switching Frequency (1.2MHz) ♦ Controlled Inductor Current-Ripple Architecture

Reduced BOM Cost Small Inductor and Output Capacitors

♦ ±0.4% Accurate Charge Voltage ♦ ±2.5% Accurate Input-Current Limiting ♦ ±3% Accurate Charge Current ♦ Single-Point Compensation ♦ Monitor Outputs for

±2.5% Accurate Input Current Limit ±2.5% Battery Discharge Current

(MAX17015 only)

AC Adapter Detection

♦ Analog/PWM Adjustable Charge-Current Setting ♦ Battery 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 Limit

Battery Short-Circuit Protection Fast Response for Pulse Charging Fast System-Load-Transient Response

♦ Programmable Charge Current < 5A ♦ Automatic System Power Source Selection with

n-Channel MOSFET

♦ Internal Boost Diode ♦ +8V to +26V Input Voltage Range

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost,

High-Performance Chargers

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4041; Rev 0; 2/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

Denotes a lead-free package.

Pin Configuration and Minimal Operating Circuit appear at end of data sheet.

Patent pending.

PART TEMP RANGE

MAX17005ETP+ -40°C to +85°C

MAX17006ETP+ -40°C to +85° C

MAX17015ETP+ -40°C to +85° C

PINPACKAGE

20 Thin QFN (4mm x 4mm)

PKG

CODE

T2044-3

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost, High-Performance Chargers

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= 0°C to +85°C,

unless otherwise noted. Typical values are at T

= +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 (V

+ 0.3V)

, 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 (T

= +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

CHARGE-VOLTAGE REGULATION

Battery Regulation-Voltage Accuracy

FB Input Bias Curent -1 +1 μA

VCTL Range

VCTL Gain V

VCTL Input Bias Current V

CHARGE-CURRENT REGULATION

ISET Range 0.0 VAA/2 V

ISET Full-Scale Setting

Ful l-Charge Current Accuracy (CSIP to CSIN)

Trickle Charge-Current Accuracy

Charge-Current Gain Error Based on V

Charge-Current Offset Error Based on V

BATT/CSIP/CSIN Input Voltage Range 0 24 V

ISET Power-Down Mode Threshold

PARAMETER CONDITIONS MIN TYP MAX UNITS

2 cel ls, V

3 cel l s, V

4 cel ls, V

FB accuracy using FB divider (for MAX17015) (Note 1)

2 cells (for MAX17006), 4 cell s (for MAX17005) 0.0

3 cell s (for MAX17005 and MAX17006)

CELL/VVCTL

VCTL

ISET = 1.4V 80

ISET = 99.9% duty cycle 60

BATT

ISET falling 21 26 31

ISET ri sing 33 40 47

VCTL

= VAA(for MAX17005 and MAX17006) 12.549 12.60 12.651

VCTL

5.85 6 6.15 V/V

= GND and VCTL = V

= 1V to 16.8V

ISET

= GND (for MAX17006) 8.3664 8.40 8.4336

= GND (for MAX17005) 16.733 16.80 16.867

= V

VAA

= V

VAA

= VAA/4 or ISET

ISET

= 99.9% duty cycle

= VAA/6 or ISET

ISET

= 66.7% duty cycle

= VAA/80 or ISET

ISET

= 5% duty cycle

/4 and V

ISET

= V

/80 -2 +2 %

VAA

/80 -1.4 +1.4 mV

VAA

2.0916 2.1 2.1084

-0.2

VAA/2

+0.2

-1 +1 μA

58.2 60 61.8 mV

-3 +3 %

38.2 40 41.8 mV

-4.5 +4.5 %

1.4 3 4.6 mV

-52 +52 %

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost,

High-Performance Chargers

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= 0°C to +85°C,

unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

ISET Input Bias Current

ISET PWM Threshold

ISET Frequency 0.128 500 kHz

ISET Effective Resolution f

INPUT-CURRENT REGULATION

Input Current-Limit Threshold V

CSSN Input Bias Current Adapter present -0.1 +0.1 μA

CSSP/CSSN Input-Voltage Range 8.0 26.0 V

IINP Transconductance V

IINP Accuracy

SUPPLY AND LINEAR REGULATOR

DCIN Input Voltage Range 8 26 V

DCIN Undervoltage-Lockout (UVLO) Trip-Point

DCIN + CSSP + CSSN Quiescent Current

BATT + CSIP + CSIN + LX Input Current

LDO Output Voltage 8.0V < V

LDO Load Regulation 0 < I

LDO UVLO Threshold 3.2 4.1 5.0 V

REFERENCES

VAA Output Voltage I

VAA UVLO Threshold VAA falling 3.1 3.9 V

ACIN

ACIN Thresho ld 2.058 2.1 2.142 V

ACIN Threshold Hysteresis 10 20 30 mV

ACIN Input Bias Current -1 +1 μA

ACOK

ACOK Sink Current V ACOK Leakage Current V

ISET

CSSN = BATT, V

Ri sing 2.4

Fal ling 0.8

PWM

CSSP

DCIN falling 7.9 8.1

DCIN rising 8.7 8.9

Adapter present (Note 2) 3 6 mA

Adapter absent (Note 2) 30 50 μA

BATT

VAA

ACOK

= 3V -0.2 +0.2

=3.2MHz 8 Bits

- V

CSSN

- V

CSSN

- V

CSSN

- V

CSSN

= 16.8V

= 2V to 19V, adapter present (Note 2) 200 500

DCIN

< 40mA 100 200 mV

LDO

= 50μA 4.18 4.20 4.22 V

= 0.4V, V

= 5.5V, V

ISET

= 60mV 2.66 2.8 2.94 μA/mV

= 60mV, V

= 35mV -2.5 +2.5

< 26V, no load 5.15 5.35 5.55 V

ACIN

= 5V -0.2 +0.2

= 0V to 4.5V -2.5 +2.5

IINP

Adapter absent (Note 2) 10 20

Charger shutdown (Note 2) 10 20

= 1.5V 6 mA

= 2.5V 1 μA

58.5 60 61.5 mV

-2.5 +2.5 %

μA

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost, High-Performance Chargers

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= 0°C to +85°C,

unless otherwise noted. Typical values are at T

= +25°C.)

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= -40°C to +85°C,

unless otherwise noted.)

PARAMETER CONDITIONS MIN TY P MAX UNITS

SWITCHING REGULATOR

DHI Off-Time K Factor V

Sense Voltage for Minimum Discontinuous Mode Ripple Current

Zero-Cros sing Comparator Threshold V

Cycle-by-Cycle Current-Limit Sense Voltage V

DHI Resistance High I

DHI Resistance Low I

DLO Resistance High I

DLO Resistance Low I

ADAPTER DETECTION

Adapter Absence-Detect Threshold V

Adapter Detect Threshold V

Adapter Switch Charge-Pump Frequency Charger Shutdown 180 200 220 Hz

Adapter Switch Charge-Pump Refresh Pulse

DCIN

CSIP

DLO

DCIN

= 19V, V

- V

CSIN

- V

CSIN

- V

CSIN

BATT

= 10V 0.029 0.030 0.041 μs/V

10 mV

105 110 115 mV

=10mA 1.5 3 

= -10mA 0.8 1.75 

= 10mA 3 6 

= -10mA 3 7 

- V

, V

BATT

- V

BATT,VDCIN

falling +70 +120 +170 mV

DCIN

rising +360 +420 +580 mV

DLO 0.04 0.1 0.20

DHI 0.07 0.15 0.30

μs

PARAMETER CONDITIONS MIN TY P MAX UNITS

CHARGE-VOLTAGE REGULATION

Battery Regulation-Voltage Accuracy

VCTL Range

VCTL Gain V

2 cel ls, V

3 cel ls, V

VCTL

= GND (for MAX17006) 8.366 8.433

= V

(for MAX17005 and MAX17006)

4 cel ls, V

= GND (for MAX17005) 16.73 16.86

VCTL

FB accuracy using FB divider (for MAX17015) (Note 1)

2 cel ls (for MAX17006), 4 cell s (for MAX17005)

3 cell s (for MAX17005 and MAX17006)

CELL/VVCTL

5.85 6.15 V/V

12.549 12.651

2.091 2.108

VAA/2 + 0.2

0.0

VAA/2

- 0.2

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost,

High-Performance Chargers

_______________________________________________________________________________________ 5

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= -40°C to +85°C,

unless otherwise noted.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

CHARGE-CURRENT REGULATION

ISET Range 0.0 VAA/2 V

Ful l Charge-Current Accurac y (CSIP to CSIN)

Trickle Charge-Current Accuracy

Charge-Current Gain Error Based on V

Charge-Current Offset Error Based on V

BATT/CSIP/CSIN Input Voltage Range 0 24 V

ISET Power-Down Mode Threshold

ISET PWM Threshold

ISET Frequency 0.128 500 kHz

INPUT-CURRENT REGULATION

Input Current-Limit Threshold V

CSSN Input Bias Current Adapter present -2 +2 μA

CSSP/CSSN Input-Voltage Range 8.0 26.0 V

IINP Transconductance V

IINP Accuracy

SUPPLY AND LINEAR REGULATOR

DCIN Input-Voltage Range 8 26 V

DCIN UVLO Trip-Point

DCIN + CSSP + CSSN Quiescent Current

BATT + CSIP + CSIN + LX Input Current

LDO Output Voltage 8.0V < V

LDO Load Regulation 0 < I

LDO UVLO Threshold 3.2 5.0 V

= 1V to 16.8V

BATT

ISET

= VAA/4 or

ISET = 99.9% duty cycl e

= VAA/6 or

ISET

ISET = 66.7% duty cycl e

= VAA/80 or

ISET

ISET = 5% duty cycle

= V

/4 and V

= V

VAA

/4 and V

ISET

57.5 62.5 mV

-4.2 +4.2 %

38 42 mV

-5 +5 %

1.4 4.6 mV

-52 +52 %

= V

/80 -2 +2 %

VAA

= V

/80 -1.4 +1.4 mV

VAA

ISET falling 21 31

ISET ris ing 33 47

Ri sing 2.4

Fal ling 0.8

CSSP

- V

CSSN

= 60mV 2.66 2.94 μA/mV

CSSN

= 60mV, V

CSSN

= 35mV -2.5 +2.5

CSSN

= 0V to 4.5V -2.5 +2.5

IINP

58.2 61.8 mV

-3 +3 %

DCIN falling 7.9

DCIN rising 8.9

Adapter present (Note 2) 6 mA

Adapter absent (Note 2) 50 μA

= 16.8V

BATT

= 2V to 19V, adapter present (Note 2) 500

BATT

DCIN

< 40mA 200 mV

LDO

Adapter absent (Note 2) 20

Charger shutdown (Note 2) 20

< 26V, no load 5.15 5.55 V

μA

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost, High-Performance Chargers

6 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

DCIN

= V

CSSP

= V

CSSN

= 19V, V

BATT

= V

CSIP

= V

CSIN

= 16.8V, V

VCTL

= VAA, V

ISET

= 1V, TA= -40°C to +85°C,

unless otherwise noted.)

Note 1: Accuracy does not include errors due to external resistance tolerances. Note 2: Adapter present conditions are tested at V

DCIN

= 19V and V

BATT

= 16.8V. Adapter absent conditions are tested at

DCIN

= 16V, V

BATT

= 16.8V.

PARAMETER CONDITIONS MIN TY P MAX UNITS

REFERENCES

VAA Output Voltage I

VAA UVLO Threshold VAA falling 3.9 V

ACIN

ACIN Thresho ld 2.058 2.142 V

ACIN Threshold Hysteresis 10 30 mV

ACOK

ACOK Sink Current V

SWITCHING REGULATOR

DHI Off-Time K Factor V

Cycle-by-Cycle Current-Limit Sense Voltage V

DHI Resistance High I

DHI Resistance Low I

DLO Resistance High I

DLO Resistance Low I

ADAPTER DETECTION

Adapter Absence-Detect Threshold V

Adapter Detect Threshold V

Adapter Switch Charge-Pump Frequency 180 220 Hz

Adapter Switch Charge-Pump Refresh Pulse

VAA

DLO

DLO 0.04 0.2

DHI 0.07 0.3

= 50μA 4.18 4.22 V

= 0.4V, V

ACOK

= 19V, V

DCIN

- V

CSIP

CSIN

= 10mA 3 

= -10mA 1.75 

= 10mA 6 

= -10mA 7 

- V

DCIN

BATT

- V

DCIN

BATT,VDCIN

, V

ACIN

BATT

DCIN

= 1.5V 6 mA

= 10V 0.029 0.041 μs/V

falling +70 +170 mV

rising +320 +620 mV

105 115 mV

μs

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost,

High-Performance Chargers

_______________________________________________________________________________________ 7

Typical Operating Characteristics

(Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, V

CTL

= GND, TA= +25°C, unless otherwise noted.)

IINP DC ERROR

vs. SYSTEM CURRENT

MAX17005 toc01

SYSTEM CURRENT (A)

IINP ERROR (%)

4312

-8

-6

-4

-2

-10 05

IINP ERROR

vs. SYSTEM CURRENT

MAX17005 toc02

SYSTEM CURRENT (A)

IINP ERROR (%)

4.03.52.5 3.01.0 1.5 2.00.5

-8

-6

-4

-2

-10

04.5

BATT

= 16.8V

BATT

= 8.4V

BATT

= 12.6V

ISET PWM DUTY-CYCLE CHANGE

MAX17005 toc03

DUTY CYCLE

CHARGE-CURRENT ERROR (%)

0.8 0.90.1 0.2 0.3 0.4 0.5 0.6 0.7

0.5

1.0

1.5

2.0

2.5

3.0

01.0

ISET PWM DUTY-CYCLE CHANGE

MAX17005 toc04

DUTY CYCLE

CHARGE CURRENT (A)

80 9010 20 30 40 50 60 70

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0100

ISET PWM FREQUENCY SWEEP

MAX17005 toc05

FREQUENCY (kHz)

CHARGE-CURRENT ERROR (%)

600 700100 200 300 400 500

0.5

1.0

1.5

2.0

2.5

3.0

0 800

DUTY CYCLE = 75%

DUTY CYCLE = 25%

BATTERY VOLTAGE-SETTING ERROR

MAX17005 toc06

VCTL (V)

BATTERY VOLTAGE ERROR (%)

3.0 3.5 4.00.5 1.0 1.5 2.0 2.5

-0.5

-0.4

-0.3

-0.2

-0.1

-0.6

04.5

SYSTEM LOAD TRANSIENT

MAX17005 toc07

200μs/div

SYSTEM CURRENT 5A/div

CHARGING CURRENT 5A/div

INDUCTOR CURRENT 5A/div

EFFICIENCY

vs. CHARGE CURRENT

MAX17005 toc08

CHARGE CURRENT (A)

EFFICIENCY (%)

2.5 3.0 3.50.5 1.0 1.5 2.0

100

04.0

2 CELLS

3 CELLS

4 CELLS

VAA LOAD REGULATION

MAX17005 toc11

LOAD CURRENT (mA)

VOLTAGE (V)

0.80.2 0.4 0.6

4.197

4.196

4.198

4.200

4.199

4.201

4.203

4.202

4.205

4.204

4.195

01.0

MAX17005/MAX17006/MAX17015

1.2MHz Low-Cost, High-Performance Chargers

8 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, V

CTL

= GND, TA= +25°C, unless otherwise noted.)

5.50

5.45

5.40

LDO VOLTAGE (V)

5.35

5.30 040

LDO CURRENT (mA)

3551015202530

MAX17005 toc09

5.50

5.45

5.40

LDO VOLTAGE (V)

5.35

5.30

LDO LOAD REGULATION

LDO LINE REGULATION

826

INPUT VOLTAGE (V)

242210 12 14 16 18 20

HIGH-SIDE MOSFET OFF-TIME AND

4.2005

VAA vs. TEMPERATURE

4.2000

4.1995

4.1990

(V)

4.1985

4.1980

4.1975

4.1970

4.1965

-60 100

TEMPERATURE (°C)

60 80-40 -20 0 20 40

MAX17005 toc12

SWITCHING FREQUENCY vs. BATTERY VOLTAGE

1.6 6 VIN = 20V

1.4

1.2

1.0

0.8

0.6

0.4

SWITCHING FREQUENCY (MHz)

0.2

HIGH-SIDE MOSFET OFF-TIME

018

MAX17005 toc10

SWITCHING FREQUENCY

BATTERY VOLTAGE (V)

MAX17005 toc13

161410 124682

HIGH-SIDE MOSFTE OFF-TIME (μs)

ADAPTER CURRENT

vs. ADAPTER VOLTAGE

1.6

1.4

1.2

1.0

0.8

0.6

ADAPTER CURRENT (mA)

0.4

0.2

020

ADAPTER VOLTAGE (V)

15510

MAX17005 toc14

400

BATTERY LEAKAGE

350

300

250

200

150

100

BATTERY LEAKAGE CURRENT (μA)

020

BATTERY VOLTAGE (V)

14 16 18682 4 10 12

MAX17005 toc15

ADAPTER REMOVAL

200ms/div

MAX17005 toc16

5.00V

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