Maxim Integrated MAX17005B, MAX17006B, MAX17015B Datasheet

General Description

The MAX17005B/MAX17006B/MAX17015B 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 MAX17015B, this current monitor remains active
when the adapter is absent to monitor battery dis­charge current.

The MAX17005B charges three or four Li+ series cells,
and the MAX17006B charges two or three Li+ series
cells. The MAX17015B 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 MAX17005B/MAX17006B/MAX17015B 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

(MAX17015B Only)

AC Adapter Detection

♦ Analog/PWM Adjustable Charge-Current Setting

♦ Battery Voltage Adjustable for 3 and 4 Cells

(MAX17005B) or 2 and 3 Cells (MAX17006B)

♦ 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

MAX17005B/MAX17006B/MAX17015B

1.2MHz, Low-Cost,

High-Performance Chargers

________________________________________________________________

Maxim Integrated Products

1

Ordering Information

19-4576; Rev 1; 7/09

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.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

**EP = Exposed pad.

PART TEMP RANGE PIN-PACKAGE

MAX17005BETP+ -40°C to +85°C 20 TQFN-EP**

MAX17006BETP+ -40°C to +85°C 20 TQFN-EP**

MAX17015BETP+ -40°C to +85°C 20 TQFN-EP**

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

EVALUATION KIT

AVAILABLE

MAX17005B/MAX17006B/MAX17015B

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

A

= +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, CC to AGND .....................-0.3V to (V

AA

+ 0.3V)

V

AA

, LDO, ISET, VCTL to AGND .............................-0.3V to +6V

DHI to LX...................................................-0.3V to (V

BST

+ 0.3V)

BST to LX..................................................................-0.3V to +6V

DLO to PGND ...........................................-0.3V to (V

LDO

+ 0.3V)

PGND to AGND .................................................... -0.3V to +0.3V

Continuous Power Dissipation (T

A

= +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

PARAMETER CONDITIONS MIN TYP MAX UNITS

CHARGE-VOLTAGE REGULATION

Battery Regulation-Voltage Accuracy

FB Input Bias Current -1 +1 µA

VCTL Range

VCTL Gain V

VCTL Input Bias Current V

CHARGE-CURRENT REGULATION

ISET Range 0 VAA/2 V

ISET Full-Scale Setting

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

2 cel ls, V

3 cells, V

4 cel ls, V

= V

VCTL

= VAA (MAX17005B/MAX17006B) 12.549 12.60 12.651

VCTL

= V

VCTL

FB accuracy using FB divider (MAX17015B)
(Note 1)

2 cells (MAX17006B), 4 cells (MAX17005B) 0

3 cells (MAX17005B/MAX17006B)

CELL/VVCTL

VCTL

5.85 6 6.15 V/V

= V

and VCTL = V

AGND

ISET = 1.4V 80

ISET = 99.9% duty cycle 60

= 1V to 16.8V

V

BATT

= V

ISET

= V

ISET

ISET falling 21 26 31

ISET rising 33 40 47

(MAX17006B) 8.3664 8.40 8.4336

AGND

(MAX17005B) 16.733 16.80 16.867

AGND

2.0916 2.1 2.1084

VAA

VAA

AA

V

= VAA/4 or ISET

ISET

= 99.9% duty cycle

V

= VAA/6 or ISET

ISET

= 66.7% duty cycle

V

= VAA/80 or ISET

ISET

= 5% duty cycle

/4 and V

/4 and V

ISET

ISET

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 %

= V

/80 -2 +2 %

VAA

= V

/80 -1.4 +1.4 mV

VAA

V

V

AA

- 0.2

AA

/2

V

V

mV

mV

MAX17005B/MAX17006B/MAX17015B

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

A

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

ISET Input Bias Current

ISET PWM Threshold

ISET Frequency 0.128 500 kH z

ISET Effecti ve Resolut ion f

INPUT-CURRENT REGULATION

Input Current-Limit Thresho ld V

CSSN Input Bias Current Adapter present at TA = +25°C -1 +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
(Note 2)

BATT + CSIP + CSIN + LX Input Current
(Note 2)

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 Lea kage Current V

V

ISET

CSSN = BATT, V

Ri sing 2.4

Fal ling 0.8

PWM

CSSP

CSSP

V

CSSP

V

CSSP

DCIN falling 7.9 8.1

DCIN rising 8.7 8.9

Adapter present 3 6 mA

Adapter absent 30 50 µA

V

BATT

V

BATT

VAA

ACOK

ACOK

= 3V -0.2 +0.2

= 1.6MHz 8 Bits

- V

CSSN

- V

CSSN

- V

CSSN

- V

CSSN

= 16.8V

= 2V to 19V, adapter present 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

ACIN

= 5V -0.2 +0.2

= 0 to 4.5V -2.5 +2.5

IINP

Adapter absent 10 20

Charger shutdown 10 20

= 1.5V 6 mA

= 2.5V 1 µA

58.5 60 61.5 mV

-2.5 +2.5 %

µA

%

µA

V

V

MAX17005B/MAX17006B/MAX17015B

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

A

= +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 TYP 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 C harge-Pump Frequency Charger shutdown 180 200 220 Hz

Adapter Switch Charge-Pump Refresh Pulse

DCIN

V

CSIP

CSIP

CSIP

DLO

DLO

DLO

DLO

DCIN

DCIN

DLO 0.04 0.1 0.20

DHI 0.07 0.15 0.30

= 19V, V

- V

CSIN

- V

CSIN

- V

CSIN

= 10V 0.029 0.035 0.041 µs/V

BATT

10 mV

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

µs

PARAMETER CONDITIONS MIN TYP MAX UNITS

CHARGE-VOLTAGE REGULATION

Battery Regulation-Voltage Accuracy

VCTL Range

VCTL Gain V

2 cel ls, V

3 cel ls, V

4 cel ls, V

VCTL

VCTL

VCTL

= V

AGND

(MAX17006B) 8.366 8.433

= VAA (MAX17005B/MAX17006B) 12.549 12.651

= V

(MAX17005B) 16.73 16.86

AGND

FB accuracy using FB divider (MAX17015B)
(Note 1)

2 cells (MAX17006B),
4 cells (MAX17005B)

3 cells (MAX17005B/MAX17006B)

CELL/VVCTL

5.85 6.15 V/V

2.091 2.108

V
+ 0.2

V

/2

AA

- 0.2

V

AA

AA

0

/2

V

V

MAX17005B/MAX17006B/MAX17015B

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 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 kH z

INPUT-CURRENT REGULATION

Input Current-Limit Thresho ld 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
(Note 2)

BATT + CSIP + CSIN + LX Input Current
(Note 2)

LDO Output Voltage 8.0V < V

LDO Load Regulation 0 < I

LDO UVLO Threshold 3.2 5.0 V

V

ISET falling 21 31

ISET ris ing 33 47

Ri sing 2.4

Fal ling 0.8

V

V

DCIN falling 7.9

DCIN rising 8.9

= 1V to 16.8V

BATT

- V

CSSP

CSSP

CSSP

CSSP

- V

- V

- V

CSSN

CSSN

CSSN

CSSN

ISET

ISET

= V

= V

V

= VAA/4 or

ISET

ISET = 99.9% duty cycl e

V

= VAA/6 or

ISET

ISET = 66.7% duty cycl e

V

= VAA/80 or

ISET

ISET = 5% duty cycle

VAA

VAA

/4 and V

/4 and V

ISET

ISET

= V

= V

57.5 62.5 mV

-4.2 +4.2 %

38 42 mV

-5 +5 %

1.4 4.6 mV

-52 +52 %

/80 -2 +2 %

VAA

/80 -1.4 +1.4 mV

VAA

58.2 61.8 mV

-3 +3 %

= 60mV 2.66 2.94 µA/mV

= 60mV, V

= 0 to 4.5V -2.5 +2.5

IINP

= 35mV -2.5 +2.5

mV

V

%

V

Adapter present 6 mA

Adapter absent 50 µA

V

= 16.8V

BATT

V

= 2V to 19V, adapter present 500

BATT

DCIN

< 40mA 200 mV

LDO

Adapter absent 20

Charger shutdown 20

µA

< 26V, no load 5.15 5.55 V

MAX17005B/MAX17006B/MAX17015B

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

V

DCIN

= 16V, V

BATT

= 16.8V.

PARAMETER CONDITIONS MIN TYP MAX UNITS

REFERENCES

VAA Output Voltage I

VAA UVLO Thresho ld VAA falling 3.9 V

ACIN

ACIN Thresho ld 2.058 2.142 V

ACIN Thresho ld 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 C harge-Pump Frequency 180 220 Hz

Adapter Switch Charge-Pump Refresh Pulse

VAA

DLO

DLO

DLO

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

MAX17005B/MAX17006B/MAX17015B

1.2MHz, Low-Cost,

High-Performance Chargers

_______________________________________________________________________________________ 7

Typical Operating Characteristics

(Circuit of Figure 1, adapter = 19V, battery = 10V, ISET = 1.05V, VCTL = AGND, TA= +25°C, unless otherwise noted.)

IINP DC ERROR

vs. SYSTEM CURRENT

MAX17005B toc01

SYSTEM CURRENT (A)

IINP ERROR (%)

4312

-8

-6

-4

-2

0

2

4

6

8

10

-10
05

IINP ERROR

vs. SYSTEM CURRENT

MAX17005B toc02

SYSTEM CURRENT (A)

IINP ERROR (%)

4.03.52.5 3.01.0 1.5 2.00.5

-8

-6

-4

-2

0

2

4

6

8

10

-10

04.5

V

BATT

= 16.8V

V

BATT

= 8.4V

V

BATT

= 12.6V

ISET PWM DUTY-CYCLE CHANGE

MAX17005B 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

0

01.0

ISET PWM DUTY-CYCLE CHANGE

MAX17005B 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

0

0100

ISET PWM FREQUENCY SWEEP

MAX17005B 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

0 800

DUTY CYCLE = 75%

DUTY CYCLE = 25%

BATTERY VOLTAGE-SETTING ERROR

MAX17005B 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

-0.6

04.5

SYSTEM LOAD TRANSIENT

MAX17005B toc07

200µs/div

SYSTEM
CURRENT
5A/div

CHARGING
CURRENT
5A/div

INDUCTOR
CURRENT
5A/div

EFFICIENCY

vs. CHARGE CURRENT

MAX17005B toc08

CHARGE CURRENT (A)

EFFICIENCY (%)

2.5 3.0 3.50.5 1.0 1.5 2.0

70

65

75

80

85

95

90

100

60

04.0

2 CELLS

3 CELLS

4 CELLS