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MAX8568A

Complete Backup-Management ICs for Lithium and NiMH Batteries

Maxim Integrated 

Complete Backup-Management ICs

for Lithium and NiMH Batteries

ABSOLUTE MAXIMUM RATINGS

IN, BK, BKSU, OD1, OD2 to GND.........................-0.3V to +6.0V

BKV, LDO, NI/LI to GND.........................-0.3V to (VBKSU + 0.3V)

REF, CHGI, INOK, TERMV, STRTV to GND...-0.3V to (VIN + 0.3V)

PGND to GND ......................................................-0.3V to + 0.3V

LX Current ......................................................................0.9ARMS

Continuous Power Dissipation (TA = +70°C)

16-Pin 3mm x 3mm Thin QFN

(derate 15.6mW/°C above +70°C) .............................1250mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°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.

ELECTRICAL CHARACTERISTICS

(Circuit of Figure 7, VIN = VINOK = 3.6V, VBK = 1.4V, VNI/LI = VBKSU = 3.3V, VBKV = GND = PGND = 0V, VSTRTV = VTERMV = 1.2V,

R5 = 250kΩ, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)

PARAMETER

IN Voltage Range

IN Operating Current

CHGI Current Limit

CHGI Bias Voltage

CHGI Resistor Range

BK Charge Voltage Limit

BK Reverse Leakage Current to IN

NiMH Mode BK High Threshold Voltage,

VBK(NIHI)

NiMH Mode BK Low Threshold Voltage,

VBK(NILO)

TERMV Input Current

STRTV Input Current

REF Output Voltage

REF Load Regulation

REF Line Regulation

INOK Threshold Voltage

INOK Input Current

NI/LI Logic-Level High

NI/LI Logic-Level Low

CONDITIONS

Charger off, VINOK = 1.5V

TA = +25°C

TA = +85°C

Charger on, not including charge current

RCHGI = 169kΩ, VBK = 1.3V

VBK = 1.3V

VIN = 5.5V, VNI/LI = 0V

VIN = 3.8V, VNI/LI = 0V, VTERMV = 1V

VIN = VNI/LI = 3.6V

VIN = 0V

TA = +25°C

TA = +85°C

VTERMV = 1.2V

MIN

2.8

8

50

4.116

3.42

1.746

1.37

TYP

3

3

50

10

600

4.2

3.5

1.8

0.01

0.1

1.4

MAX

5.5

5

90

12

1800

4.284

3.58

1.854

0.5

UNITS

V

µA

mA

mV

kΩ

V

µA

1.43

V

VSTRTV = 1.2V

1.17

1.2

1.23

V

VTERMV = 1.1V

TA = +25°C

TA = +85°C

0.001 0.05

µA

0.01

VSTRTV = 1.1V

TA = +25°C

TA = +85°C

0.001 0.05

µA

0.01

IREF = 1µA

1.23 1.25 1.27

V

IREF = 1µA to 50µA

2.5

10

mV

VIN = 3V to 5.5V, IREF = 1µA

1

7

mV

VINOK falling

VINOK rising

2.38 2.43 2.48

V

2.40 2.47 2.54

VINOK = 2V

TA = +25°C

TA = +85°C

0.005 0.1

µA

0.05

VBKSU = 3.3V

1.8

V

VBKSU = 3.3V

0.4

V

2 _______________________________________________________________________________________

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