Switch-Mode 1-Cell Li+ Chargers

2

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

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, INP, ACON to GND...........................................-0.3V to +14V

CS, BATT, EN, THRM to GND ..................................-0.3V to +6V

CT to GND ................................................................-0.3V to +4V

EN, THRM, CT to IN................................................-14V to +0.3V

INP to IN ................................................................-0.3V to +0.3V

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

CS to BATT ............................................................-0.3V to +0.3V

EXT Continuous RMS Current.........................................±100mA

Exposed Paddle Soldered to Board

(derate 16.9mW/°C above +70°C) .............................1349mW

Exposed Paddle Unsoldered

(derate 9mW/°C above +70°C) ....................................721mW

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

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage Range

4.5

12.0

V

MAX1925

4.30

4.50

4.78

MAX1926

4.00

4.25

4.50

MAX1925

4.17

4.30

4.43

ACON Trip Point

MAX1926

3.90

4.15

4.40

V

Rising

5.8

6.4

INP, IN Shutdown Threshold

MAX1925

Falling

5.3

5.9

V

EN Input Resistance

MAX1926 internally pulled up to 3V

125

300

550

k

Ω

EN Leakage Current

MAX1925

-1

+1

µA

EN Logic Input High Threshold

2

V

EN Logic Input Low Threshold

0.8

V

25

50

EN = GND (Note 1)

2

10

BATT + CS Input Current

(Total Current into BATT and CS)

2

10

µA

CS Input Current

Charging

39

µA

EN = GND

5

8

mA

2

10

µA

10

IN + INP Total Input Current

5

8

mA

VOLTAGE LOOP

Voltage Loop Set Point

4.1685

4.2000

4.2315

V

Voltage Loop Hysteresis

15

mV

BATT Prequal1 Voltage Threshold

1.9

2

2.1

V

BATT Prequal2 Voltage Threshold

2.85

3

3.15

V