MAX1925 datasheet(2/16 Pages) MAXIM

2 / 16 page

Switch-Mode 1-Cell Li+ Chargers

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VPGND = VGND = 0, VINP = VIN = VCHG = 5V, VBATT = VCS = VEN = 4V, THRM = 10k

Ω to GND, CCT = 100nF, 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.

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

CHG, EXT to PGND ...................................-0.3V to (VINP + 0.3V)

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

Continuous Power Dissipation (TA = +70°C)

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

VINP, VIN (MAX1925 does not charge above 6.1V)

4.5

12.0

MAX1925

4.30

4.50

4.78

VINP, VIN rising

MAX1926

4.00

4.25

4.50

MAX1925

4.17

4.30

4.43

ACON Trip Point

VINP, VIN falling

MAX1926

3.90

4.15

4.40

Rising

5.8

6.4

INP, IN Shutdown Threshold

MAX1925

Falling

5.3

5.9

EN Input Resistance

MAX1926 internally pulled up to 3V

125

300

550

Ω

EN Leakage Current

MAX1925

-1

µA

EN Logic Input High Threshold

EN Logic Input Low Threshold

0.8

DONE state, VBATT = 4.1V

EN = GND (Note 1)

BATT + CS Input Current

(Total Current into BATT and CS)

VBATT = VINP = VIN = 4V, shutdown (Note 1)

µA

CS Input Current

Charging

µA

EN = GND

VBATT = VINP = VIN = 4V, shutdown

µA

VBATT = 4.1V; charging

IN + INP Total Input Current

VBATT = 4.3V; done

VOLTAGE LOOP

Voltage Loop Set Point

4.1685

4.2000

4.2315

Voltage Loop Hysteresis

BATT Prequal1 Voltage Threshold

1.9

2.1

BATT Prequal2 Voltage Threshold

2.85

3.15

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