Datasheet

MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
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Note 1: When the AC adapter is unplugged or if the charger is shut down, BATT drain is less than 10µA.
Note 2: These specifications guarantee the thermistor interface detects a fault at the correct temperature (0°C to +5°C cold temper-
ature and 45°C to +50°C hot temperature) with Philips NTC Thermistor Series 640-6, 2322-640-63103, 10.0K at +25°C, ±5%
(or equivalent).
Note 3: A fault is generated if V
THRM
lower than 1.4V during the cold test or higher than 1.4V during the hot test. Hot and cold tests
occur on alternate CT clock transitions.
Note 4: Specifications to -40°C are guaranteed by design and not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(V
PGND
= V
GND
= 0, V
INP
= V
IN
= V
CHG
= 5V, V
BATT
= V
CS
= V
EN
= 4V, THRM = 10kΩ to GND, C
CT
= 100nF, T
A
= -40°C to +85°C,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 4)
PARAMETER CONDITIONS MIN TYP MAX UNITS
CHG Output High Leakage
Current
V
CHG
= 12V 1 µA
ACON High Leakage V
ACON
= 12V 1 µA
ACON Sink Current V
ACON
= 0.4V 2 mA
THERMISTOR MONITOR
THRM Sense Current for Hot
Qualification
342 363 µA
THRM Sense Current for Cold
Qualification
47.3 50.3 µA
THRM Sense-Voltage Trip Point (Note 3) 1.379 1.421 V