DESCRIPTION
The A4001 battery protection IC is designed to
protect lithium ion/polymer battery from damage or
degrading the lifetime due to overcharge, over
discharge, and/or overcurrent for one cell
lithium ion polymer battery powered systems, s uch
as cellular phones
The ultra
small package and less required external
components make it ideal to integrate the A4001
into the limited space of battery pack. The accurate
50mV overcharging detection voltage ensures safe
and full utilization charging. T he very low standby
current drains little current from the cell while in
storage
The A4001 is available in SOT-26 package.

FEATURES
 Reduction in Board Size due to Miniature
 Ultra Low Quiescent Current at 3uA
 Ultra Low Power down Current at 0.1uA
 Precision Overcharge Protection Voltage
4.3V+50mV for the A4001
 Load Detection Function during Overcharge
Mode
 Two Detection Levels for Overcurrent Protection
 Delay times are generated by internal circuits. No
external capacitors required
 Available in SOT-26 Package

APPLICATION
 One-Cell Lithium-ion Battery Pack
 Lithium-Polymer Battery Pack