Datasheet Linear Technology LTC4001-1

LTC4001-1
2A Synchronous
Buck Li-Ion Charger
FEATURES DESCRIPTION n The LTC®4001-1 is a 2A Li-Ion battery charger intended for
5V wall adapters. It utilizes a 1.5MHz synchronous buck
converter topology to reduce power dissipation during
charging. Low power dissipation, an internal MOSFET and
sense resistor allow a physically small charger that can be
embedded in a wide range of handheld applications. The
LTC4001-1 includes complete charge termination circuitry,
automatic recharge and a ±1% 4.1V float voltage. Input
short-circuit protection is included so no blocking diode
is required. n Low Power Dissipation
2A Maximum Charge Current
No External MOSFETs, Sense Resistor or
Blocking Diode Required
Remote Sensing at Battery Terminals
Programmable Charge Termination Timer
Preset 4.1V Float Voltage with ±0.5% Accuracy
4.1V Float Voltage Improves Battery Life and High
Temperature Safety Margin
Programmable Charge Current Detection/
Termination …