XT4059 - natlinear

XT4059 Standalone Linear Li-Ion Battery Charger

The XT4059 is a complete constant-current /constant -voltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the XT4059 ideally suited for portable applications. Furthermore, the XT4059 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no.

Features

include charge current monitor, under-voltage lockout, automatic recharge and a status pin to indicate charge termination and the presence of an input voltage.
■ Typical Application Circuit
■ Features
 Constant-Current/Constant-Voltage
 Charges Single Cell Li-Ion Batteries Directly from USB Port
 Preset 4.2V Charge Voltage with ±1% Accuracy
 Charge Current Monitor Output for Gas Gauging
 Automatic Recharge
 Charge Status Output Pin
 1/10 Charge Termination
 25uA Supply Current in Shutdown
 2.4V Trickle Charge Threshold (XT4059)
 Soft-Start Limits Inrush Current
 Battery reversed pr.