DESCRIPTION
The LTC®4050-4.1/LTC4050-4.2 are complete standalone constant-current/constant-voltage linear charge controllers for lithium-ion (Li-Ion) batteries. Charge current is programmable and final float voltage has ±1% accuracy.

FEATURES
■ Complete Standalone Linear Charger Controller for 1-Cell Lithium-Ion Batteries
■ Thermistor Interface for Battery Temperature Sensing
■ Preset Charge Voltage with ±1% Accuracy
■ Programmable Charge Current
■ C/10 Charge Current Detection Output
■ Programmable Charge Termination Timer
■ Input Supply (Wall Adapter) Detection Output
■ 4.5V to 10V Input Voltage Range
■ Automatic Sleep Mode When Input Supply is Removed (Only 5µA Battery Drain)
■ Automatic Trickle Charging of Low Voltage Cells
■ Automatic Battery Recharge
■ Battery Insertion Detection
■ Space Saving 10-Pin MSOP Package

APPLICATIONS
■ Cellular Phones
■ Handheld Computers
■ Charging Docks and Cradles