DESCRIPTION
The LTC4064 is a standalone linear charger optimized for prolonging the life of 1-cell Li-ion batteries in battery backup applications. By charging to a float voltage of 4V instead of 4.2V or 4.1V, the LTC4064 decelerates the aging process and capacity degradation when the battery is unused for long periods of time but must be in a ready state.

FEATURES
■ Preset 4V Charge Voltage with 1% Accuracy Prolongs 4.2V Li-Ion Battery Lifetime
■ Automatic Recharge
■ Thermal Regulation Maximizes Charging Rate without Risk of Overheating*
■ No MOSFET, Sense Resistor or Blocking Diode Required
■ Programmable Charge Termination Timer
■ Thermistor Input for Temperature Qualified Charging
■ Programmable Charge Current with 7% Accuracy
■ C/10 Charge Current Detection Output
■ 25µA Supply Current in Shutdown Mode
■ Charge Current Monitor Useful for Gas Gauging*
■ Charges Directly from USB Port
■ Tiny Thermally Enhanced 10-pin MSOP Package

APPLICATIONS
■ File Servers, RAID Systems
■ Storage Products
■ Li-Ion Battery Back-Up