LTC4065LEDC#TRMPBF

LTC4065L is a complete constant-current/constant voltage linear charger for single-cell lithium-ion batteries. Its small size and ability to accurately regulate low charge currents make the device especially well-suited for portable applications using low capacity rechargeable lithium-ion cells. The CHRG pin indicates when charge current has dropped to ten percent of its programmed value (C/10). An internal timer terminates charging according to battery manufacturer specifications. Under these conditions, a reduced float voltage will trade-off initial cell capacity for the benefit of increased capacity retention over the life of the battery. When the input supply (wall adapter or USB supply) is removed, this device automatically enters a low current state, dropping battery drain current to less than 1µA. It is used in application such as charger for Li-Ion coin cell batteries, portable MP3 players, wireless headsets, Bluetooth applications, multifunction wristwatches etc.

• Charge current programmable upto 250mA with 5% accuracy
• No external MOSFET, sense resistor or blocking diode required
• Charge current monitor output for gas gauging
• Automatic recharge, charges single cell Li-Ion batteries directly from USB port
• VCC supply voltage range is 3.75V to 5.5V
• Quiescent VCC supply current is 120µA typ at (VBAT = 4.5V, forces IBAT and IPROG = 0)
• Float voltage is 4.2V
• Charge current range is 8mA to 250mA
• Operating temperature is -40°C to 85°C
• Package style is 6-lead plastic DFN

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party