LTC4065EDC#TRMPBF

LTC4065 is a complete constant-current/constant voltage linear charger for single-cell lithium-ion batteries. It is specifically designed to work within USB power specifications. 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. No external sense resistor or blocking diode is required due to the internal MOSFET architecture. Thermal feedback regulates charge current to limit the die temperature during high power operation or high ambient temperature conditions. 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. With power applied, it can be put into shutdown mode, reducing the supply current to less than 20µA. It is used in applications such as wireless PDAs, cellular phones, portable electronics etc.

• Charge current programmable upto 750mA with 5% accuracy
• Preset 4.2V float voltage with 0.6% accuracy
• Charge current monitor output for gas gauging, automatic recharge
• Charges single cell Li-Ion batteries directly from USB port
• Soft-start limits inrush current
• VCC supply voltage is 3.75V to 5.5V
• Quiescent VCC supply current is 120µA typical at (VBAT = 4.5V, forces IBAT and IPROG = 0)
• 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