LTC4065AEDC#TRMPBF

LTC4065A 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, device can be put into shutdown mode, reducing the supply current to less than 20µA. It is used in application such as wireless PDAs, cellular phones, portable electronics etc.

• Charge current programmable upto 750mA with 5% accuracy
• VBAT regulated output voltage is 4.2V typical at (IBAT = 2mA, TA = 25°C)
• ACPR pin indicates presence of input supply, automatic recharge
• Charge current monitor output for gas gauging
• Charges single cell Li-Ion batteries directly from USB port
• Soft-start limits inrush current
• Supply current in shutdown mode is 20µA typical at (TA = 25°C)
• VCC supply voltage range is 3.75V to 5.5V
• Operating temperature is -40°C to 85°C
• Package style is 6-lead plastic DFN

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