LTC4058EDD-4.2#PBF

LTC4058-4.2 is a complete constant-current/constant voltage linear charger for single cell lithium-ion batteries. This device can kelvin sense the battery terminal for more accurate float voltage charging. No external sense resistor or external blocking diode are required due to the internal MOSFET architecture. Thermal feedback regulates the charge current to limit the die temperature during high power operation or high ambient temperature conditions. The charge voltage is fixed at 4.2V and the charge current is programmed with a resistor. It terminates the charge cycle when the charge current drops to 10% of the programmed value after the final float voltage is reached. It is widely used in applications such as cellular telephones, PDAs, MP3 players, Bluetooth applications etc.

• Programmable charge current upto 950mA
• Thermal regulation maximizes charge rate without risk of overheating
• Charges directly from a USB port, C/10 charge termination
• Preset 4.2V charge voltage with ±1% accuracy
• Charge current monitor output for gas gauging, soft-start limits inrush current
• Automatic recharge, charge status output, “AC Present” output
• Input supply voltage from 4.25V to 6.5V, regulated output (float) voltage is 4.2V typ
• Input supply current is 1mA max at (TA = 25°C, VCC = 5V)
• Operating temperature range from -40°C to 85°C
• Package style is 8-lead plastic DFN

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