XC5071

XC5071 _______________________________________________________ XC5071- 600mA Linear Li-Ion Battery Charger GENERAL DESCRIPTION The XC5071 is a complete constant current & constant voltage linear charger for single cell lithium-ion batteries. Its SOT package and low external component count make the XC5071 ideally suited for portable applications. Furthermore, the XC5071 is specifically designed to work within USB power specifications. No external sense resistor is needed, and no blocking diode is 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. The charge voltage is fixed at 4.21V, and the charge current can be programmed externally with a single resistor. The XC5071 automatically terminates the charge cycle when the charge current drops to 1/10th the programmed value after the final float voltage is reached. When the input supply (wall adapter or USB su...