Description

The SD8054 is a complete constant-current/ constant voltage linear charger for single cell

lithium-ion batteries. Its package and low e xternal component count make the SD8054 i deally suited for portable applications. Furthe rmore, the SD8054 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 4.2V, and the charge current can be

programmed externally with a single resistor.

The SD8054 automatically terminates the