This part is a kind of semiconductor called KP1010.

Function of this product has KP1010.

Manufacturers : Cosmo

Image and pinout :

Some of the text within the PDF file :

RT8202L/M Single Synchronous Buck Controller General Description The RT8202L/M PWM controller provides the high efficiency, excellent transient response, and high DC output accuracy needed for stepping down high voltage batteries to generate low voltage CPU core, I/O, and chipset RAM supplies in notebook computers. The constant-on-time PWM control scheme handles wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The RT8202L/M achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current mode PWMs. Efficiency is further enhanced by its ability to drive very large synchronous rectifier MOSFETs. The RT8202L is available in a W [ ... ]

RT8202M PDF Datasheet Download