This part is a kind of semiconductor called ADP3208.

Function of this product has Synchronous Buck Controller.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

7-Bit, Programmable, Dual-Phase, Mobile, CPU, Synchronous Buck Controller ADP3208 FEATURES Single-chip solution Fully compatible with the Intel® IMVP-6+™ specifications Integrated MOSFET drivers Selectable 1- or 2-phase operation with up to 1 MHz per phase switching frequency Guaranteed ±8 mV worst-case differentially sensed core voltage error over temperature Automatic power-saving mode maximizes efficiency with light load during deeper sleep operation Soft transient control reduces inrush current and audio noise Active current balancing between output phases Independent current limit and load line setting inputs for additional design flexibility Built-in power-good blanking supports voltage identification (VID) on-the-fly transients 7-bit, digitally programmable DAC with 0.3 V to 1.5 [ ... ]

ADP3208 PDF Datasheet Download