This part is a kind of semiconductor called NCP6132B.

Function of this product has Dual Output 3 Phase & 2 Phase Controller.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

NCP6132A, NCP6132B Product Preview Dual Output 3 Phase & 2 Phase Controller with Single SVID Interface for Desktop and Notebook CPU Applications The NCP6132A/NCP6132B dual output three plus two phase buck solution is optimized for Intel IMVP−7 and VR12 compatible CPUs. The controller combines true differential voltage sensing, differential inductor DCR current sensing, input voltage feed−forward, and adaptive voltage positioning to provide accurately regulated power for both Desktop and Notebook applications. The control system is based on Dual−Edge pulse−width modulation (PWM) combined with DCR current sensing providing the fastest initial response to dynamic load events and reduced system cost. It also sheds to single phase during light load operation and can auto frequency scale [ ... ]

NCP6132B PDF Datasheet Download