This part is a kind of semiconductor called BD9701FP.

Function of this product has Simple Step-down Switching Regulators.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

Single-chip Type with Built-in FET Switching Regulator Series Simple Step-down Switching Regulators with Built-in Power MOSFET BD9701F P/CP-V5/T/T-V5, BD9703FP/CP-V5/T/T-V5,BD9702CP-V5/T/T-V5 No.09027EBT01 ●Description The BD9701/BD9703/BD9702 are single-channel step-down switching regulator capable of PWM operation. The Pch MOS FET is built in for high efficiency in small load area.Lower electricity consumption of operating current 4mA (Typ) and stand-by current 0uA(Typ) is realized by adopting Bi-CMOS process. ●Features 1) Maximum switching current: 1.5A(BD9701/BD9703), 3A(BD9702) 2) Built-in Pch FET ensures high efficiency 3) Output voltage adjustable via external resistors 4) High switching frequency: 100kHz (BD9701), 300kHz(BD9703), 110kHz(BD9702) 5) Overcurrent and thermal shu [ ... ]

BD9701FP PDF Datasheet Download