This part is a kind of semiconductor called BD9775FV.

Function of this product has High-efficiency Switching Regulators.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

TECHNICAL NOTE Large Current External FET Controller Type Switching Regulator Step-down, High-efficiency Switching Regulators (Controller type) BD9011EKN , BD9011KV , BD9775FV ■ BD901 1EKN, BD9011KV ●Overview The BD9011EKN/KV is a 2-ch synchronous controller with rectification switching for enhanced power management efficiency. It supports a wide input range, enabling low power consumption ecodesign for an array of electronics. ●Features 1) Wide input voltage range: 3.9V to 30V 2) Precision voltage references: 0.8V±1% 3) FET direct drive 4) Rectification switching for increased efficiency 5) Variable frequency: 250k to 550kHz (external synchronization to 550kHz) 6) Built-in selected OFF latch and auto remove over current protection 7) Built-in independent power up/power down sequen [ ... ]

BD9775FV PDF Datasheet Download