This part is a kind of semiconductor called BA3906.

Function of this product has Power supply/ standard voltage.

Manufacturers : Rohm

Image and pinout :

Some of the text within the PDF file :

http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com http://www.chipdocs.com [ ... ]

BA3906 PDF Datasheet Download