This part is a kind of semiconductor called APM9926C.

Function of this product has N-Channel Enhancement Mode MOSFET.

Manufacturers : Etc

Image and pinout :

Some of the text within the PDF file :

APM9926/C N-Channel Enhancement Mode MOSFET Features • • • • 20V/6A , RDS(ON)=28mΩ(typ.) @ VGS=4.5V RDS(ON)=38mΩ(typ.) @ VGS=2.5V Super High Dense Cell Design for Extremely Low RDS(ON) Reliable and Rugged SO-8 and TSSOP-8 Packages Applications • Power Management in Notebook Computer , Portable Equipment and Battery Powered Systems. Pin Description APM9926 S1 G1 S2 G2 1 2 3 4 8 7 6 5 D1 D1 D2 D2 D1 S1 S1 G1 1 2 3 4 8 7 6 5 D2 S2 S2 G2 S1 G1 S2 G2 1 2 3 4 8 7 6 5 APM9926C D D D D D S1 S1 G1 1 2 3 4 8 7 6 5 D S2 S2 G2 SO-8 D1 D1 TSSOP-8 D1 SO-8 D TSSOP-8 D G1 G1 G1 G1 S1 S1 S1 D2 S1 D S1 D S1 D2 D2 G2 G2 G2 G2 S2 S2 S2 S2 S2 S2 ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise custome [ ... ]

APM9926C PDF Datasheet Download