This part is a kind of semiconductor called SM8205AO.

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

Manufacturers : Sinopower

Image and pinout :

Some of the text within the PDF file :

SM8205AO ® Dual N-Channel Enhancement Mode MOSFET Features · 18V/6A, RDS(ON)= 23mW(typ.) @ VGS= 4.5V RDS(ON)= 34mW(typ.) @ VGS= 2.5V · Reliable and Rugged · Lead Free and Green Devices Available (RoHS Compliant) Applications · Power Management in Notebook Computer, Portable Equipment, and Battery Powered Systems. Pin Description D1 S1 S1 G1 D2 S2 S2 G2 Top View of TSSOP - 8 (1) (8) D1 D2 (4) (5) G1 G2 S1 (2) (3) S2 (6) (7) N-Channel MOSFET Ordering and Marking Information SM8205A Assembly Material Handling Code Temperature Range Package Code Package Code O : TSSOP-8 Operating Junction Temperature Range C : -55 to 150 oC Handling Code TR : Tape & Reel (4000ea/reel) Assembly Material G : Halogen and Lead Free Device SM8205A O : SM8205A XXXXX XXXXX - Lot Code Note : SI [ ... ]

SM8205AO PDF Datasheet Download