This part is a kind of semiconductor called APM4548AK.

Function of this product has Dual Enhancement Mode MOSFET.

Manufacturers : ANPEC

Image and pinout :

Some of the text within the PDF file :

APM4548AK Dual Enhancement Mode MOSFET (N-and P-Channel) Features • N-Channel 30V/7A, RDS(ON) = 18mΩ (typ.) @ VGS = 10V RDS(ON) = 23mΩ (typ.) @ VGS = 4.5V Pin Description • P-Channel -30V/-6A, RDS(ON) = 32mΩ (typ.) @ VGS =-10V RDS(ON) = 42mΩ (typ.) @ VGS =-4.5V Top View of SOP − 8 (8) (7) D1 D1 • • • Super High Dense Cell Design Reliable and Rugged Lead Free and Green Devices Available (RoHS Compliant) (2) G1 (6) (5) D2 D2 Applications • Power Management in Notebook Computer, Portable Equipment, and Battery Powered Systems (4) G2 S1 (1) S2 (3) N-Channel MOSFET P-Channel MOSFET Ordering and Marking Information APM4548A Assembly Material Handling Code Temp. Range Package Code Package Code K : SOP-8 Operating Junction Temp. Range C : -55 to 150 °C Handling [ ... ]

APM4548AK PDF Datasheet Download