Help anyone,
I accidentally supplied my laptop "packard bell F0445-U-078 easynote" usb port with 12v supply the laptop wont start i removed the casing and find a burnt IC i think it's a voltage regulator only i cant see the part no.!!! but its an 8 pin soic pin 1,4 is ground, pin 2,3 are tied, pin 6,7,8 are all tied as 5v output supply to USB, i can't trace what pin 5 does, does anybody have idea what type of chip is this?

Yours Truly,
Ryan