I have a small wall mount switching power supply and it uses a TO-220 IC, It takes the 120V and regulate ~5V via a small transformer. Any clue about what IC could it be? Friendly Regards Octavio Nogueira =================================================== nogueira@propic2.com ICQ# 19841898 ProPic tools - low cost PIC programmer and emulator http://www.propic2.com ===================================================