>Yes. I mentioned a SEPIC as one of the options. The two >inductors is annoying but not necessarily a killer. And >it needs a semi formal controller, unlike some options. have you looked at the recently introduced 16F series device designed for power supply use? 16F785 IIRC. I do not know what its own power supply rating is, but considering the supposed end use it might go up to the 6V range. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist