I've seen some integrated high side switches, but I'll have to look for them. In one product, I was already using some LDO regulators that had an enable pin. So, I just threw in one more and tied the feedback pin to ground. The output went up to Vin- the dropout voltage. This was up in the 12V area, but maybe it could work here. Harold -- FCC Rules Updated Daily at http://www.hallikainen.com - Advertising opportunities available! -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist