I mostly use generic (no specific manufacturer) components, > so I can't check their datasheets. So: what are typical ESR values for > off-the-shelve elco's (and if they are not likely to meet such > requireents, of tantaliums)? I used to use generics, but with these regs, I pick a specific part, usually from digikey, to match, and I pad in a series resistor position in case I need to "fix" it. If I was making bunches, then I'd drop the series resistor, since it would be less likely that I'd have to face parts extinction. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist