Without knowing the characteristics that the switcher requires, it's going to be hard to suggest another capacitor. Have you looked at other suitable switchers? Higher frequency switchers sometimes require smaller capacitances, not to mention smaller coils, etc. -Adam On 4/29/06, Picdude wrote: > I'm going to resurrect my 78xx-switcher project. In this case, 78SW05 -- a small switcher circuit that will be a drop-in for a 7805, and NOT requiring external caps. So far, I have designed it for 0.5A, since that's well within what I'm using it for. > > Although it is functional, I want to find smaller caps to replace the SMD alum electrolytic cans on there now. But so far there is a significant cost increase for these. SMD tantalums are expensive and SMD ceramics are ridiculously expensive, especially when we're looking at 25V caps (for the input cap). So far, I'm seeing $5-ish in 100-pc quantities. > > Any other types I can use to replace these? > > This is the current version btw... > http://www.narwani.net/neil/electronics/78SWxx/78SW05_Size_Comparison_2.jpg > http://www.narwani.net/neil/electronics/78SWxx/78SW05_Size_Comparison_3.jpg > > Cheers, > -Neil. > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist