On 03/06/2011 23:47, V G wrote: > It does come in TSOT versions, but those specific ones are voltage locked > (for example, to 3.3V). That's no good, because I want to float the Li po > battery at around 3.9V. Ah, I didn't notice that bit. I thought it was odd you had missed it.. Looks like you'll have to have a look on the various manufacturers sites=20 and find another one that does what you want. You could widen your scope depending on what voltage panel you use,=20 maybe you could get away with just a buck or boost depending on your=20 panel. Make sure it will start up properly with whatever voltage/current=20 (under load, check the V/I curve) the panel will provide. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .