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AAD/UTcDQCyyGQBikc0AEItsBoBYZDMAxCKbASCW/wNJs502KSWdUQAAAABJRU5ErkJggg== --Apple-Mail-3-398666577 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed In the attached circuit I've overlaid a standard buck-mode converter (SW2, CR2, L1), and a boost mode converter (SW1, CR1, L1) that shares the same inductor. Is there some reason that this doesn't work as a boost/buck variable voltage regulator? (for boost, you leave SW2 ON continuously, for buck you leave SW1 off all the time.) I don't think I've ever seen this sort of configuration. (for that matter, I haven't seen many switch-mode variable power supplies at all...) I can forsee "issues" trying to run this with a traditional analog feedback path, but if I'm using a microcontroller as the regulating element anyway? Thanks Bill W --Apple-Mail-3-398666577 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --Apple-Mail-3-398666577--