> Looks like SEPIC converter can be a good candidate here if no > transformer isolation is necessary. Just google for "SEPIC Converter" > and there will be many links. The MAX668 looks good http://www.maxim-ic.com/quick_view2.cfm/qv_pk/1901 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist