> > ____ Peltier (1.7ohm) > ----|____|---- > | | > | | > L (100uH) | C1 | L (100uH) > ___ | || | ___ > V1 o---UUU--o-----||-----o--UUU---o V2 > | || | > | | > | | > C2 --- --- C2 > --- --- > | | > ^^^ ^^^ > GND GND Another thing to look at is you inductors - what is the inductance right below maximum current? What will this do to your ripple? Cheers, Bob -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist