Hi all. I've been working with the Nat'l LM25XX series of regulator. I've basically taken some of the designs they have in the datasheets and app notes and applied them to my design. I would appreciate your comments on the design. The current problem I'm having is switching noise on the outputs...I can't seem to get rid of it even with the LC filter (it appears that the LC filter has no effect...EMI???). On one of the supplies I built on a perf board I was getting around 1 Vpp of transients and that is way too much for my preamp. I would like to get this down to 50mV or less. Any suggestions?
