Hi All I've got a MAX762 step-up converter circuit--straight off Maxim's data sheet that won't start oscillating under what should be data sheet approved voltages, parts, etc. If anyone has direct experience with this part, I'd sure like to hear from you--off list is fine. Give me a phone number, and I'll call with the details. Kelly -------------------------------------------------------------------------------------------------------- Just Switched to Cable-Net. If you get duplicate messages, please let me know asap. William K. Borsum, P.E. -- OEM Dataloggers and Seismic Instrumentation Systems & San Diego, California, USA