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Dual-supply design from phantom power

Question asked by JeradL on Jun 18, 2012
Latest reply on Jun 25, 2012 by JeradL

I'm working on a microphone design that I'd like to run off of phantom power (+42 V dc, up to 14 mA available). My circuit will need two different voltage rails. Some of the components, such as the MEMS microphones, will run from 1.8 to 3.3 V and will draw 5-10 mA. The second supply rail, for opamps and an audio line driver (SSM2142), should be between +/-10 to +/-18 V and will draw 10-15 mA. Do you have a suggestion for designing the power supply for this design? I didn't see a part that works directly off of a +42 V input.