@exnol: when i simulated the circuits in webench, up to 30mV of noise is observed in the absence of filter at the output, can it be eliminated using filters?, if possible, suggest me with such filter topology
@goldsmith: i heard that a ferrite core inductor-capacitor LC filter could eliminate the switching noise well, could it eliminate 30mV ripple is it a good solution for precision 16bit ADC power supply?
@raza: Your idea is good, but i found the below two problems
1) The ATX supply can't give out enough current on negative supplies.
2) -5V is removed from ATX standard, so, modern ATX supplies are coming without -5V supply.
Thank you all,
please suggest me if any