I am looking at buying a AC-DC power supply but I need it to have less than or equal to 3mV p-p ripple on the output. The supply I am looking at is a 5V/20A with 100mV p-p ripple. So if I am going to go with that supply, I am going to need to drop that ripple about -15dB. Does anyone know of a black box solution or product available on the market that can accomplish this? I have looked at the Ripple Attenuator Modules from Vicor but they don't seem to make them anymore. Is there any other company doing this? Alternatively does any on know if there any other power supply companies that offer low noise AC-DC power with my requirements?