I am using a simple buck switching converter (AP3211) to convert 5V-12V to 3.3V.
The issue I am trying to resolve is the output ringing. I see a 800mV P-P ringing on the output, with a frequency of 185MHz. I've read details that I could possibly use an RC snubber to reduce the ringing.
Some references I found:
The schottky diode has a Junction Capacitance of 120pF. A few different articles have a slightly different approach to calculate the R and C values for the snubber, however I've come to the following values:
R = 7 Ohm C = 270 pF
My question is: If I don't care about power consumption (to an extent, and not enough to use a linear regulator), could I use lower R and higher C to reduce the ringing even further? If so, what are suitable values for R and C?