Electronic – why don’t we see more snubbers in schematics

emcnoisesnubberswitch-mode-power-supply

Introduction

Let me start by saying that I know what a snubber is and how to implement one. I learnt how to use them when developing power electronics. Needed to reduce EMI in switchers, but they are even more needed in order to not have exploding power FET's. Also often a trade-of between clean and efficient.

Example

So while being aware of the usefulness of snubbing, I was thinking about a filtering schematic that is used often in one way or another:

power supply -> Pi filter -> buck converter for point of load supply.

In the schematic below it's represented with a ferrite bead equivalent on the left hand side and input cap of buck on the right hand side, with an equivalent load of the buck of 1.5W on 12V supply rail. There's the 1nH inductor in between to represent a PCB track.
Just look at the terrible 20dB peak, smack in the middle of the audio band. I wouldn't like anything like that feeding audio circuitry.
without snubbing

Add 2 snubbers and look how clean it can be:
with snubbing

Question

Other than accross switching elements with parasitic capacitance (mostly FET's and diodes), I don't ever see mentioning of snubbers. Why is that? Am I overcomplicating things, being paranoid, or do I have a blind spot somewhere that would render the snubbers in above example useless?

Best Answer

They're referred to as damping components in this context, not snubbers. I assume because in power switching you're dealing with inductive kick from interrupting current, whereas in signal applications you're dealing with resonant peaking.

https://www.analog.com/en/analog-dialogue/articles/ferrite-beads-demystified.html