Quote Originally Posted by Claudio HG View Post
@BuffaloJohn ...well, I'm baffled. Why did you repeat what I've already said in the video?
Your comment makes me worry wondering whether I have troubles in communicating messages, that would void the very reason of making videos.
because you lost me early on ... I couldn't remember all the details because it was confusing and hard to watch, I was watching to learn something, not to review your video. If you take too long to explain something, then I comment and try to explain it simply and quickly.

At minute 7:57 I exactly address the problem of efficiency
8 minutes in...

Using a "cartoon character" was an expedient to convey the concept to people that have not much knowledge in electronics.
It is not an evil concept - unknown is not evil - explain it - and don't pretend it is evil...

Now let's talk about noise. YES switching regulators/power supplies DO GENERATE A LOT OF NOISE !
This is because fast transients contains a large spectrum of high frequencies, and in turn higher radiated electromagnetic interferences.
That's why you need a well designed circuit that stops EMI. With linear regulators you don't have to bother with this problem.
Dealing with the switching transients is really not that hard, I've been doing it for more than 20 years. The chip companies have lots of examples of what to do, complete with sample layouts. Dealing with transients is making the current flow so that it gets back to where it needs to go with as short a loop as possible. Visualising the current path is pretty easy, once you know that the fets and inductor are where the currents start and that the caps are there to make sure that the local current loops have enough storage to supply the energy to run the circuit.

BUT - Switching transients are there for lots of other circuitry as well. Power distribution for the rest of the circuitry also has transients.

Your presentation of noise is just way over hyped, I said it before - it really isn't that hard. Yes, you do need to do more than with a linear regulator, but getting the heat out of the circuit is a far bigger problem, especially when the user buttons up that linear regulator in a box.

You may have mentioned the power dissipation problem, but I gave up on the video and didn't see your thorough explaination of heatsinking.