When I checked 'the numbers', which I, of course, did, they were way beyond satisfactory.

As opposed to the practice in the Erlacher lab, we verify that our design is beyond satisfactory and hold that for enough of a qualifier.

I have no intention whatsoever to go in and remeasure anything just to satisfy the curiousity of a certain Mr. Erlacher.

Your original question was, as I hinted, utterly stupid. What is the ripple? that of course depend on your filtering, The 'raw' ripple is totally irrelevant, more 'raw' ripple - more filtering, less 'raw' ripple - less filtering, the result is the same. Do you REALLY want me to experiment with different filtering just to satify you?

Also the question about power off was identically stupid. Whatever regulation you use, at power off, you empty the resevoir, whatever kind of regulation you have.

If you want to get numbers buy a PowerTrends switcher (they are very good) and start experimenting, it seems you like 'experimenting' whether there is a reason to or not.

Now a footnote:
I inherited a 'homemade' switcher, what a piece of (word omitted to keep post from being moderated out) and after replacing several thousand boards with an otherwise identical board with a PowerTrends switcher the problems went away. Note 'the problems' had avalance effect and the typical warranty repair was in the $1000 range.

My experience tells me that anything with a switcher that is 'designed' by someone without years of experience in switcher design will be a load of .... . Thus if your comments on switchers are based on your designs they are, in my opinion, invalid. Nothing personal, see above.

Erik