Given that I have 24 vdc, I want a supply adjustable from +1V to +100. Stable, quiet, current limited. Roughly 10 watts out. I might want several of these on a board, with independently programmable voltage. Multi-channel pulse generator.
There are boost-buck chips around, but not to 100v, probably not very quiet. This might be demanding for a sepic, too.
I was thinking that I could put a boost converter ahead of a linear regulator. The boost output wouldn't go below 24ish, but that's ok... the linear can work from that. I guess the boost output would always stay 10 volts or so ahead of what the linear needs, kind of like the trick of bootstrapping an LM317.