>
>You mean something like: We trickled through inefficiency from series
>dropping resistor, to switchers being more efficient / needing a LARGE
>inductor / not if you use them in pulsed /discontinuous mode/ good idea!/
>aside on resonant converters / only need a few uA average / telco allows 10
>uA leakage /that should be enough / Ok.
>
>Nah. Get real. Nobody's going to give you that :-)

VBG.  Maxim does/did make a buck switcher specifically for this.
I don't remember the PN though, I always did my own in discretes.

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