On 16/01/2021 20:09, David Higton wrote:
> Using an inductor in a conventional step-down switching regulator is
> much more efficient, and of course requires the inductor to store
> energy.
>

No, it doesn't have to store ALL the energy - like it does in a step up

And if you don't mind massive ripple, it isn't needed *at all*.
Consider a 6V battery deeding a 3V lamp. Simply chop the 6V on a 50%
duty cycle and there you are. No choke needed at all.

Add an LC filter and the cap stores all that is necessary. All the L
does is limit the peak current into the C.



--
There is something fascinating about science. One gets such wholesale
returns of conjecture out of such a trifling investment of fact.

Mark Twain

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