Mark Rages wrote:
> You could use a two-resistor voltage divider, possibly followed by an
> op-amp buffer.  You could string three silicon diodes together to drop
> 2.1V.  You could use a slightly-discharged lithium cell. You could
> make a 56% duty cycle square wave, then filter it.  You could connect
> copper and zinc strips and dangle them in two cans of beer.
>
> But a regulator is the right way.

No, it may be the simplest, but you don't have enough information to know
what "right" is.

As just one example, just two resistors might be good enough.  If so, there
are certainly cases where that would be the right answer over a deliberate
LDO.  Considering the lack of useful information provided, even a single
resistor might be good enough.


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