Hmm... ok, ignore that suggestion (well mostly)...  current limit is=20
abysmally low at higher voltage differences.   The (mostly) refers to=20
the fact that you may be able to add an external power transistor, and=20
that although the 317HV might not work for you, it would not surprise me=20
if there isn't another linear and/or LDO which will, especially=20
considering the very short duty cycle.

On a related note, some regulators which at first glance won't work, may=20
work just fine.   For instance, the LM317 series is rated based on=20
input-output differential.   So with a 12V output, a normal LM317=20
(non-hv) effectively can have a 52V input and 12V output.   Of course,=20
with that horrible current limit as well....

-forrest

On 7/27/2011 2:01 AM, Forrest Christian wrote:
> Quick, dirty, easy:   LM317HV.  (or the LM117HV if you need wider
> operation range).
>
> -forrest
>
>

--=20
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