[TriEmbed] How to Damage an LDO

Carl Nobile carl.nobile at gmail.com
Thu Dec 10 12:33:23 CST 2015


Brian,

The diode I mentioned would be in series with the 5v coming out of the
regulator and using a Schottky diode would keep down the voltage drop
caused by the diode. But, as you say the question is mute at this point
anyhow.

~Carl


On Thu, Dec 10, 2015 at 1:19 PM, Brian via TriEmbed <triembed at triembed.org>
wrote:

> Pete,
>
> Thank you for your detailed response.  However, there's a disconnect
> between what you and others have described and my situation.
>
> The issue is that floating != zero volts.
>
> A backwards diode across Vin/Vout on a regulator won't do anything if Vin
> is floating.
>
> A forwards Schottky on Vout would at least be functional, but the voltage
> drop (combined with the current requirements of the circuit -- 1 A!) is a
> concern.
>
> It is actually academic at this point because, having finalized the
> enclosure design, I've determined that there is no room for batteries!
>
> (It's a doodad I'm making for a friend; said friend will just have to deal
> with the wall wart)
>
> Thanks nonetheless!
> -Brian
>
>
>
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>



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Carl J. Nobile (Software Engineer)
carl.nobile at gmail.com
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