At 09:02 AM 3/6/02 +1100, you wrote:
>"Rick C." wrote:
>
> > A no load condition and a drop in voltage on the input
> > of the78xx will blow it. I have seen some circuits with
> > a diode placed across the 78xx, anode to the output, cathode
> > to the input to protect it.
>
>I've never seen this approach with 78xx regs - interesting. I've only
>seen it with 317 types.
>
>Tony

Just ran across this in a app note a few days ago. I think it was on the
Fairchild or the Phillips site.
It also suggested a couple of caps.

Tried both and didn't notice any difference.

Dave

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