> All the other devices are fine with a brief (or even not
> so brief) excursion to 5.5V for programming and
> verification.  So what is the best way to protect my
> regulator?  Three options spring to mind:

note: when your nominal operating voltage is 3V it makes no sense and
there is no need to verify at 5.5V. IIRC 4.5 is required for some
programming aspects (chip erase?) but not more.

How about a reverse (schottky?) diode over the regulator, maybe with a
series resistor at the input of the regulator?

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
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docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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