Does anyone have a circuit to protect CMOS ICs against the possibility of a short circuit occuring in the regulator? (I once had to replace an expensive mico controller in my nephew's audio system because the 7805 had gone S/C and destroyed it)
I don't want to have to re-invent the wheel. I did a brief search of these forums, but found nothing.
I know about crowbar circuits and once designed one for an 8V supply, but I'm looking for other options. For example, it could be done with a series transistor on the unregulated side. There would be a voltage sensor on the regulated side that senses when the 5 Volt rail is rising and thus turns off the transistor.
There would have to be a memory of some sort, eg. an SCR to keep the transistor off.