[TriEmbed] How to Damage an LDO

Brian lugmail at cheetah.dynip.com
Tue Dec 8 16:36:44 CST 2015


If a linear voltage regulator sees its nominal output voltage across its 
GND/OUT pins while its IN pin floats, is it going to be damaged?

For example, a 7805 regulating a 9 volt battery, but the battery is 
disconnected and an AC adaptor is supplying 5 volts.

This seems like a thing I should /just know/, but I can't figure out a 
good way to google for it, or to divine it from a datasheet.

-Brian (one of many)

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