[TriEmbed] How to Damage an LDO

[Brian]

Hi,

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.



Thanks!
-Brian (one of many)