Recently, I've made a little PCB that holds the ATmega168 along with the switching circuit LadyAda uses in the MintiBoost. (http://ladyada.net/make/mintyboost/process.html) It runs fine on 2xAA NiMH batteries. (Note, there is no voltage regulator on this board.)
However, I'm concerned about what may happen to the ATmega when the battery and the switcher output falls to low voltage levels. (I think I may have lost the bootloader on one chip this way.)
I've researched a bit on "low voltage cut outs", and looked at the MAX8211, however, I was wondering if anyone has some thoughts on:
a.) the need to even worry about this b.) the easiest way to do this if I should worry
I was also wondering that if, when the cut out threshold is reached, I could simply pull the Reset pin low, rather than switching off power completely? This way, I would only protect the ATmega.
Any advice is appreciated.