I need a boost converter to convert 2 AA batteries to 5 volts at 100 ma or so. Does anyone have a favorite chip? Efficiency is not critical, regulation is not critical. I would like to be able to drain the AAs to .9 volts, so1.8 volt minimum input voltage would be nice, though I'd settle for 2.0, or even 2.2 if nothing better is available. Thanks for any assistance.