The clock may have to be lowered to something like 1 Mhz. (I assume you would be using the internal clock).Scrap that; the standard version will run at 10Mhz at 2.7volts. You will be fine with the factory default of 8Mhz.
Maybe you could use a diode (cheap) or two. That would give you a voltage drop of 0,7V per diode
Thats the 5v converter converter I'd need..
Voltage drops by 0.7V every time it passes through a normal silicon diode.
It's a good idea to run at 1MHz anyway if it's running on batteries...
QuoteVoltage drops by 0.7V every time it passes through a normal silicon diode.Does the energy of that .7V drop get expended as heat like in a linear regulator? i.e. low efficiency?
There is no heat generated in the diode except the normal resistive losses...