I am attempting to battery power an atmega328p with a PIR and RFM69 radio and I am wondering if using the step up/down regulator S7V8F3 makes sense. I am going to put the controller and radio sleep and wake them periodically or when the PIR registers motion.
I am trying to understand if you gain more overall battery usage with say, 3 standard AA batteries and the S7V8F3 or powering directly from AA batteries with no regulator.
From how I read the specs and understand how this works, the max quiescent current of the S7V8F3 is less than .1mA even with the regulator always on and without the SHDN pin driven low, correct? If that’s the case its seems the extra 1700 or so mAH plus being able to go down in voltage would net a significant amount of extended battery life.