I am considering a low power design where I do not use a regulator.
- The components will operate from 1.9 to 3.7 Volts.
- The design is powered from two primary cells(Nominal Voltage: 1.5 Volts each...total 3V)
I have added protection to resolve the concern that the batteries could come charged greater then 1.85 volts pushing me over the 3.7 operating limit.
The ultimate goal is to create a low power design. Typical consumption is less then 1 mA with burst at 150 mA(once a day)
Should I use a regulator for efficiency, safety, etc...?
I found the following question asked previously, but with no technical answer. Using a regulator or not?
The batteries combined range "should" be between 3.6V max and 2.4V (flat).
I have read in a few places that efficiency could be gained due to running at a lower voltage. For instance if I bucked the voltage to 2 V and assuming my typical current draw of 1mA 2mW vs 3mW powered directly from the battery. If the buck is 90% efficient then I'll be pulling 2.22mW which "seems" more efficient to me. Note: I am assuming we could get to 90% efficiency, but even 70% efficiency would be acceptable... I'm going off the cuff here... Am I missing something?