2
votes
3answers
621 views

Most efficient way to achieve 3.6V or less from NiMH or Li-Ion batteries (when fully charged)

I have a micro and RF module both which I'd like to power from either 3 AA NiMH cells or a single 18650 Li-ion cell. Haven't decided which I'll use yet. My current requirements aren't that much (~2mA ...
2
votes
2answers
178 views

Accepting a Range of Input Voltage that Straddles Operating Voltage

I want to design a system that runs at 5V and about 350mA. I want that system to accept an input voltage between 1.8V and 15V. How can I achieve that goal with a minimum component cost in my input ...