Re: [EE]:: 1 / 2 / 3 cell input boost converters with 1.8 - 5.5 Vout in the sub milliamp to 100 mA+ range. Vinmin 0.5 / 0.7 / .

I had fun designing something similar but different. See attached.

Requirement was for either 2 or 4 x AAA cells. The uC runs on unregulated supply 
when idling (MCP16262 bypasses input to output when disabled and consumes only 
1uA, reverse polarity circuitry a couple more uA's). Boosts to 3.6V on uC request 
(reg then takes 4uA? or more while running). Load was some 10's or low 100's of 
mA for 20s or so to drive some LEDs before disabling reg and switching back to 
idle. Ok down to I think 0.8V per cell.

On 25 Feb 2026 at 13:40, RussellMc wrote:

> Someone on SEEE asked a question about a 2 AA cell to 3V3 boost converter.
> I answered based on my current experience with TLV61220.
> (I'm operating at around 200 uA load, so my preferred 61220 IC may not suit
> others. 61225 may be better.
> (Lower Voperate, wider Vin range, 100 mA ish max load, ...)
> 
>         https://electronics.stackexchange.com/q/766149/3288