### MCP1640 - Battery Boost Board
Here's another generic battery boost board using the MCP1640:
- https://www.digikey.com/en/products/detail/mikroelektronika/MIKROE-712/4495636
- https://download.mikroe.com/documents/add-on-boards/mikromedia-shields/3/battery-boost/mikromedia-battery-boost-shield-manual-v100.pdf
![[Pasted image 20250119231448.png]]
https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP1640-Family-Data-Sheet-DS20002234E.pdf
Microchip MCP1640/B/C/D looks promising
Vin = 0.35V, 0.65V Startup - Could always just use a volt pulse on startup to get it going. not a problem.
Vout = 3.3V @ 1mA
$0.81
Probably cheaper than the toroids lol
https://www.digikey.com/en/products/detail/microchip-technology/MCP1640B-I-MC/2258562
https://www.digikey.com/en/products/detail/microchip-technology/MCP1640C-I-MC/2258564