Boost 3.3v to 5v to power external hardware

Hello NCD community!

I want to power the 2-channel 4-20mA current loop I2C board with my Particle electron.
The Electron uses 3.3V but I need 5V to power the board (and maybe other boards in the future) through the electron.
I figured a power booster can be used together with a load switch to make this work.

If I use a load switch to enable/disable 3v3 pin connected to a boost converter (3.3V to 5V), i can cut the power when I don’t use the 4-20mA sensor board.

The boost converter then converts the 3v3 to 5v and the 4-20mA sensor board is powered. This should be possible, right?

I found these boost converters:
https://dk.rs-online.com/web/p/ladepumper/4457220/
https://dk.rs-online.com/web/p/boost-convertere/8123619/
http://uk.farnell.com/texas-instruments/reg710na-5-250g4/dc-dc-converter-50ma-5-0v-sot-23/dp/1207265

and these load switches:
https://www.diodes.com/assets/Datasheets/AP2280.pdf (P-channel)
https://www.diodes.com/assets/Datasheets/AP2281.pdf (P-channel)
https://www.diodes.com/assets/Datasheets/AP22800.pdf (N-channel)

Are these usable for this situation?

Thanks in advance,

Nme


You can add this part in between I2C shield and the 4-20mA board.
This will cut off the ground line.

https://www.digikey.com/product-detail/en/alpha-omega-semiconductor-inc/AO4842/785-1064-1-ND/1856006

The boost converter doesn’t consume any significant power when its in idle mode.

Thanks