nRF9160 Feather Operating Voltage

tguyen

Hello,

I want to power my Feather through the VBUS pin using 3.3V from my existing host board, but I wasn’t sure if this was OK because of the Feather’s internal regulator.

What is the required operating voltage range for the Feather’s VBUS pin?

Thanks!

jaredwolff

The TPS62840 is capable of 100% duty-cycle. So I would think it would be fine as long as your host board can handle the higher current transients the modem produces while transmitting/receiving. (I’ve seen up to 750mA spikes). You’d have to do some validation with your design to make sure it performs. Especially at the edge cases if you’re deploying the device outdoors.