Next bump I ran into.
I wanted to power the nRF9160 from one of the header pins, I don’t want to push 3V3 through the 3V3 pin since I am not sure the Feather M0 that I am using can handle the load of the nRF9160. What I wanted to do is tie the two “USB” pins together, and I noticed there is a diode that prevents powering FROM the USB pin, from the direction of the diode it only OUTPUTS the USB power from the nRF9160’s USB connector to the USB pin on the header.
Note, USB pin refers to JP2 pin 3, 5V0 tagged on the schematic.
What I resorted to is using a micro USB connector and plugging it in, this connector is connected to the “USB” pins on the Feather M0 to power the Feather nRF9150’s 3V3 regulator.
Not sure if it is a good idea to remove that diode, or maybe provide a couple pads on the bottom to solder bridge to bypass the diode if someone wants to backfeed power into the “USB” pin on the header to provide power to the Feather nRF9160’s 3V3 regulator.
Correct me if I am wrong here, but it appears the only way to power the Feather nRF9160’s 3V3 regulator is through the micro USB connector (or battery connector). I don’t dare feed 5V0 into that battery connector, I don’t think the charging IC will be happy with me.