Please take a look at this page of module's HRM:
https://www.digi.com/resources/documentation/digidocs/90001523/#reference/module/r_power_supply_architecture_cc6ul.htm
SW2: 3V3_EXT, free power line not used inside the module
Power domain Regulator type Output accuracy Maximum current Dropout voltage (MAX) Turn on time (MAX) Turn off time (MAX) Quiescent current in OFF mode (TYP)
SW2 DC/DC +/-6.0 % 1.25 A - 500 us -