SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Normally, the VDDS supply pins of the CC13x2x7 and CC26x2x7 device platform are powered from a 1.8 V to 3.8 V supply (for example, batteries), and the VDDR supply pins are powered from the internal DC/DC regulator.
Alternatively, the internal global LDO can be used instead of the DC/DC regulator, but this increases the current consumption of the device. In this mode, disconnect DCDC_SW and connect VDDS_DCDC to the VDDS supply. The Global LDO is connected internally to the VDDR pin, which must be connected externally to the VDDR_RF pin. The Global LDO must be decoupled by a µF-sized capacitor on the VDDR net.