SWRA640G December 2018 – September 2022 CC1310 , CC1312R , CC1314R10 , CC1350 , CC1352P , CC1352R , CC1354P10 , CC1354R10 , CC2620 , CC2630 , CC2640 , CC2640R2F , CC2640R2F-Q1 , CC2642R , CC2642R-Q1 , CC2650 , CC2652P , CC2652R , CC2652R7 , CC2652RB , CC2652RSIP , CC2662R-Q1 , CC2674P10 , CC2674R10
The CC13xx/CC26xx devices have three power rails that are exposed on external pins: VDDS, VDDR and DCOUPL. VDDS is the main power source for the wireless microcontroller and must be supplied externally with 1.8 V to 3.8 V. VDDR is an internal power rail that is supplied from the internal DC/DC converter, or the internal Global LDO, but can be powered from an external supply. VDDR is regulated to approximately 1.68 V, or 1.95 V when running in boost mode for maximum output power in sub-1 GHz bands. In boost mode, a minimum VDDS voltage of 2.1 V is required. DCOUPL is supplied internally by either Digital LDO or Micro LDO depending on the power state. This power rail is trimmed to approximately 1.28 V and requires an external decoupling capacitor of 1 µF.