SPRUIN7C March 2020 – March 2024 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1
The TMS320F28002x MCU 1.2V core is powered up internally with the LDO (VREG). VREG power is derived from the 3.3V rail so this device can support a single 3.3V rail operation.