TMS320F28379D: Issue with 3.3V Power Output When Using External 5V on LAUNCHXL-F28379D

Part Number: TMS320F28379D

Dear TI Support,

Hello, I am currently using the LAUNCHXL-F28379D and would like to power the control board using an external 5V source. Following the instructions in the user manual, I have removed JP2, JP3, and JP6, and supplied 5V through the J16 header.

However, during testing, I measured only 2.7V on the 3.3V power rail of the board. Is this behavior expected?
Should the 5V input be automatically converted to a stable 3.3V by the onboard regulator?

Thank you for your assistance.

Best regards,

Andy Chen