• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 82 subscribers
  • Views 182 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

TMS320F28377D: Why TI do not remove the pin of VREGENZ if it is not supported?

TMS320F28377S: VREGENZ pin connected to VSS that isn't supported

Eric Chen
Intellectual 1930 points
Part Number: TMS320F28377S


Tool/software:

Dear expert, 

In our old DS, we didn't mention that the VREGENZ isn't supported. 

SPRS881C:

SPRS881D:

SPRS881I:

If the user has already connected the pin to VSS, will there be any issue coming? 

Best Regards,

Eric Chen

  • 0
    TI__Mastermind 36526 points

    Hi Eric,

    Does the customer also have an external voltage regulator, or are they solely relying on the internal voltage regulator?

    Thanks,

    Ben Collier

  • 0 in reply to Benjamin Collier
    TI__Intellectual 1930 points

    Dear Ben, 

    They rely on the internal one, but actually didn't encounter any issue yet. 

    But is there any potential risk that user should take care of? 

    Or can we have more details about how the internal voltage regulator will work when the VREGENZ pull to VSS? 

    I think the VREGENZ shouldn't have any function because the feature isn't supported on F28377.

    Best Regards,

    Eric Chen

  • +1 in reply to Eric Chen
    TI__Mastermind 36526 points

    Hi Eric,

    The problem is that the internal regulator cannot supply this maximum of 400 mA 

    It is possible that the customer's application never puts a load on the CPUs that require this much current consumption, but our recommendation has to be that the customer uses an external voltage regulator for Vdd. We cannot guarantee reliable operation with internal voltage regulator.

    Best Regards,

    Ben Collier