• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 34 subscribers
  • Views 206 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.

TUSB4020BI: Power-Off Timing

user6428397
Prodigy 70 points

Part Number: TUSB4020BI

Hi, 

We operate TUSB4020BI with an internal power supply instead of VBUS.
In what order should we turn off VDD33 and VDD when the power is off?  And should GRTSTz be set to Low level at that time?

Best Regards,

  • 0
    TI__Guru 64326 points

    Hi,

    A correct power-up sequence is more important than the power down sequence, no specific power down sequence is required. If you are using a passive reset then GRSTz will be low once VDD3 is removed. If you are using a active reset I recommend GRST be low just before power down.