• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 3160 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

DDR3 VTT termination

Stephen Kim
Prodigy 620 points
Other Parts Discussed in Thread: TPS40056

A customer is looking for a DDR3 VTT termination.

Vin = 12V

Iout = 8A

Do we have an integrated device that can do thie?

 

  • 0
    TI__Guru 51745 points

    Nothing integrated, but a TPS40056 controller with external MOSFETs and an external divider will be able to support this application.

     

    Be careful when testing the sinking function of a DDR VTT rail application.  Most lab supplies do not have the ability to sink current at their outputs, and a synchronous BUCK regulator in SINK mode will boost energy from its output back to the input with fairly high efficiency.  It may be nessecary to place a small dummy load on the input to sink boosted output current when testing the sink function.  Failure to do this can result in over-voltage on the input and damage MOSFETs or controller.