• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 862 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.

TPS51206: why need VTTref and VTT?

user021864
Intellectual 2145 points
Part Number: TPS51206


Hi, 

I wanna know why do we have VTTref and VTT at the same time? 

what does VTTref for? 

is there any specific limit for the application to connect the VTTref and VTT?

The other question is what is the advantage using this part rather than normal DC-DC converter? 

Thanks for your help.

  • 0
    TI__Mastermind 24075 points

    Hello,

    TPS51206 was designed for DDR application.

    A separate VTTREF signal is required from DDR side. DDR compares input signal to VTTREF to know if the signal is logic high or low.

    During operation, VTTREF voltage variation is small because VTTREF current is very small. While VTT voltage has larger variation due to large VTT current.

    Thansk

    Qian