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TPS51200: VO and REFOUT

na na78
Guru 16770 points
Part Number: TPS51200

Hi

What is the reason to have different output port for REFOUT(VTTREF) and VO(VTT) in spite of same voltage?

BestRegards

  • 0
    TI__Mastermind 24075 points
    Hello,

    Usually TPS51200 is used to provide VTT power for DDR.
    At no load condition, VTT and VTTREF are very close.
    While at load condition, VTT voltage has larger variaton than VTTREF.

    A seperate VTTREF signal with tighter regualtion is required by DDR.

    Thanks
    Qian