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Original question:

TPS53659: How to setting and trigger VR_HOT# and PIN_ALT#?

TPS53659: Is SVID rising/falling timing adjustable?

Jan Bob
Intellectual 280 points
Part Number: TPS53659

Dear Experts,

Is SVID rising/falling timing adjustable?

Our "data" rising is about 608ps and Spec. is below 380ps.

We have tuned SVID pull-up resistor but it will also affect rising/falling timing at the same time, it seem not the best method.

  • 0
    TI__Genius 11095 points

    Hi Jan,

    SVID is an open drain interface, and the pull-down strength of the buffers in TPS53659 are fixed (not adjustable). The only "knob" available to tune would be the placement and strength of the pullup resistors. 

    You may want to check the bandwidth of your scope/probing also. Example, with 300ps is well outside the bandwidth of a 500MHz scope. 

    Are you actually seeing SVID communication failures?