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TPS7A66-Q1: Bode Plot Measurement

Josef Warta
Expert 4300 points
Part Number: TPS7A66-Q1

Hello Team,

is it possible to do a Bode Plot measurement on a TPS7A66-Q1?

Because there is no feedback pin to inject the signals.

Many Thanks

Josef

  • 0
    TI__Genius 12960 points

    Hello Josef,

                       At this point we do not have a method to make Bode plot measurements for phase margin information with the device on a board/ EVM. Even if the FB was available to break the outer loop, the LDO design consists of other multiple internal loops which cannot be accessed or broken. 

                       The response of the LDO to a quick load transient is an indirect but an effective method to asses phase margin and stability. Here is a link to an app note that further describes this: https://www.ti.com/lit/an/slva381b/slva381b.pdf. Thanks!

    Regards,

    Srikanth