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TPS7A10: Output Capacitor ESR

Michael Ferrara
Prodigy 30 points
Part Number: TPS7A10

In the datasheet for this part is states that the MAX ESR should be less than 250mohms. However, for caps the ESR varies vs frequency. At what point is this MAX ESR value supposed to be compared for output capacitor determination?

  • 0
    TI__Mastermind 38575 points

    Hi Michael,

    The overall impedance of the cap changes, but the ESR does not. See the below graphic from Digikey's forums. 

    The ESR is derived from the lowest point in the impedance plot, and the frequency at this point is the resonant frequency.

    Regards,
    Nick