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TPS7A85A: Pre bias Start UP

Part Number: TPS7A85A

Hi

My Customer has question.

Is TPS7A85A capable of Pre-Bias Start UP?

Regard

T Kishi

  • Hi T Kishi,

    TPS7A85A is able to startup when the output is pre-biased above or below ground (within the limits of abs max).

    If OUT is biased above ground, it is important to keep in mind that anytime Vout exceeds Vin, there is the potential for reverse current. As such, external measures should be taken to prevent reverse current if Vin does not exceed Vout.

    Furthermore, it is important to keep in mind that TPS7A85A has an active discharge circuit that will load the output so long as Vin or Vbias provides enough headroom for the discharge circuit to function.

    Very Respectfully,
    Ryan