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TPS7A02: Overdriving output voltage

Rami Abdelmotalib
Prodigy 30 points
Part Number: TPS7A02

For my application, I will be using either the 2.2V or 2.3V TPS7A02 (still undecided). I would like to connect 3V to Vin and temporarily short it to Vout (shorting Vin and Vout), to have a non-regulated 3V power to my circuit. I am going to need to do this only once (for a period of a few days) and afterwards, the LDO will resume its normal, intended operation.

Are there any permanent / temporary drawbacks to overdriving the output voltage?

Will the LDO try to actively regulate its output? Will that affect its current consumption at all?

  • 0
    TI__Mastermind 38115 points

    Hi Rami,

    I don't think shorting VIN to VOUT will cause any problems since the abs max spec is not violated for VOUT with VIN = 3V and EN abs max will be fine as well. If the part is enabled during this short condition then I think the quiescent current draw will increase because the internal error amp will drive the gate of the pass FET to its lower rail (i.e. GND). Of course a way around that is to disable the part during this condition if you have the resources.

    Regards,

    Nick