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TPS745-Q1: TPS74512PQWDRVRQ1 En Pin

Harish S1
Prodigy 70 points
Part Number: TPS745-Q1

Tool/software:

Hi,

For TPS74512PQWDRVRQ1 1.2V fixed o/p LDO , can we have the Enable voltage greater than the VIN supply i/p Voltage ,in my case Vin is 1.8V ,  Enable to the LDO is connected to a GPIO with 3.3V logic.

I am afraid of any clamp diode inside LDO's  EN pin  that would clamp because of higher En voltage than the Vin.

Regards,

Harish.S

  • 0
    TI__Genius 12145 points

    Hello Harish,

    Thank you for your question.

    Yes, it is okay to have the EN voltage be larger than the input voltage.

    Please make sure that there is enough of a differential between Vin and Vout for the LDO to regulate properly.

    Best,

    Hannah