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TPS7A47: Does the Enable Pin on the TPS7A4701 have Schmitt Trigger functionality?

David Hildebrand
Expert 4860 points
Part Number: TPS7A47
Other Parts Discussed in Thread: TPS3701

I am posting this message on behalf of a customer.  They are using the TPS7A4701 and are curious if the enable pin for the part includes a Schmidt trigger circuit.  They are wondering if there could be potential issues with using a resistor divider for the enable pin with a slow moving input voltage.”

Thanks,

David Hildebrand

david.hildebrand@ti.com

  • 0
    TI__Guru 50190 points

    Hi David,

    Unfortunately no. The EN pin threshold is a standard logic level threshold that varies part to part. I checked the actual characterization data and the EN voltage ranges from a minimum of ~0.98V to a max of ~1.62V. If a divider is used, it should be set such that the voltage on this pin is >=2.0V to be enabled. If you need a precision turn on/off threshold, using a device like the TPS3701 to drive enable might get you the functionality you are looking for.

    What is the application where they would like to see this functionality?