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TPS62740: Resistor between EN and VIN

Antony Lin
Genius 13480 points
Part Number: TPS62740

Hi,

The customer design now connect EN pin to VIN through a 10kohm resistor so that the device is enabled whenever there's a valid VIN,  Is it better or worse to implement a 10kohm here?  How to judge what is a better value here?

Thanks!

Antony

  • 0
    TI__Genius 14876 points

    Hello Antony,

    10kohm is a good value to connect EN to VIN. 

    To enable the TPS62740 when VIN is valid, you can also use a resistor bridge which will provide a lower voltage at EN than VIN. You just need to make sure when you think VIN (5.5V>VIN>2.2V) is acceptable for the device to turn on then voltage at EN is at least 1.1V.

    If you have any other questions, please ask!

    Best Regards,

    Dorian