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TPS2121: Correct configuration

d_zero
Genius 4795 points
Part Number: TPS2121

Dear *

we want to use TPS2121 in our design.

We have two inputs VBUS and AUX DC 5V

Because the VBUS is 5V and AUX DC is 5V , what is the proper connection that when ever AUX DC 5V is present it is used over VBUS 5V?

Best Regards,
David.

  • 0
    TI__Genius 10855 points

    Hi David, 

    Thanks for reaching out on E2E!

    To clarify the configuration, both inputs are 5V and AUX DC needs to take priority. Therefore, I recommend looking at the datasheet for the XCOMP configuration, page 24, with AUX DC on IN1 and VBUS on IN2. 

    Thanks,

    Arthur Huang