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TPS3613-01: unused pin configuration(SENSE, MR and RESET)

Shinichi Inoue
Guru 21686 points
Part Number: TPS3613-01

Dear Specialists,

My customer is considering TPS3613-01 and has a question.

I would be grateful if you could advise.

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Could you please recommend how we should terminate the unused pins(SENSE, MR and RESET) for unused?

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I appreciate your great help in advance.

Best regards,

Shinichi

  • 0
    TI__Genius 9375 points

    Hi Shinichi-san,

    Please see the function table and choose the conditions of Vout, /RESET, RESET, and /CEOUT they desire. This will help you decide whether to ground or connect the pins to Vdd.

    Thanks,
    Abhinav.

  • 0 in reply to Abhinav.Sharma
    Guru 21686 points

    Hi Abhinav,

    Thank you for your reply.

    I confirmed your advise and consider.

    I have three question, could you please advise.

    -----

    (1)The RESET pin is an output, the logic of H / L depends on VIT, VDD and BAT.
    What should the output be in this case?

    (2)Since MR pin is an input pin, should it be inactive H when not used?

    (3)The SENSE pin must be connected because it is necessary to determine whether VDD is higher or lower than VIT.

    Is it correct?

    -----

    I appreciate your great help.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Genius 9375 points

    Shinichi-san,

    1) I don't quite understand this question. If this pin is unused, you can leave it floating since it is an output.

    2) Since /MR is an input, you are correct. You should be terminating this with a high signal.

    3) You're correct, you should be connecting SENSE to the rail you are monitoring to ensure it stays above the threshold.

    Thanks,
    Abhinav.

  • 0 in reply to Abhinav.Sharma
    Guru 21686 points

    Hi Avhinav,

    Thank you for your reply.

    I listed my understanding below.

    Could you please advise about these understanding?

    ---

    (1) RESET : Floating

    (2)MR : Floating  Because this pin is connected to VDD in the device, I think it doesn't need to connect device outside, is it correct? 

    (3) SENSE : It should be connected to the rail with resistor.

    ---

    I appreciate your great help.

    Best regards,

    Shinichi

  • 0 in reply to Shinichi Inoue
    TI__Genius 9375 points

    Shinichi-san,

    Your understanding is correct.

    Thanks,
    Abhinav.

  • 0 in reply to Abhinav.Sharma
    Guru 21686 points

    Hi Abhinav,

    Thank you for your reply.

    I'll share your suggestion with the customer.

    I appreciate your great help.

    Best regards,

    Shinichi