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TPS63060: VOUT pin

Zeming Kong
Expert 3515 points
Part Number: TPS63060

Hi team,

My customer is evaluating TPS63060, and in their application, 6V will be input to VOUT pin somehow.

If VOUT output voltage is set as 5V lower than the input 6V, what will happen? Will it be shut down because feedback cannot work properly?

Best,

Zeming

  • 0
    TI__Genius 11215 points

    Hello Zeming,

     

    Thanks for your question. Could you please tell me what is the Vin to the TPS63060?

    If I understood correctly, the TPS63060 is regulating at 5V output voltage and there are additional 6V connected to its output, right? If yes, could you also tell me where are these 6V coming from? I'm looking forward to hearing from you soon.

     

    Kind regards,

    Elisabetta

  • 0 in reply to EM
    TI__Expert 3515 points

    Hi Elisabetta,

    Thanks for your reply.

    Yes, the customer wants to confirm what will happen if an additional 6V is connected to VOUT pin  when TPS63060 is outputting 5V.

    6V may be generated by another DC/DC converter or LDO.

    Input range: 4.5V~9V

    Best,

    Zeming

  • 0 in reply to Zeming Kong
    TI__Genius 11215 points

    Hello Zeming,

    Thanks for the clarification.

    To operate with the additional 6V connected to the output of the TPS63060, you first need to make sure that the power save mode is enabled (PS/SYNC pin). When the power save mode is enabled and the 6V are connected, the converter does not shut down, it waits for these 6V to be depleted. As soon as you disconnect the 6V, the converter starts regulating again at 5V. Please check as well that you stay below the absolute maximum ratings for the Vout pin.

     Let me know if I can help you furthermore,

     Elisabetta

  • 0 in reply to EM
    TI__Expert 3515 points

    Hi Elisabetta,

    Thanks for your explanation.

    Power Safe Mode is disabled. So I was wondering like below:

    -Since the IC is in forced PWM mode, current will be drawn from VOUT in an attempt to lower the voltage.

    -The VOUT FET is ON and current flows through into GND, which may damage the IC.

    Is my consideration correct? If so, how to protect the IC?

    Best,

    Zeming

  • 0 in reply to Zeming Kong
    TI__Genius 11215 points

    Hello Zeming,

    Thanks for your reply. Your considerations are correct. If you want to have the 6V connected to the Vout of the TPS63060, you have to enable the power save mode, there is no other option unfortunately. Furthermore, enabling power save mode is the only way to protect the IC.

    Kind regards,

    Elisabetta