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TPS54329: The tps54329 has a return channel during power on

user4838693
Prodigy 190 points
Part Number: TPS54329

We use tps54329 to output 5V voltage, but when testing the power on waveform, we find that there is a return channel. Excuse me, how can we solve this problem?
The design drawing is as follows:

  • 0
    TI__Expert 7430 points

    Hi 

    Our US team will feedback to you after the holiday, please expect a delay.

    BR

    Ruby 

  • 0
    TI__Mastermind 21765 points

    Thanks for your question. The schematic looks fine to deliver 5V output. Looks like the output voltage dips are only observed during startup. Is it possible to confirm if there is anything else connected to the output of TPS54329 other than what is in the schematic? Are you using an electronic load and can try a resistive load instead? Finally, is it possible to also take SW node measurements with the same VOUT waveform to check on IC behavior.

    Thanks,
    Amod