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TPS5430: PCB design review

Part Number: TPS5430

Hi Team,

Our customer would like to request a PCB design review of two power supply board with TPS5430DDARG4. Please see attached schematic diagrams and PCB layouts. 

Thank you for your support!

Regards, 

Danilo

  • Hello Danilo,

    For 24V->5V schematic:

    For 24V->5V layout:

    I would recommend direct connections rather than thermal reliefs.

    The trace connecting the switch node to the PH pin is very skinny. I would recommend making this trace thicker. 

    The input capacitor should have thicker traces connecting it to the Vin pin and the GND pin.

    See the datasheet for an example layout.

    For 24V -> 12V schematic:

    What are the values of C148 and C149?

    For 24V -> 12V layout:

    Same comments as for the previous layout.

    Regards,

    Harrison Overturf