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TPS54620: Schematic review

Yangbo
Intellectual 1690 points
Part Number: TPS54620

Hi expert, 

Please help to review the schematic below:

Noted that there is a 100uf capacitor at the input of FPGA. And all capacitors are ceramic. Thanks a lot!

Regards,

Yangbo

  • 0
    TI__Mastermind 35165 points

    Hi Yangbo,

    I've taken a look at it and have 3 comments below. Do you have any details on how the component values were selected?

    1. Is R94 2.7 kΩ or 27 kΩ? With 12V in to 1 V out, the max fsw I recommend for this is 600 kHz. The RT/CLK resistance should be >~80 kΩ for this.
    2. The TPS54620 requires ceramic bypass capacitors placed as close as possible to the VIN and PVIN pin.
    3. What is the value of the inductance L8?

    Best Regards,
    Anthony