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WEBENCH® Tools: TPS54526PWP: Feedback resistor selection

Nanjunda M
Expert 2485 points

Tool/software: WEBENCH® Design Tools

Hi,

I'm using TPS54526PWP in my design for 1.35V generation from 5V input.

The schematics is attached below.

The Webench schematics is as below.

The confusion  I have is, whether to use the feedback resistor I have in my schematics are ok or do i need to go with values suggested as in Webench schematics.

Please let me know ASAP.

Thanks & Regards,

Nanjunda M

  • 0
    TI__Genius 14455 points
    Hi Nanjunda,
    The feedback resistor from either of the design should be ok to give you 1.35V Vout. The difference is only 1mV between the two. The WEBENCH resistor has a slightly higher resistance of 46.1K compared to 39K which can give you slightly lower leakage. But the Vout is 1.3512 V from an accuracy perspective. You can pick whichever you are comfortable with.

    Regards,
    Gerold