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TPS65131: Schematic check for only negative output application

Robin Yu
Intellectual 2190 points
Part Number: TPS65131

Hi team,

If only negative power rail is used, could the components in the red rectangle be removed? I think it should be OK, how to connect the related pins? Connect them to GND or just put them floating? Thanks.

And customer want to double confirm if the feedback resistor for Vneg is OK. I think it is fine. 

Please help double confirm, thanks.

  • 0
    TI__Guru 61075 points
    Hello Robin,

    If the customer sets ENP to GND, removing all components for the boost converter is ok. Please leave all these pins floating. The CP cap is as well not necessary if ENP is fixed to GND.

    The negative resistor divider looks good to me.

    Best regards,
    Brigitte