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TPS63710: Schematic review request

Kevin Lai
Intellectual 2916 points
Part Number: TPS63710


Hi team,

can you please help to -

1. Review the schematic 

2. Confirm whether the inductor selected is fine.

3. let me know if the inductor is overkill.

VIN = 12V

VOUT = -5.5V (Negative)

IOUT = 0.061mA

INDUCTOR = VLS6045EX-4R7M

Thanks,

Kevin 

  • 0
    TI__Genius 14455 points

    Hi Kevin

        Matt is looking into this and will get back to you by Monday Nov 2nd.

    Regards,

    Gerold

  • 0
    TI__Intellectual 1610 points

    Kevin,

    There would not be any performance impact to using the VLS6045EX-4R7M inductor, but the 4+A rating is more than you need for this application given the <100mA load current.  You do want to use a 4.7uH inductance with your +12V input voltage, but you may be able to find a smaller or cheaper inductor with lower current rating if the solution size or cost is a concern.

    Similarly, given the limited load current, you could consider reducing the values of the CP and Cin capacitors as described in the Application and Implementation section of the datasheet..  The 3x 10uF for CP is what is recommended for 1A of dc output current, and depending on the dc bias effect of the capacitors you're using, I would exepct that you would be able to reduce these values significantly.

    Sincerely,

    -Matt