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TPS62140: Feedback Circuitry

Roy Hsu
Genius 9390 points
Part Number: TPS62140

Hi there,

My customer needs to adjust the output voltage of TPS62140 on-the-fly so he adopts the circuitry as the circled area below.

I'm not quite sure if this is a common way of achieving that?

If yes, what's the purpose of the cap between the G and S terminal of the MOSFET?

Thank you!

Best regards,

Roy Hsu

  • 0
    TI__Guru**** 150820 points
    Hi Roy,

    This is a customer's custom implementation per their requirements. I will loop you in on the email discussion of this.

    I can only guess that the caps are there to slow down the transition between the output voltages.

    This device also has the DEF pin, which can achieve the +5% margining easier.