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How to calculate R1, C4 Value in TPS63020 for improved load transient performance.

Nilav Choksi66
Intellectual 500 points
Other Parts Discussed in Thread: TPS63020

Hello,

How to calculate R1 and  C4 Value which is given in Application circuit of datasheet for TPS63020 for improvement of load transient performance.

Thanks.

  • 0
    TI__Intellectual 1110 points

    The value of R1 and C4 depends on several parameters, like the feedback resistor network, transfer function of the control loop and more. I would suggest to start with the given values in the datasheet (R1=68kR, C4=4.7pF) and go into an optimization process until the transient response fulfils your requirements. Please note, that a too big capacitor can cause unstable behavior.
    Best regards, Felix