SNVSBJ0A December 2019 – June 2020 LM5170
TI recommends making the following selections:
Then the monitors' delay is determined by the following time constant:
At full load, the DC component of the monitor voltage is determined by:
Because the inductor ripple current is 23.8 A, according to Equation 11, the IOUT peak to peak ripple current is:
The RC filter corner frequency is thus given by:
The resulting peak-to-peak monitor ripple voltage is approximately determined by:
Which is approximately 1.1% peak-to-peak ripple on top of the full load DC monitor voltage. Increasing CIOUT value will further attenuate the ripple voltage, but also cause longer monitor delays.