TPS62A01: Cff value different than 120pF

Hello Simon,

Thank you for reaching out,

The feedforward (Cff) will affect the step load performance. A higher Cff will result to lower overshoot/undershoot, but extended the recovery time. TI has only evaluated the Cff value from 0 to 120pF. If you would like to use the higher value for Cff, then you need to take care about the stability concerns. Please do stability analysis in case if you are using a higher Cff value.

You can perform the stability analysis by using Bode 100. Please find the attached document guiding to the bode plot measurements.

Stability related resources:

Simplifying Stability Checks (Rev. B) (ti.com)

Understanding and Simulation of Loop Stability Test for DC/DC Converters

Thank you & regards,

Moheddin.