Hi Team,
According to user’s guides of EVM, the maximum value of feedforward capacitor(Cff) is 10pF.
However, we use the large feed forward capacitor at the following conditions to improve phase margin.
If we use Cff more than 10uF, are there any some problem there?
We would like to set the phase margin to 40deg.
[Conditions]
-Vin=12V
-Vout=5V (Feedback resistor is 51ohm(injection resistor)+54.9kohm and 10kohm)
-Iout=1A
-L=4.7uH
-Cout=116uF (47uF + 47uF + 22uF)
-C9(Feed forward cap)= more than 10pF
Regards,
Kanemaru
