Yes, i know that, but, for example, If we calculate the compensation circuit for second channel: if using type II, then R255 = (2pi * Fc * Vout * C177)/(Gm * Gmps * VREF), We know, that Fsw about 1MHz, because R257 = 150K, then Fc = 10^5. I know, that VREF = 0.8 V (I read the data from the TPS65400 using I2C). Ok, then R255 must be about 48K (for type III - about 12K). I understand that the value of the R257 = 100K is taken with a margin. And i understand that the values of C173 and C176 most likely was defined from bench test. But i don`t understand reasons for using value of C172 such 150pF. The value of this capacitor usually also taken with a margin (as in the compensation circuit for first channel, where the calculated value for C167 about 250pF), but for this capacitor C172 = Rload * C177 / R257, Rload = 3.3V / 1.6A, that about 2Ohms, then C172 = 450pF. I understand that only the designer of this scheme will be able to answer this question. Anyway, thanks for your reply!