Question nine
For a 12-V input, 1.0-V output, 4-MHz 25-A buck converter, the designer wants to get the best performance and minimum loss on the low side (Sync) FET. The controller has a minimum dead time of 25 ns. dI_L = 4 A. Calculate the Sync FET losses assuming a EPC2023. (Hint: From the EPC2023 data sheet, V_DS = 30 V, R_DS(on)max = 1.3 mΩ, I_D=25 A. Q_rr = 0.0 , V_SD (30A)= 2.2 V, Freq = 4MHz)

A. 0.58 W
B. 11.58 W
C. 3.6 W
D. 4.2 W
E. 13.2 W