Question five

Same buck converter. V_IN =12 V, V_OUT =1.2 V, I_OUT =20 A, f_sw = 1 MHz calculate the inductor and capacitor values needed to achieve a ripple current (dI_L) of 5 A and an output ripple voltage (dV_pp) of 50 mV. (Hint: Remember from the inductor law, V_L = L di/dt. The duty cycle of the buck converter is given as D = V_OUT/V_IN.)

A. 2.2 μH and 125 μF

B. 0.54 μH and 0.4 μF

C. 7 μH and 50 μF

D. 2.58 μH and 86 μF

E. 0.22 μH and 12.5 μF