Question four

Same buck converter. V_IN =12 V, V_OUT =1.2 V, I_OUT =20 A, f_sw =200 kHz 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. 5 μH and 2 μF

B. 10.8 μH and 62.5 μF

C. 1.08 μH and 62.5 μF

D. 5.08 μH and 0.5 μF

E. 0.108 μH and 6.25 μF