* Buck Converter — CCM
V1 in 0 DC 5
S1 in sw g1 0 SW1
V1g g1 0 PULSE(0 5 0 1n 1n 90n 500n)
D1 sw in DM1
D2 0 sw DM2
R1 sw 0 100meg
R2 sw n1 10m
L1 n1 n2 10u
R3 n2 out 1m
C1 out 0 22u
R4 out 0 1
.model SW1 SW(Ron=10m Roff=100meg Vt=0.5)
.model DM1 D(Vfwd=1n Ron=10m Roff=1gig)
.model DM2 D(Vfwd=1n Ron=10m Roff=1gig)
.tran 600u
.end