Buck-boost converter, averaged circuit
* example of Section B.1.4

.lib switch.lib

Vg 1 0 15V
Xswitch 1 2 2 3 5 CCM2
+PARAMS: Ron=0.05 VD=0.8 RD=0
RL 2 4 0.1
L1 4 0 15uH ic=0
C1 3 0 50uF ic=0
R 3 0 20
Vc 5 0 0.8
.tran 10u 1.2m 0m 10u uic

.probe
.end