SEPIC frequency response
* example of Section B.2.1

** setup **
.param RL=40
.op 
.step lin param RL 40 50 10
.probe

*.OPTIONS ABSTOL=10p
*.OPTIONS CHGTOL=0.1pC
*.OPTIONS GMIN=1u
*.OPTIONS ITL4=20
*.OPTIONS RELTOL=0.01
*.OPTIONS VNTOL=10uV

* converter netlist
Vg 1 0 dc 120V
L1 1 2x 500uH
Rl1 2x 2 0.1
C1 2 3 47uF
L2 3x 3 100uH
Rl2 0 3x 0.02
C2 4 0 200uF
Rload 4 0 {RL}

* duty cycle input
vc 5 0 dc 0.4 ac 1

* subcircuit
Xswitch  2 0 4 3 5 CCM-DCM1 
+PARAMS: L=83.33uH fs=100K

.lib switch.lib

* analysis setup:
.ac DEC 201 5 50KHz

.end