Version 4
SHEET 1 920 680
WIRE -48 0 -208 0
WIRE 128 0 32 0
WIRE 160 0 128 0
WIRE 288 0 160 0
WIRE 464 0 368 0
WIRE 592 0 464 0
WIRE 608 0 592 0
WIRE -208 48 -208 0
WIRE -32 64 -32 48
WIRE 160 64 160 0
WIRE 304 64 304 48
WIRE 16 80 16 48
WIRE 352 80 352 48
WIRE 464 80 464 0
WIRE 592 80 592 0
WIRE -208 192 -208 128
WIRE 16 192 16 160
WIRE 160 192 160 128
WIRE 352 192 352 160
WIRE 464 192 464 144
WIRE 592 192 592 160
FLAG -208 192 0
FLAG 592 192 0
FLAG 160 192 0
FLAG 464 192 0
FLAG 16 192 0
FLAG 352 192 0
FLAG -32 64 0
FLAG 304 64 0
FLAG -208 0 +V
FLAG 608 0 c2
IOPIN 608 0 Out
FLAG 128 0 c1
SYMBOL voltage -208 32 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL sw -64 0 R270
SYMATTR InstName S1
SYMBOL sw 272 0 R270
SYMATTR InstName S2
SYMBOL res 576 64 R0
SYMATTR InstName RL
SYMATTR Value {RL}
SYMBOL cap 448 80 R0
SYMATTR InstName C2
SYMATTR Value 22µ
SYMBOL cap 144 64 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL voltage 16 64 R0
WINDOW 3 -218 177 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 1 0 10n 10n {T1} {TP})
SYMATTR InstName V2
SYMBOL voltage 352 64 R0
WINDOW 3 -212 174 Left 2
SYMATTR Value PULSE(0 1 {TD} 10n 10n {T1} {TP})
SYMATTR InstName V3
TEXT -200 320 Left 2 !.tran 0 5m 0 0.05u
TEXT 144 312 Left 2 !.model sw sw(Ron=100m Roff=1G Vt=0.5)
TEXT -200 384 Left 2 !.param TP=20u \n.param T1=TP/2-0.5u\n.param TD=TP/2
TEXT 144 352 Left 2 !.meas PV1 AVG -I(V1)*V(+V) FROM 3m to 5m\n.meas PRL AVG I(RL)*V(c2) FROM 3m to 5m\n.meas eff param PRL/PV1\n.meas avg AVG V(c2) FROM 3m to 5m
TEXT -200 344 Left 2 !.options plotwinsize=0
TEXT -200 488 Left 2 !.step param RL list 10 20 30 50 70 80 100 140 200 300 500
TEXT -200 528 Left 2 ;.step param RL 50 100 10