Version 4
SHEET 1 1580 680
WIRE 112 32 64 32
WIRE 240 32 112 32
WIRE 512 32 320 32
WIRE 544 32 512 32
WIRE 752 32 624 32
WIRE 864 32 752 32
WIRE 912 32 864 32
WIRE 1056 32 912 32
WIRE 512 80 512 32
WIRE 752 80 752 32
WIRE 912 80 912 32
WIRE 304 96 304 80
WIRE 1056 96 1056 32
WIRE 256 112 256 80
WIRE 64 128 64 32
WIRE 256 224 256 192
WIRE 512 224 512 144
WIRE 752 224 752 144
WIRE 912 224 912 160
WIRE 1056 224 1056 160
WIRE 64 240 64 208
FLAG 64 240 0
FLAG 512 224 0
FLAG 752 224 0
FLAG 912 224 0
FLAG 864 32 OUT
FLAG 112 32 IN
FLAG 1056 224 0
FLAG 256 224 0
FLAG 304 96 0
SYMBOL voltage 64 112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value {Vin}
SYMBOL ind 528 48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 20µ
SYMBOL cap 736 80 R0
SYMATTR InstName C1
SYMATTR Value 47µ
SYMATTR SpiceLine Rser=0.1
SYMBOL res 896 64 R0
SYMATTR InstName R1
SYMATTR Value 5
SYMBOL voltage 256 96 R0
WINDOW 0 -61 16 Left 2
WINDOW 3 -154 160 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 0 1n 1n {D} {1/F})
SYMBOL schottky 528 144 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value B530C
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL load 1040 96 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value PULSE(0 2 1.2m 100n 100n 600u 3m)
SYMBOL sw 336 32 M270
SYMATTR InstName S1
TEXT 376 312 Left 2 !.tran 0 3m 0 10n
TEXT 504 -120 Left 2 !.PARAM F = 300k
TEXT 504 -88 Left 2 !.PARAM D = (Vout) / (Vin - Vdiode) * (1/F)
TEXT 504 -200 Left 2 !.PARAM Vin = 12V
TEXT 504 -176 Left 2 !.PARAM Vout = 5V
TEXT 504 -152 Left 2 !.PARAM Vdiode = 0.38V
TEXT 40 -192 Left 2 !.model SW SW (Ron = 1m Vt = .5)