Version 4
SHEET 1 1252 680
WIRE 432 -64 384 -64
WIRE 576 -64 512 -64
WIRE 704 -64 624 -64
WIRE 816 -64 768 -64
WIRE 896 -64 816 -64
WIRE 1008 -64 976 -64
WIRE 1040 -64 1008 -64
WIRE 1136 -64 1040 -64
WIRE 1040 -48 1040 -64
WIRE 1136 -48 1136 -64
WIRE 576 -32 576 -64
WIRE 624 -32 624 -64
WIRE 816 -16 816 -64
WIRE -80 0 -192 0
WIRE 16 0 -80 0
WIRE 48 0 16 0
WIRE 144 0 128 0
WIRE 176 0 144 0
WIRE 272 0 240 0
WIRE 304 0 272 0
WIRE 384 0 368 0
WIRE -192 16 -192 0
WIRE 16 48 16 0
WIRE 144 48 144 0
WIRE 272 48 272 0
WIRE 1040 48 1040 16
WIRE 1136 48 1136 32
WIRE 624 80 624 48
WIRE 816 80 816 48
WIRE -192 112 -192 96
WIRE 576 112 576 48
WIRE -80 128 -80 0
WIRE -48 128 -80 128
WIRE 336 128 320 128
WIRE -48 192 -64 192
WIRE 528 192 320 192
WIRE -48 256 -64 256
WIRE 576 256 576 208
WIRE 576 256 320 256
WIRE 576 272 576 256
WIRE 816 288 800 288
WIRE 896 288 880 288
WIRE 1008 288 1008 -64
WIRE 1008 288 976 288
WIRE -144 320 -160 320
WIRE -48 320 -64 320
WIRE 336 320 320 320
WIRE 432 320 416 320
WIRE 512 320 496 320
WIRE -48 384 -64 384
WIRE 368 384 320 384
WIRE 512 384 512 320
WIRE 512 384 368 384
WIRE 800 384 800 288
WIRE 800 384 512 384
WIRE 864 384 800 384
WIRE 1008 384 1008 288
WIRE 1008 384 944 384
WIRE 368 400 368 384
WIRE 64 480 64 448
WIRE 208 480 208 448
WIRE 368 496 368 480
FLAG 64 480 0
FLAG 208 480 0
FLAG 368 496 0
FLAG 576 352 0
FLAG 384 -64 0
FLAG 816 80 0
FLAG 624 80 0
FLAG 1040 48 0
FLAG -192 112 0
FLAG -64 384 0
FLAG -160 320 0
FLAG 1136 48 0
FLAG 336 128 0
FLAG 384 0 0
FLAG 1136 -64 OUT
SYMBOL PowerProducts\\LT1950 144 256 R0
SYMATTR InstName U1
SYMBOL res 352 384 R0
SYMATTR InstName R1
SYMATTR Value 4.99K
SYMBOL res 432 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 4.7K
SYMBOL cap 496 304 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value .01µ
SYMBOL nmos 528 112 R0
SYMATTR InstName Q1
SYMATTR Value IRF7413
SYMBOL res 560 256 R0
SYMATTR InstName R3
SYMATTR Value .015
SYMBOL ind2 560 -48 R0
WINDOW 0 0 36 Right 2
WINDOW 3 -2 73 Right 2
SYMATTR InstName L1
SYMATTR Value 100µ
SYMATTR Type ind
SYMATTR SpiceLine Rpar=10K
SYMBOL ind2 640 -48 M0
WINDOW 0 0 36 Right 2
WINDOW 3 -2 73 Right 2
SYMATTR InstName L2
SYMATTR Value 100µ
SYMATTR Type ind
SYMATTR SpiceLine Rpar=10K
SYMBOL voltage 528 -64 R90
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 32 56 VTop 2
WINDOW 39 32 56 VTop 2
SYMATTR InstName V1
SYMATTR Value 54
SYMBOL schottky 704 -48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value UPSC600
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 800 48 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value UPSC600
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind 880 -48 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L3
SYMATTR Value 47µ
SYMATTR SpiceLine Rpar=2K
SYMBOL cap 1024 -48 R0
SYMATTR InstName C2
SYMATTR Value 47µ
SYMATTR SpiceLine Rser=.2
SYMBOL res 960 368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL voltage -192 0 R0
SYMATTR InstName V2
SYMATTR Value 4
SYMBOL res -48 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 249K
SYMBOL ind 32 16 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L4
SYMATTR Value 4.7µ
SYMATTR SpiceLine Rpar=2K
SYMBOL schottky 176 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 304 16 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 4.7µ
SYMBOL cap 880 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 1000p
SYMBOL res 992 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL res 1120 -64 R0
SYMATTR InstName Rload
SYMATTR Value 20
TEXT 576 432 Left 2 !.tran 2m startup
TEXT 544 -88 Left 2 !K1 L1 L2 1