Version 4
SHEET 1 1264 680
WIRE -16 -144 -144 -144
WIRE 176 -144 -16 -144
WIRE -144 -112 -144 -144
WIRE 176 -96 176 -144
WIRE -144 0 -144 -32
WIRE 176 0 176 -32
WIRE 176 0 -144 0
WIRE 320 0 176 0
WIRE 816 0 320 0
WIRE 912 0 816 0
WIRE 992 0 912 0
WIRE 1104 0 992 0
WIRE -144 32 -144 0
WIRE 608 32 544 32
WIRE 1104 32 1104 0
WIRE 320 48 320 0
WIRE 912 48 912 0
WIRE 608 64 608 32
WIRE 816 112 816 0
WIRE -16 144 -16 -144
WIRE 608 160 608 144
WIRE 688 160 608 160
WIRE 912 160 912 112
WIRE 608 176 608 160
WIRE 320 224 320 128
WIRE 320 224 112 224
WIRE 544 224 544 32
WIRE 544 224 320 224
WIRE 992 240 992 0
WIRE 1200 240 1200 208
WIRE 608 288 608 256
WIRE 608 288 112 288
WIRE 816 288 816 192
WIRE 816 288 608 288
WIRE 912 288 912 240
WIRE 912 288 816 288
WIRE 688 320 688 160
WIRE 816 336 816 288
WIRE -144 352 -240 352
WIRE 224 352 112 352
WIRE 320 352 320 224
WIRE 1200 352 1200 320
WIRE -240 368 -240 352
WIRE -240 480 -240 448
WIRE -16 480 -16 432
WIRE -16 480 -240 480
WIRE 224 480 224 416
WIRE 224 480 -16 480
WIRE 320 480 320 416
WIRE 320 480 224 480
WIRE 688 480 688 384
WIRE 688 480 320 480
WIRE 816 480 816 416
WIRE 816 480 688 480
WIRE 992 480 992 304
WIRE 992 480 816 480
WIRE 1088 480 992 480
FLAG 1104 32 0
FLAG -144 32 0
FLAG 1088 480 -5V
FLAG 1200 352 0
FLAG 1200 208 -5V
SYMBOL RES 800 320 R0
SYMATTR InstName R1
SYMATTR Value 1.82k
SYMBOL RES 800 96 R0
SYMATTR InstName R2
SYMATTR Value 2.7k
SYMBOL ind 304 32 R0
WINDOW 0 45 50 Left 2
WINDOW 39 36 108 Left 2
SYMATTR InstName L1
SYMATTR SpiceLine Rser=0.05
SYMATTR Value 25u
SYMBOL schottky 304 416 M180
WINDOW 0 31 63 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value MBR745
SYMBOL POLCAP 976 240 R0
WINDOW 39 24 85 Left 2
SYMATTR SpiceLine Rser=0.07
SYMATTR InstName C1
SYMATTR Value 1000u
SYMBOL cap 208 352 R0
SYMATTR InstName C2
SYMATTR Value 0.1u
SYMBOL PowerProducts\\LT1074 -16 288 R0
SYMATTR InstName U1
SYMBOL polcap 160 -96 R0
SYMATTR InstName C3
SYMATTR Value 220u
SYMBOL res 592 48 R0
SYMATTR InstName R3
SYMATTR Value 5.1k
SYMBOL res 592 160 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL cap 672 320 R0
SYMATTR InstName C4
SYMATTR Value 10n
SYMBOL voltage -144 -128 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL Misc\\EuropeanResistor 1184 224 R0
SYMATTR InstName RL
SYMATTR Value 500
SYMBOL res -256 352 R0
SYMATTR InstName R6
SYMATTR Value 2.2k
SYMBOL res 896 144 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL cap 896 48 R0
SYMATTR InstName C5
SYMATTR Value 1u
TEXT -152 -232 Left 2 !.tran 0 50m 0 1u startup
TEXT 608 -56 Left 2 ;optional
RECTANGLE Normal 752 528 512 -32 2