Version 4
SHEET 1 1304 1140
WIRE -176 -144 -416 -144
WIRE 176 -144 -176 -144
WIRE 512 -144 176 -144
WIRE 656 -144 560 -144
WIRE 768 -144 720 -144
WIRE 848 -144 768 -144
WIRE 960 -144 928 -144
WIRE 1024 -144 960 -144
WIRE 1104 -144 1024 -144
WIRE -176 -128 -176 -144
WIRE 512 -128 512 -144
WIRE 560 -128 560 -144
WIRE 768 -128 768 -144
WIRE 960 -128 960 -144
WIRE 1104 -128 1104 -144
WIRE -416 -96 -416 -144
WIRE -176 -32 -176 -48
WIRE 512 -32 512 -48
WIRE 560 -32 560 -48
WIRE 768 -32 768 -64
WIRE 960 -32 960 -64
WIRE 1104 -32 1104 -48
WIRE 176 0 176 -144
WIRE -416 48 -416 -16
WIRE -16 48 -416 48
WIRE 464 48 352 48
WIRE -416 64 -416 48
WIRE -208 128 -224 128
WIRE -128 128 -144 128
WIRE -112 128 -128 128
WIRE -16 128 -32 128
WIRE 464 128 352 128
WIRE 512 128 512 64
WIRE 512 128 464 128
WIRE 512 144 512 128
WIRE -416 160 -416 144
WIRE -128 208 -128 128
WIRE -16 208 -128 208
WIRE 368 208 352 208
WIRE 464 208 464 128
WIRE 464 208 448 208
WIRE 512 240 512 224
WIRE 1024 256 1024 -144
WIRE -112 288 -176 288
WIRE -16 288 -32 288
WIRE 368 288 352 288
WIRE 464 288 448 288
WIRE -160 368 -176 368
WIRE -16 368 -80 368
WIRE 464 368 464 352
WIRE 464 368 352 368
WIRE 1024 368 1024 336
WIRE 1024 368 464 368
WIRE 1024 384 1024 368
WIRE -112 448 -176 448
WIRE -16 448 -32 448
WIRE 384 448 352 448
WIRE 1024 480 1024 464
WIRE 96 528 96 512
WIRE 256 528 256 512
FLAG -176 448 0
FLAG -176 368 0
FLAG -176 288 0
FLAG 512 240 0
FLAG 96 528 0
FLAG 256 528 0
FLAG 960 -32 0
FLAG 768 -32 0
FLAG 560 -32 0
FLAG 1104 -32 0
FLAG 1024 480 0
FLAG -416 160 0
FLAG -176 -32 0
FLAG -224 128 0
FLAG -176 -144 IN
FLAG 1104 -144 OUT
SYMBOL res -16 432 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 40K
SYMBOL res -64 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 40K
SYMBOL res -16 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 178K
SYMBOL res -16 144 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 52.3K
SYMBOL res 496 128 R0
SYMATTR InstName R5
SYMATTR Value 10m
SYMBOL nmos 464 -32 R0
SYMATTR InstName Q1
SYMATTR Value Si7868DP
SYMBOL cap 448 352 M180
WINDOW 0 31 53 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C1
SYMATTR Value .002µ
SYMBOL res 464 272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 4.7K
SYMBOL ind2 496 -144 R0
WINDOW 0 -8 37 Right 2
WINDOW 3 -5 77 Right 2
SYMATTR InstName L1
SYMATTR Value 100µ
SYMATTR Type ind
SYMBOL ind2 576 -144 M0
WINDOW 0 -1 35 Right 2
WINDOW 3 -7 80 Right 2
SYMATTR InstName L2
SYMATTR Value 100µ
SYMATTR Type ind
SYMBOL diode 656 -128 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MURS120
SYMBOL diode 752 -64 M180
WINDOW 0 32 57 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value MURS120
SYMBOL ind 832 -128 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L3
SYMATTR Value 4µ
SYMATTR SpiceLine Rpar=1K
SYMBOL cap 944 -128 R0
SYMATTR InstName C2
SYMATTR Value 20µ
SYMATTR SpiceLine Rser=10m
SYMBOL res 1008 240 R0
SYMATTR InstName R7
SYMATTR Value 43.7K
SYMBOL res 1008 368 R0
SYMATTR InstName R8
SYMATTR Value 4.99K
SYMBOL res -432 0 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R9
SYMATTR Value 178K
SYMBOL res -432 160 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R10
SYMATTR Value {178K/10}
SYMBOL voltage -176 -144 R0
SYMATTR InstName V1
SYMATTR Value 20
SYMBOL cap -144 112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value .005µ
SYMBOL res 464 224 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R11
SYMATTR Value 1K
SYMBOL PowerProducts\\LT1952-1 176 240 R0
SYMATTR InstName U1
SYMBOL res 1088 -144 R0
SYMATTR InstName Rload
SYMATTR Value 5
TEXT 472 -168 Left 2 !K1 L1 L2 1
TEXT 464 424 Left 2 !.tran 1.2m startup