Version 4
SHEET 1 1164 680
WIRE 0 96 -48 96
WIRE 80 96 0 96
WIRE 224 96 144 96
WIRE 288 96 224 96
WIRE 752 96 288 96
WIRE 896 96 752 96
WIRE 1088 96 896 96
WIRE 896 128 896 96
WIRE 752 160 752 96
WIRE 1088 176 1088 96
WIRE 224 272 224 96
WIRE 896 272 896 208
WIRE -48 304 -48 96
WIRE 496 304 496 256
WIRE 752 352 752 240
WIRE 752 352 656 352
WIRE 848 352 752 352
WIRE 656 384 656 352
WIRE 752 400 752 352
WIRE 496 432 496 384
WIRE 592 432 496 432
WIRE 496 448 496 432
WIRE -48 544 -48 384
WIRE 224 544 224 336
WIRE 224 544 -48 544
WIRE 496 544 496 528
WIRE 496 544 224 544
WIRE 656 544 656 480
WIRE 656 544 496 544
WIRE 752 544 752 464
WIRE 752 544 656 544
WIRE 896 544 896 368
WIRE 896 544 752 544
WIRE 1088 544 1088 256
WIRE 1088 544 896 544
WIRE -48 560 -48 544
FLAG -48 560 0
FLAG 0 96 Uin
FLAG 288 96 Uout
FLAG 496 256 Uin
SYMBOL diode 80 112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMBOL cap 208 272 R0
SYMATTR InstName C1
SYMATTR Value 5000µ
SYMBOL Misc\\EuropeanResistor 1072 160 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL Misc\\EuropeanResistor 880 112 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL nmos 848 272 R0
SYMATTR InstName M1
SYMATTR Value STN3N45K3
SYMBOL voltage -48 288 R0
WINDOW 3 75 -90 VRight 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 350 0 5m 1m 1)
SYMBOL Misc\\EuropeanResistor 736 144 R0
SYMATTR InstName R3
SYMATTR Value 300k
SYMBOL zener 768 464 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -24 -54 VRight 2
SYMATTR InstName D2
SYMATTR Value BZX84C15L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL npn 592 384 R0
SYMATTR InstName Q1
SYMBOL Misc\\EuropeanResistor 480 432 R0
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 480 288 R0
SYMATTR InstName R5
SYMATTR Value 1000k
TEXT 182 -6 Left 2 !.tran 25