Version 4
SHEET 1 948 680
WIRE 128 -80 96 -80
WIRE 224 -80 128 -80
WIRE 352 -80 224 -80
WIRE 576 -80 352 -80
WIRE 624 -80 576 -80
WIRE 768 -80 720 -80
WIRE 848 -80 768 -80
WIRE 224 -32 224 -80
WIRE 352 32 352 -80
WIRE 576 64 576 -80
WIRE 224 80 224 48
WIRE 288 80 224 80
WIRE 848 96 848 -80
WIRE 224 112 224 80
WIRE 128 144 128 -80
WIRE 352 208 352 128
WIRE 576 208 576 128
WIRE 576 208 352 208
WIRE 640 208 640 -32
WIRE 640 208 576 208
WIRE 224 256 224 192
WIRE 224 256 208 256
WIRE 576 272 576 208
WIRE 128 304 128 208
WIRE 144 304 128 304
WIRE 128 368 128 304
WIRE 128 480 128 448
FLAG 128 480 0
FLAG 208 352 0
FLAG 576 352 0
FLAG 848 176 0
FLAG -320 80 0
FLAG 96 -80 VIN
FLAG 768 -80 VOUT
FLAG -320 0 VIN
SYMBOL zener 144 208 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value DFLZ33
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL npn 144 256 R0
SYMATTR InstName Q1
SYMATTR Value BC847C
SYMBOL pnp 288 128 M180
SYMATTR InstName Q2
SYMATTR Value BC857C
SYMBOL res 560 256 R0
SYMATTR InstName R2
SYMATTR Value 22k
SYMBOL pmos 720 -32 M270
SYMATTR InstName M1
SYMATTR Value FDS4559_P
SYMBOL res 208 96 R0
SYMATTR InstName R3
SYMATTR Value 22k
SYMBOL res 112 352 R0
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL zener 592 128 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D3
SYMATTR Value BZX84C12L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 208 -48 R0
SYMATTR InstName R5
SYMATTR Value 100k
SYMBOL res 832 80 R0
SYMATTR InstName R1
SYMATTR Value 100
SYMBOL voltage -320 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 55 0 10m 10m 0 20m)
TEXT -354 504 Left 2 !.tran 20m