Version 4
SHEET 1 880 680
WIRE 256 16 32 16
WIRE 480 16 256 16
WIRE 256 80 256 16
WIRE 32 96 32 16
WIRE 208 160 128 160
WIRE 32 192 32 176
WIRE 128 192 128 160
WIRE 128 192 32 192
WIRE 144 192 128 192
WIRE 256 192 256 176
WIRE 256 192 208 192
WIRE 256 208 256 192
WIRE 32 224 32 192
WIRE 128 224 128 192
WIRE 208 224 128 224
WIRE 480 224 480 16
WIRE 32 336 32 304
WIRE 32 336 -448 336
WIRE 32 352 32 336
WIRE -544 432 -576 432
WIRE -496 432 -544 432
WIRE 144 432 80 432
WIRE 160 432 144 432
WIRE 256 432 256 304
WIRE 256 432 240 432
WIRE 352 432 256 432
WIRE 528 432 432 432
WIRE 624 432 528 432
WIRE 688 432 624 432
WIRE -208 448 -272 448
WIRE -576 464 -576 432
WIRE -272 464 -272 448
WIRE 64 464 -160 464
WIRE 144 464 144 432
WIRE 144 464 64 464
WIRE 528 464 528 432
WIRE 624 464 624 432
WIRE 144 480 144 464
WIRE -448 496 -448 336
WIRE -160 496 -160 464
WIRE 64 496 64 464
WIRE -496 512 -496 432
WIRE -208 512 -208 448
WIRE -576 576 -576 544
WIRE -496 576 -496 560
WIRE -496 576 -576 576
WIRE -448 576 -496 576
WIRE -272 576 -272 544
WIRE -272 576 -448 576
WIRE -208 576 -208 560
WIRE -208 576 -272 576
WIRE -160 576 -208 576
WIRE 32 576 32 448
WIRE 32 576 -160 576
WIRE 64 576 64 560
WIRE 64 576 32 576
WIRE 144 576 144 560
WIRE 144 576 64 576
WIRE 480 576 480 304
WIRE 480 576 144 576
WIRE 528 576 528 528
WIRE 528 576 480 576
WIRE 624 576 624 544
WIRE 624 576 528 576
FLAG 480 576 0
FLAG 688 432 OUT
FLAG -544 432 ON
FLAG -272 448 OFF
SYMBOL pmos 208 304 M180
SYMATTR InstName M1
SYMATTR Value Si4433DY
SYMBOL nmos 80 352 M0
SYMATTR InstName M3
SYMATTR Value IRF7309N
SYMBOL res 608 448 R0
SYMATTR InstName R_LOAD
SYMATTR Value 10
SYMBOL voltage 480 208 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 30
SYMBOL res 16 208 R0
SYMATTR InstName R4
SYMATTR Value 100
SYMBOL res 256 416 R90
WINDOW 0 6 56 VBottom 2
WINDOW 3 26 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL res 128 464 R0
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL sw -448 592 M180
WINDOW 0 45 57 Left 2
SYMATTR InstName S1
SYMATTR Value MySW
SYMBOL sw -160 592 M180
WINDOW 0 45 54 Left 2
SYMATTR InstName S2
SYMATTR Value MySW
SYMBOL voltage -576 448 R0
WINDOW 3 -157 165 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 15m 1u 1u 25m 1)
SYMATTR InstName V3
SYMBOL voltage -272 448 R0
WINDOW 3 -106 170 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 400m 1u 1u 100m 1)
SYMATTR InstName V2
SYMBOL res 16 80 R0
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL pmos 208 80 R0
SYMATTR InstName M2
SYMATTR Value Si4433DY
SYMBOL res 448 416 R90
WINDOW 0 6 56 VBottom 2
WINDOW 3 26 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1
SYMBOL zener 144 176 M90
WINDOW 0 -25 30 VBottom 2
WINDOW 3 5 188 VTop 2
SYMATTR InstName D1
SYMATTR Value BZX84C10L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL zener 48 560 M180
WINDOW 0 24 64 Left 2
WINDOW 3 -18 -37 Left 2
SYMATTR InstName D2
SYMATTR Value BZX84C10L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 512 464 R0
SYMATTR InstName C1
SYMATTR Value 1000µ
TEXT 288 608 Left 2 !.tran 2
TEXT -488 232 Left 2 !.model MySW SW(Ron=.1 Roff=1e9 Vt=2.5)