Version 4
SHEET 1 1272 680
WIRE -544 80 -752 80
WIRE -256 80 -544 80
WIRE 16 80 -256 80
WIRE 192 80 112 80
WIRE 288 80 192 80
WIRE 400 80 288 80
WIRE 496 80 400 80
WIRE -752 96 -752 80
WIRE 192 96 192 80
WIRE 400 96 400 80
WIRE 496 96 496 80
WIRE -256 144 -256 80
WIRE -224 144 -256 144
WIRE 32 144 32 128
WIRE 32 144 0 144
WIRE -544 176 -544 80
WIRE 288 176 288 80
WIRE -752 192 -752 176
WIRE 400 192 400 160
WIRE 496 192 496 176
WIRE -256 208 -256 144
WIRE -224 208 -256 208
WIRE 192 208 192 176
WIRE 192 208 0 208
WIRE -544 272 -544 256
WIRE -224 272 -544 272
WIRE 288 272 288 256
WIRE 288 272 0 272
WIRE -544 288 -544 272
WIRE 288 288 288 272
WIRE -224 336 -288 336
WIRE 16 336 0 336
WIRE -288 352 -288 336
WIRE -336 368 -432 368
WIRE 240 368 176 368
WIRE -544 384 -544 368
WIRE 176 384 176 368
WIRE 288 400 288 384
WIRE -160 416 -160 400
WIRE -80 416 -80 400
WIRE -432 432 -432 368
WIRE -288 448 -288 432
WIRE 176 480 176 464
WIRE -80 496 -80 480
WIRE -432 528 -432 512
FLAG -160 416 0
FLAG -80 496 0
FLAG -752 192 0
FLAG 288 400 0
FLAG 176 480 0
FLAG 400 192 0
FLAG 496 192 0
FLAG 496 80 OUT
FLAG 16 336 PGD
FLAG -544 384 0
FLAG -752 80 IN
FLAG -288 448 0
FLAG -432 528 0
FLAG -336 416 0
SYMBOL cap -96 416 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL voltage -432 416 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR Value PULSE(0 2 3 1u 1u 1 3 4)
SYMATTR InstName V1
SYMBOL voltage -752 80 R0
WINDOW 123 24 146 Left 2
WINDOW 39 24 125 Left 2
SYMATTR Value PWL(0 0 1 5)
SYMATTR InstName V2
SYMBOL res 176 80 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL res 272 160 R0
SYMATTR InstName R3
SYMATTR Value 100K
SYMBOL cap 384 96 R0
SYMATTR InstName C3
SYMATTR Value 1µ
SYMBOL nmos 240 288 R0
SYMATTR InstName Q1
SYMATTR Value 2N7002
SYMBOL res -560 160 R0
SYMATTR InstName R1
SYMATTR Value 1860K
SYMBOL res -560 272 R0
SYMATTR InstName R5
SYMATTR Value 402K
SYMBOL sw -288 448 M180
WINDOW 0 16 97 Left 2
WINDOW 3 16 15 Left 2
SYMATTR InstName S1
SYMBOL voltage 176 368 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR Value PULSE(0 2 3.05 1u 1u 0.1 6 2)
SYMATTR InstName V3
SYMBOL pmos 112 128 M270
WINDOW 0 52 44 VTop 2
WINDOW 3 -16 74 VLeft 2
SYMATTR InstName Q2
SYMATTR Value IRF7210
SYMBOL LTC2955-2 -112 272 R0
SYMATTR InstName U1
SYMBOL res 480 80 R0
SYMATTR InstName Rload
SYMATTR Value 100
TEXT 248 520 Left 2 !.tran 15
TEXT 24 576 Left 2 !.model SW SW(Ron=100 Roff=1G Vt=0.5 Vh=-.1)