* SPICE netlist
S1 0 OUT N002 0 SHORT
V1 IN 0 PWL(0 0 1m 12 20m 12 20.2m 80 30m 45 43m 26.9 80m 12)
V2 N002 0 PWL(0 0 150m 0 151m 5 170m 5 171m 0)
R1 IN N011 383K
R2 N011 0 100K
R3 IN N001 10m
R4 N003 N005 10
R5 OUT N012 102K
R6 N012 0 4.99K
C1 N004 0 22
C2 N013 0 .22
R7 OUT N004 .05
R8 OUT N007 27K
R9 OUT N010 27K
R10 IN N009 27K
C3 N005 0 .0068
MQ1 N001 N003 OUT OUT IRF1310
R11 OUT 0 10
XU1 N013 N012 OUT N005 N001 IN N006 N010 N007 0 N009 N011 LT4356-3 ;pnba TMR)FB)OUT)Gate)SNS)Vcc)_SHDN)_FLT)EN)GND)Aout)IN+
V3 N008 0 PWL(0 0 90m 0 90.1m 5 100m 5 100.1m 0)
MQ2 N006 N008 0 0 SUD40N10-25
R12 IN N006 10K
.tran 200m

* LTspice schematic (.asc)
Version 4
SHEET 1 2144 720
WIRE -720 -360 -816 -360
WIRE -608 -360 -720 -360
WIRE -512 -360 -608 -360
WIRE -384 -360 -512 -360
WIRE -368 -360 -384 -360
WIRE -272 -360 -288 -360
WIRE -144 -360 -272 -360
WIRE 64 -360 -48 -360
WIRE 160 -360 64 -360
WIRE 256 -360 160 -360
WIRE 336 -360 256 -360
WIRE 432 -360 336 -360
WIRE 528 -360 432 -360
WIRE 656 -360 528 -360
WIRE 432 -344 432 -360
WIRE 528 -344 528 -360
WIRE 656 -344 656 -360
WIRE -416 -328 -384 -360
WIRE -240 -328 -272 -360
WIRE 960 -328 704 -328
WIRE 1072 -328 1040 -328
WIRE 256 -312 256 -360
WIRE -64 -296 -64 -312
WIRE -720 -280 -720 -360
WIRE -608 -280 -608 -360
WIRE -512 -280 -512 -360
WIRE 720 -280 704 -280
WIRE 432 -248 432 -264
WIRE 528 -248 528 -264
WIRE 656 -248 656 -264
WIRE 336 -216 336 -360
WIRE 160 -200 160 -360
WIRE -160 -184 -176 -184
WIRE -64 -184 -64 -216
WIRE -64 -184 -96 -184
WIRE 432 -168 432 -184
WIRE -512 -136 -512 -200
WIRE -512 -136 -1008 -136
WIRE -416 -136 -416 -328
WIRE -240 -136 -240 -328
WIRE -64 -136 -64 -184
WIRE 64 -136 64 -360
WIRE -1008 -120 -1008 -136
WIRE -512 -56 -512 -136
WIRE -496 -56 -512 -56
WIRE 256 -56 256 -232
WIRE 256 -56 128 -56
WIRE -1056 -40 -1072 -40
WIRE -608 8 -608 -200
WIRE -496 8 -608 8
WIRE 336 8 336 -136
WIRE 336 8 128 8
WIRE -720 72 -720 -200
WIRE -496 72 -720 72
WIRE 160 72 160 -120
WIRE 160 72 128 72
WIRE -720 88 -720 72
WIRE 160 104 160 72
WIRE -64 152 -64 136
WIRE -304 168 -304 136
WIRE -816 184 -816 -360
WIRE -720 184 -720 168
WIRE 160 216 160 184
WIRE -64 232 -64 216
WIRE -1072 264 -1072 -40
WIRE -816 280 -816 264
WIRE -1072 360 -1072 344
FLAG -816 280 0
FLAG -816 -360 IN
FLAG 656 -360 OUT
FLAG 720 -280 0
FLAG -176 -184 0
FLAG -720 184 0
FLAG -304 168 0
FLAG -64 232 0
FLAG 160 216 0
FLAG 432 -168 0
FLAG 528 -248 0
FLAG 656 -248 0
FLAG 1072 -328 0
FLAG -1072 360 0
FLAG -1008 -24 0
SYMBOL SW 656 -248 R180
SYMATTR InstName S1
SYMATTR Value SHORT
SYMBOL voltage -816 168 R0
SYMATTR Value PWL(0 0 1m 12 20m 12 20.2m 80 30m 45 43m 26.9 80m 12)
SYMATTR InstName V1
SYMBOL voltage 944 -328 M90
SYMATTR Value PWL(0 0 150m 0 151m 5 170m 5 171m 0)
SYMATTR InstName V2
SYMBOL res -736 -296 R0
SYMATTR InstName R1
SYMATTR Value 383K
SYMBOL res -736 72 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -384 -344 R270
SYMATTR InstName R3
SYMATTR Value 10m
SYMBOL res -80 -312 R0
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL res 144 -216 R0
SYMATTR InstName R5
SYMATTR Value 102K
SYMBOL res 144 88 R0
SYMATTR InstName R6
SYMATTR Value 4.99K
SYMBOL cap 416 -248 R0
SYMATTR InstName C1
SYMATTR Value 22
SYMBOL cap -80 152 R0
SYMATTR InstName C2
SYMATTR Value .22
SYMBOL res 416 -360 R0
SYMATTR InstName R7
SYMATTR Value .05
SYMBOL res 240 -328 R0
SYMATTR InstName R8
SYMATTR Value 27K
SYMBOL res 320 -232 R0
SYMATTR InstName R9
SYMATTR Value 27K
SYMBOL res -624 -296 R0
SYMATTR InstName R10
SYMATTR Value 27K
SYMBOL cap -96 -200 R90
SYMATTR Value .0068
SYMATTR InstName C3
SYMBOL nmos -144 -312 R270
SYMATTR InstName Q1
SYMATTR Value IRF1310
SYMBOL res 512 -360 R0
SYMATTR InstName R11
SYMATTR Value 10
SYMBOL LT4356-3 -192 24 R0
SYMATTR InstName U1
SYMBOL voltage -1072 248 R0
SYMATTR InstName V3
SYMATTR Value PWL(0 0 90m 0 90.1m 5 100m 5 100.1m 0)
SYMBOL nmos -1056 -120 R0
SYMATTR InstName Q2
SYMATTR Value SUD40N10-25
SYMBOL res -528 -296 R0
SYMATTR InstName R12
SYMATTR Value 10K