* 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 1 170m 1 171m 0)
R1 IN N009 383K
R2 N009 0 100K
R3 IN N001 10m
R4 N003 N005 10
R5 OUT N010 102K
R6 N010 0 4.99K
C1 N004 0 22
C2 N011 0 .22
XU1 N011 N010 OUT N005 N001 IN IN N008 N006 0 N007 N009 LT4356-1 ;pnba TMR)FB)OUT)Gate)SNS)Vcc)_SHDN)_FLT)EN)GND)Aout)IN+
R7 OUT N004 .5
R8 OUT N006 27K
R9 OUT N008 27K
R10 IN N007 27K
C3 N005 0 .0068
MQ1 N001 N003 OUT OUT IRF1310
Rload OUT 0 50
.tran 300m

* LTspice schematic (.asc)
Version 4
SHEET 1 1600 640
WIRE -704 -320 -800 -320
WIRE -608 -320 -704 -320
WIRE -528 -320 -608 -320
WIRE -400 -320 -528 -320
WIRE -384 -320 -400 -320
WIRE -288 -320 -304 -320
WIRE -160 -320 -288 -320
WIRE 48 -320 -64 -320
WIRE 144 -320 48 -320
WIRE 240 -320 144 -320
WIRE 320 -320 240 -320
WIRE 432 -320 320 -320
WIRE 528 -320 432 -320
WIRE 656 -320 528 -320
WIRE 432 -304 432 -320
WIRE 528 -304 528 -320
WIRE 656 -304 656 -320
WIRE -432 -288 -400 -320
WIRE -256 -288 -288 -320
WIRE 800 -288 704 -288
WIRE 240 -272 240 -320
WIRE 800 -272 800 -288
WIRE -80 -256 -80 -272
WIRE -608 -240 -608 -320
WIRE 720 -240 704 -240
WIRE 432 -208 432 -224
WIRE 528 -192 528 -224
WIRE 656 -192 656 -224
WIRE 320 -176 320 -320
WIRE 800 -176 800 -192
WIRE 144 -160 144 -320
WIRE -176 -144 -192 -144
WIRE -80 -144 -80 -176
WIRE -80 -144 -112 -144
WIRE 432 -128 432 -144
WIRE -432 -96 -432 -288
WIRE -256 -96 -256 -288
WIRE -80 -96 -80 -144
WIRE 48 -96 48 -320
WIRE -528 -16 -528 -320
WIRE -512 -16 -528 -16
WIRE 240 -16 240 -192
WIRE 240 -16 112 -16
WIRE -704 16 -704 -320
WIRE -608 48 -608 -160
WIRE -512 48 -608 48
WIRE 320 48 320 -96
WIRE 320 48 112 48
WIRE -704 112 -704 96
WIRE -512 112 -704 112
WIRE 144 112 144 -80
WIRE 144 112 112 112
WIRE -704 128 -704 112
WIRE 144 144 144 112
WIRE -80 192 -80 176
WIRE -320 208 -320 176
WIRE -800 224 -800 -320
WIRE -704 224 -704 208
WIRE 144 256 144 224
WIRE -80 272 -80 256
WIRE -800 320 -800 304
FLAG -800 320 0
FLAG -800 -320 IN
FLAG 656 -320 OUT
FLAG 720 -240 0
FLAG -192 -144 0
FLAG -704 224 0
FLAG -320 208 0
FLAG -80 272 0
FLAG 144 256 0
FLAG 432 -128 0
FLAG 528 -192 0
FLAG 656 -192 0
FLAG 800 -176 0
SYMBOL SW 656 -208 R180
SYMATTR InstName S1
SYMATTR Value SHORT
SYMBOL voltage -800 208 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 800 -288 R0
SYMATTR Value PWL(0 0 150m 0 151m 1 170m 1 171m 0)
SYMATTR InstName V2
SYMBOL res -720 0 R0
SYMATTR InstName R1
SYMATTR Value 383K
SYMBOL res -720 112 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -400 -304 R270
SYMATTR InstName R3
SYMATTR Value 10m
SYMBOL res -96 -272 R0
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL res 128 -176 R0
SYMATTR InstName R5
SYMATTR Value 102K
SYMBOL res 128 128 R0
SYMATTR InstName R6
SYMATTR Value 4.99K
SYMBOL cap 416 -208 R0
SYMATTR InstName C1
SYMATTR Value 22
SYMBOL cap -96 192 R0
SYMATTR InstName C2
SYMATTR Value .22
SYMBOL LT4356-1 -208 64 R0
SYMATTR InstName U1
SYMBOL res 416 -320 R0
SYMATTR InstName R7
SYMATTR Value .5
SYMBOL res 224 -288 R0
SYMATTR InstName R8
SYMATTR Value 27K
SYMBOL res 304 -192 R0
SYMATTR InstName R9
SYMATTR Value 27K
SYMBOL res -624 -256 R0
SYMATTR InstName R10
SYMATTR Value 27K
SYMBOL cap -112 -160 R90
SYMATTR Value .0068
SYMATTR InstName C3
SYMBOL nmos -160 -272 R270
SYMATTR InstName Q1
SYMATTR Value IRF1310
SYMBOL res 512 -320 R0
SYMATTR InstName Rload
SYMATTR Value 50