* SPICE netlist
C1 N004 0 1
L1 IN N001 22 Rser=10m Rpar=2K
R2 N002 N006 1Meg
R3 N006 0 16.9K
D1 N001 N002 MBRS360
R4 N002 N008 .5
C2 N002 0 2.2 x5 Rser=10m
V1 IN 0 PWL(0 0 .2m 24)
R5 IN N003 332K
R6 N003 0 100K
C3 N014 0 4700p Rser=20K
C4 N013 0 .01
R7 N009 0 28.7K tol=1 pwr=0.1
D4 N008 N011 LXK2-PW14 N=12
C5 N015 0 47n
MQ2 N011 N010 0 0 IRF1310
V2 N012 0 4
R8 N012 N013 124K
XU1 N005 N015 NC_01 N013 N009 N003 N004 IN N001 N010 N010 N006 N008 N002 N014 N007 0 0 0 LT3955 ;pnba Vref)PWM)_Vmode)DIM/SS)Rt)EN/UVLO)INTVcc)Vin)SW)SYNC)PWMout)FB)ISN)ISP)Vc)CTRL)GND)PGND)GNDK
R9 IN N007 332K
R10 N007 0 40.2K
.tran 25m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1232 672
WIRE -360 -336 -616 -336
WIRE -264 -336 -360 -336
WIRE -8 -336 -264 -336
WIRE 136 -336 -8 -336
WIRE 296 -336 216 -336
WIRE 328 -336 296 -336
WIRE 424 -336 392 -336
WIRE 488 -336 424 -336
WIRE 616 -336 488 -336
WIRE -616 -320 -616 -336
WIRE -360 -320 -360 -336
WIRE 488 -320 488 -336
WIRE -8 -288 -8 -336
WIRE 488 -240 488 -256
WIRE -616 -224 -616 -240
WIRE -360 -224 -360 -240
WIRE -184 -224 -360 -224
WIRE 184 -224 168 -224
WIRE 264 -224 248 -224
WIRE -360 -208 -360 -224
WIRE 424 -192 424 -336
WIRE 296 -160 296 -336
WIRE 296 -160 168 -160
WIRE -264 -128 -264 -336
WIRE -360 -112 -360 -128
WIRE 616 -112 616 -336
WIRE 616 -112 536 -112
WIRE -184 -96 -200 -96
WIRE 424 -96 424 -112
WIRE 424 -96 168 -96
WIRE 616 -96 616 -112
WIRE 424 -80 424 -96
WIRE -376 -32 -392 -32
WIRE -264 -32 -264 -48
WIRE -264 -32 -296 -32
WIRE -184 -32 -264 -32
WIRE 312 -32 168 -32
WIRE 616 0 616 -16
WIRE 616 0 552 0
WIRE 424 16 424 0
WIRE -280 32 -296 32
WIRE -184 32 -200 32
WIRE 248 32 168 32
WIRE 616 32 616 0
WIRE 312 48 312 -32
WIRE 536 48 536 -112
WIRE 536 48 312 48
WIRE 248 64 248 32
WIRE 552 64 552 0
WIRE 552 64 248 64
WIRE -184 96 -328 96
WIRE 200 96 168 96
WIRE 616 144 616 96
WIRE -504 160 -568 160
WIRE -392 160 -424 160
WIRE -184 160 -392 160
WIRE 216 160 168 160
WIRE 296 160 280 160
WIRE -568 176 -568 160
WIRE -392 176 -392 160
WIRE -280 224 -296 224
WIRE -184 224 -216 224
WIRE 200 224 168 224
WIRE 568 224 200 224
WIRE -392 256 -392 240
WIRE 616 256 616 240
WIRE -568 272 -568 256
WIRE -56 304 -56 288
WIRE 40 304 40 288
WIRE -328 336 -328 96
WIRE 200 336 200 224
WIRE 200 336 -328 336
FLAG 264 -224 0
FLAG 424 16 0
FLAG 488 -240 0
FLAG -616 -224 0
FLAG -360 -112 0
FLAG 296 160 0
FLAG -296 32 0
FLAG -56 304 0
FLAG -616 -336 IN
FLAG 616 256 0
FLAG -392 256 0
FLAG -296 224 0
FLAG -568 272 0
FLAG 40 304 0
FLAG -392 -32 0
FLAG 200 96 0
SYMBOL cap 184 -208 R270
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL ind 120 -320 R270
SYMATTR InstName L1
SYMATTR Value 22
SYMATTR SpiceLine Rser=10m Rpar=2K
SYMBOL res 408 -208 R0
SYMATTR InstName R2
SYMATTR Value 1Meg
SYMBOL res 408 -96 R0
SYMATTR InstName R3
SYMATTR Value 16.9K
SYMBOL schottky 328 -320 R270
SYMATTR InstName D1
SYMATTR Value MBRS360
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 600 -112 R0
SYMATTR InstName R4
SYMATTR Value .5
SYMBOL cap 472 -320 R0
SYMATTR Value2 x5
SYMATTR InstName C2
SYMATTR Value 2.2
SYMATTR SpiceLine Rser=10m
SYMBOL voltage -616 -336 R0
SYMATTR Value PWL(0 0 .2m 24)
SYMATTR InstName V1
SYMBOL res -376 -336 R0
SYMATTR InstName R5
SYMATTR Value 332K
SYMBOL res -376 -224 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL cap 216 144 M90
SYMATTR InstName C3
SYMATTR Value 4700p
SYMATTR SpiceLine Rser=20K
SYMBOL cap -408 176 R0
SYMATTR InstName C4
SYMATTR Value .01
SYMBOL res -184 16 R90
SYMATTR InstName R7
SYMATTR Value 28.7K
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL LED 600 32 R0
SYMATTR Value LXK2-PW14
SYMATTR Value2 N=12
SYMATTR InstName D4
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap -216 208 R90
SYMATTR InstName C5
SYMATTR Value 47n
SYMBOL nmos 568 144 R0
SYMATTR InstName Q2
SYMATTR Value IRF1310
SYMBOL voltage -568 160 R0
SYMATTR InstName V2
SYMATTR Value 4
SYMBOL res -520 176 R270
SYMATTR InstName R8
SYMATTR Value 124K
SYMBOL PowerProducts\\LT3955 -8 0 R0
SYMATTR InstName U1
SYMBOL res -280 -144 R0
SYMATTR InstName R9
SYMATTR Value 332K
SYMBOL res -280 -48 R90
SYMATTR InstName R10
SYMATTR Value 40.2K