* SPICE netlist
L1 IN N003 76 Rser=.01 Cpar=1p
L2 0 N001 1 Rser=1m Cpar=2p
MQ1 N003 N005 N007 N007 Si4848DY
R1 N007 0 0.068
R2 IN N002 6.8K
D1 N001 OUT 1N5817
R3 OUT N011 105K
R4 N011 0 20K
C1 OUT 0 300 Rser=10m
C2 N002 0 10
R5 N010 N009 56K
C3 N009 0 .0047
V1 IN 0 36
Rload OUT 0 5 pwr=12
XU1 N006 N010 N011 N004 N008 0 N007 N007 N002 N005 LTC3805 ;pnba SSFLT)Ith)FB)Run)FS)GND)Isense)OC)Vcc)Gate
R6 IN N004 100K
R7 N004 0 10K
R8 N008 0 118K
C4 N006 0 .01
K1 L1 L2 1
.tran 22ms startup

* LTspice schematic (.asc)
Version 4
SHEET 1 912 560
WIRE -312 -280 -440 -280
WIRE -120 -280 -312 -280
WIRE 88 -280 -120 -280
WIRE 200 -280 136 -280
WIRE 296 -280 264 -280
WIRE 360 -280 296 -280
WIRE 456 -280 360 -280
WIRE -440 -264 -440 -280
WIRE -120 -264 -120 -280
WIRE 360 -264 360 -280
WIRE 456 -264 456 -280
WIRE 88 -248 88 -280
WIRE 136 -248 136 -280
WIRE -312 -200 -312 -280
WIRE -440 -168 -440 -184
WIRE -200 -168 -216 -168
WIRE -120 -168 -120 -184
WIRE -120 -168 -136 -168
WIRE 360 -168 360 -200
WIRE 456 -168 456 -184
WIRE 88 -152 88 -168
WIRE 136 -136 136 -168
WIRE -120 -120 -120 -168
WIRE 296 -120 296 -280
WIRE -408 -72 -456 -72
WIRE -312 -72 -312 -120
WIRE -312 -72 -328 -72
WIRE -264 -72 -312 -72
WIRE 40 -72 24 -72
WIRE -344 8 -456 8
WIRE -264 8 -280 8
WIRE 40 8 24 8
WIRE 88 8 88 -56
WIRE 88 8 40 8
WIRE 88 24 88 8
WIRE -408 88 -456 88
WIRE -264 88 -328 88
WIRE 40 88 40 8
WIRE 40 88 24 88
WIRE 88 120 88 104
WIRE -440 168 -456 168
WIRE -360 168 -376 168
WIRE -264 168 -280 168
WIRE 296 168 296 -40
WIRE 296 168 24 168
WIRE 296 184 296 168
WIRE -120 216 -120 200
WIRE 296 280 296 264
FLAG -120 216 0
FLAG 88 120 0
FLAG -440 -168 0
FLAG 136 -136 0
FLAG 360 -168 0
FLAG 456 -168 0
FLAG -456 168 0
FLAG 456 -280 OUT
FLAG 296 280 0
FLAG -216 -168 0
FLAG -440 -280 IN
FLAG -456 -72 0
FLAG -456 88 0
FLAG -456 8 0
SYMBOL ind2 72 -264 R0
SYMATTR InstName L1
SYMATTR Value 76
SYMATTR Type ind
SYMATTR SpiceLine Rser=.01 Cpar=1p
SYMBOL ind2 152 -152 R180
SYMATTR InstName L2
SYMATTR Value 1
SYMATTR Type ind
SYMATTR SpiceLine Rser=1m Cpar=2p
SYMBOL nmos 40 -152 R0
SYMATTR InstName Q1
SYMATTR Value Si4848DY
SYMBOL res 72 8 R0
SYMATTR InstName R1
SYMATTR Value 0.068
SYMBOL res -136 -280 R0
SYMATTR InstName R2
SYMATTR Value 6.8K
SYMBOL schottky 200 -264 R270
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 280 -136 R0
SYMATTR InstName R3
SYMATTR Value 105K
SYMBOL res 280 168 R0
SYMATTR InstName R4
SYMATTR Value 20K
SYMBOL cap 344 -264 R0
SYMATTR InstName C1
SYMATTR Value 300
SYMATTR SpiceLine Rser=10m
SYMBOL cap -136 -184 R90
SYMATTR InstName C2
SYMATTR Value 10
SYMBOL res -264 152 R90
SYMATTR InstName R5
SYMATTR Value 56K
SYMBOL cap -376 152 R90
SYMATTR InstName C3
SYMATTR Value .0047
SYMBOL voltage -440 -280 R0
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL res 440 -280 R0
SYMATTR InstName Rload
SYMATTR Value 5
SYMATTR SpiceLine pwr=12
SYMBOL PowerProducts\\LTC3805 -120 40 R0
SYMATTR InstName U1
SYMBOL res -328 -216 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res -312 -88 R90
SYMATTR InstName R7
SYMATTR Value 10K
SYMBOL res -312 72 R90
SYMATTR InstName R8
SYMATTR Value 118K
SYMBOL cap -280 -8 R90
SYMATTR InstName C4
SYMATTR Value .01