* SPICE netlist
XU1 0 N013 N023 N015 N021 N005 N016 N018 0 N012 N009 MP_01 MP_02 N010 N001 N002 LTC3705 ;pnba GND)IS)VSLMT)UVLO)SSFLT)Ndrv)FB/IN+)FS/IN-)PGND)BG)Vcc)))Boost)TG)TS
R1 N018 0 100K
MQ1 IN N005 N009 N009 BSS123
R2 IN N005 100K
R3 IN N015 365K
R4 N015 0 15K
V1 IN 0 50
C1 N009 0 2.2
MQ2 N006 N012 N013 N013 Si4484EY
R5 N013 0 25m
MQ3 IN N001 N002 N002 Si4484EY
L1 N006 N002 500
L2 0 N003 281
C2 N002 N010 .22
D1 N009 N010 1N914
D2 N006 IN MBR20100CT
D3 0 N002 MBR20100CT
D4 N003 N004 1N5817
D5 0 N004 1N5817
C3 OUT 0 75 Rser=0.015
R6 N023 IN 301K
C4 N023 0 270p
C5 N021 0 .001
C6 N016 0 470p
XU2 N017 N014 N016 0 NC_03 MOC205 Igain=2.44m ;pnba A)K)C)E)B
XU3 N014 N019 OUT N022 0 0 N020 N011 LT1431 ;pnba Coll)Comp)V+)Rtop)GND-S)GND-F)Rmid)Ref
C7 N011 N014 {.047/5} Rser=3K Cpar={4.7u/500}
C8 OUT N017 {.018/2.5} Rpar={2K*5}
R7 OUT N011 9.53K
R8 N011 0 2.49K
C9 OUT N011 {4.7n/5} Rser=910
L3 0 N007 281
D6 N007 N008 1N5817
D7 0 N008 1N5817
L4 N009 N008 1m
Rload OUT 0 6
L5 N004 OUT 25
K1 L1 L2 L3 1.
.tran 600u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2240 896
WIRE -1040 -448 -1120 -448
WIRE -672 -448 -1040 -448
WIRE -512 -448 -672 -448
WIRE -208 -448 -512 -448
WIRE -32 -448 -208 -448
WIRE -1120 -432 -1120 -448
WIRE -208 -432 -208 -448
WIRE -32 -432 -32 -448
WIRE -512 -384 -512 -448
WIRE -256 -352 -352 -352
WIRE -1120 -336 -1120 -352
WIRE -672 -320 -672 -448
WIRE -208 -320 -208 -336
WIRE -208 -320 -272 -320
WIRE 48 -320 -208 -320
WIRE 144 -320 96 -320
WIRE 224 -320 208 -320
WIRE 256 -320 224 -320
WIRE 368 -320 336 -320
WIRE 528 -320 368 -320
WIRE 640 -320 528 -320
WIRE -208 -304 -208 -320
WIRE 48 -304 48 -320
WIRE 96 -304 96 -320
WIRE 368 -304 368 -320
WIRE 528 -304 528 -320
WIRE 224 -288 224 -320
WIRE -512 -240 -512 -304
WIRE -512 -240 -624 -240
WIRE -208 -224 -208 -240
WIRE -32 -208 -32 -368
WIRE 48 -208 48 -224
WIRE 48 -208 -32 -208
WIRE 96 -208 96 -224
WIRE 224 -208 224 -224
WIRE 224 -208 96 -208
WIRE 368 -208 368 -240
WIRE 368 -208 224 -208
WIRE 528 -208 528 -224
WIRE 528 -208 368 -208
WIRE -32 -192 -32 -208
WIRE 528 -192 528 -208
WIRE -928 -144 -992 -144
WIRE -832 -144 -864 -144
WIRE -784 -144 -832 -144
WIRE -672 -144 -672 -224
WIRE -672 -144 -704 -144
WIRE -624 -144 -672 -144
WIRE -432 -144 -560 -144
WIRE -272 -144 -272 -320
WIRE -272 -144 -368 -144
WIRE -992 -128 -992 -144
WIRE -832 -128 -832 -144
WIRE 640 -128 640 -320
WIRE 864 -128 640 -128
WIRE 1008 -128 928 -128
WIRE -80 -112 -192 -112
WIRE -32 -96 -112 -96
WIRE -32 -80 -32 -96
WIRE -512 -64 -512 -240
WIRE -432 -64 -432 -144
WIRE -352 -64 -352 -352
WIRE -272 -64 -272 -144
WIRE -192 -64 -192 -112
WIRE -112 -64 -112 -96
WIRE -832 -48 -832 -64
WIRE 640 -48 640 -128
WIRE 720 -48 640 -48
WIRE 1008 -48 1008 -128
WIRE 1008 -48 800 -48
WIRE 1024 -48 1008 -48
WIRE 1120 -48 1104 -48
WIRE -992 -32 -992 -48
WIRE 816 0 688 0
WIRE 1008 0 1008 -48
WIRE 1008 0 880 0
WIRE -1040 16 -1040 -448
WIRE -944 16 -1040 16
WIRE -768 16 -864 16
WIRE -560 16 -768 16
WIRE -32 16 -32 0
WIRE -768 32 -768 16
WIRE 48 48 -64 48
WIRE 144 48 48 48
WIRE 416 48 336 48
WIRE 640 48 640 -48
WIRE 640 48 480 48
WIRE 48 64 48 48
WIRE 144 112 128 112
WIRE -768 128 -768 112
WIRE -672 128 -672 -144
WIRE -560 128 -672 128
WIRE 48 144 48 128
WIRE 688 144 688 0
WIRE 688 144 336 144
WIRE 720 144 688 144
WIRE 1008 144 1008 0
WIRE 1008 144 976 144
WIRE -1040 208 -1040 16
WIRE -672 208 -672 192
WIRE -16 208 -64 208
WIRE 720 208 688 208
WIRE 1008 208 976 208
WIRE -16 224 -16 208
WIRE -560 240 -640 240
WIRE -640 256 -640 240
WIRE 640 272 640 48
WIRE 720 272 640 272
WIRE 1008 272 976 272
WIRE -16 320 -16 304
WIRE -304 336 -304 320
WIRE -160 336 -160 320
WIRE 720 336 688 336
WIRE 1008 336 976 336
WIRE -1040 368 -1040 288
WIRE -448 368 -448 320
WIRE -448 368 -1040 368
WIRE -448 448 -448 432
FLAG -160 336 0
FLAG -304 336 0
FLAG -16 320 0
FLAG -768 128 0
FLAG -1120 -336 0
FLAG -672 208 0
FLAG -32 16 0
FLAG -208 -224 0
FLAG 528 -192 0
FLAG 48 144 0
FLAG -448 448 0
FLAG -640 320 0
FLAG 128 112 0
FLAG 1008 336 0
FLAG 1008 272 0
FLAG 1120 -48 0
FLAG 528 -320 OUT
FLAG -992 -32 0
FLAG -832 -48 0
FLAG -1120 -448 IN
SYMBOL PowerProducts\\LTC3705 -304 128 R0
SYMATTR InstName U1
SYMBOL res -32 208 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL nmos -624 -320 M0
SYMATTR InstName Q1
SYMATTR Value BSS123
SYMBOL res -528 -400 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL res -960 32 R270
SYMATTR InstName R3
SYMATTR Value 365K
SYMBOL res -784 16 R0
SYMATTR Value 15K
SYMATTR InstName R4
SYMBOL voltage -1120 -448 R0
SYMATTR InstName V1
SYMATTR Value 50
SYMBOL cap -688 128 R0
SYMATTR InstName C1
SYMATTR Value 2.2
SYMBOL nmos -80 -192 R0
SYMATTR InstName Q2
SYMATTR Value Si4484EY
SYMBOL res -48 -96 R0
SYMATTR InstName R5
SYMATTR Value 25m
SYMBOL nmos -256 -432 R0
SYMATTR InstName Q3
SYMATTR Value Si4484EY
SYMBOL ind2 32 -208 M180
SYMATTR InstName L1
SYMATTR Value 500
SYMATTR Type ind
SYMBOL ind2 112 -208 R180
SYMATTR InstName L2
SYMATTR Value 281
SYMATTR Type ind
SYMBOL cap -368 -160 R90
SYMATTR InstName C2
SYMATTR Value .22
SYMBOL diode -624 -128 R270
SYMATTR InstName D1
SYMATTR Value 1N914
SYMBOL schottky -48 -368 M180
SYMATTR InstName D2
SYMATTR Value MBR20100CT
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -224 -240 M180
SYMATTR InstName D3
SYMATTR Value MBR20100CT
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 144 -304 R270
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 208 -224 M180
SYMATTR InstName D5
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 352 -304 R0
SYMATTR Value 75
SYMATTR SpiceLine Rser=0.015
SYMATTR InstName C3
SYMBOL res -1056 304 M180
SYMATTR InstName R6
SYMATTR Value 301K
SYMBOL cap -464 368 R0
SYMATTR InstName C4
SYMATTR Value 270p
SYMBOL cap -656 256 R0
SYMATTR InstName C5
SYMATTR Value .001
SYMBOL cap 32 64 R0
SYMATTR InstName C6
SYMATTR Value 470p
SYMBOL optos\\MOC207 240 112 M0
SYMATTR InstName U2
SYMBOL LT1431 848 240 R0
SYMATTR InstName U3
SYMBOL cap 880 -16 R90
SYMATTR InstName C7
SYMATTR Value {.047/5}
SYMATTR Value2 Rser=3K
SYMATTR SpiceLine Cpar={4.7u/500}
SYMBOL cap 480 32 R90
SYMATTR InstName C8
SYMATTR Value {.018/2.5}
SYMATTR SpiceLine Rpar={2K*5}
SYMBOL res 704 -32 R270
SYMATTR InstName R7
SYMATTR Value 9.53K
SYMBOL res 1008 -32 R270
SYMATTR InstName R8
SYMATTR Value 2.49K
SYMBOL cap 864 -112 R270
SYMATTR Value2 Rser=910
SYMATTR InstName C9
SYMATTR Value {4.7n/5}
SYMBOL ind2 -976 -32 R180
SYMATTR InstName L3
SYMATTR Value 281
SYMATTR Type ind
SYMBOL schottky -928 -128 R270
SYMATTR InstName D6
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -848 -64 M180
SYMATTR InstName D7
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL ind -688 -128 M270
SYMATTR InstName L4
SYMATTR Value 1m
SYMBOL res 512 -320 R0
SYMATTR InstName Rload
SYMATTR Value 6
SYMBOL ind2 240 -304 R270
SYMATTR InstName L5
SYMATTR Value 25
SYMATTR Type ind