* SPICE netlist
MQ1 IN N003 N002 N002 IRF7303
MQ2 N008 N011 N016 N016 IRF7303
V1 IN 0 16
R1 N016 0 25m
C1 N015 0 .001
C2 N024 N023 3.3n
R2 N023 N019 100
C3 N010 0 150p
R3 N007 N010 52.3K
L1 N002 N008 1m Rser=10m Rpar=500
L2 N004 N013 1m Rser=10m Rpar=500
L3 N004 OUT 3 Rser=10m Rpar=1K
C4 OUT 0 500 Rser=.025
C5 N002 N001 .5
D1 IN N001 1N5817
XU1 IN 0 0 0 N007 N010 MP_01 N015 N019 N024 N016 N020 IN 0 N011 MP_02 MP_03 N002 N003 N001 LT3781 ;pnba _SHDN)OVLO)THERM)GSND)5Vref)FSET))SS)FB)Vc)Sense)SG)Vcc)PGND)GB)))BSTREF)TG)Vbst
D2 N008 IN 1N5818
D3 0 N002 1N5818
XU2 N005 N014 0 0 N028 N018 N026 N006 0 N009 0 N022 0 N029 N025 N017 LTC1698 ;pnba Vdd)CG)PGND)GND)OPTODRV)Vcomp)MARGIN)FB)OVPIN)PWRGD)Isnsgnd)Isns)Icomp)Vaux)SYNC)FG
R4 OUT N009 10K
C6 N025 N020 100p
R5 N025 0 1K
V2 N005 0 8
MQ3 N013 N017 N021 N021 IRF7303
R6 N021 0 .25m
R7 N021 N022 100
C7 N022 0 1000p
MQ4 N004 N014 N021 N021 IRF7303
R8 OUT N006 2K
R9 N012 N006 300
C8 N006 N018 1000p
C9 N012 N018 .022
R10 0 N006 1K
R11 N028 N027 1K
C10 N028 N027 4.7n
R12 N019 0 1K
XU3 N027 0 N007 N019 NC_04 MOC205 Igain=2.44m ;pnba A)K)C)E)B
R13 N024 N019 3K
Rload 0 OUT 2
K1 L1 L2 1.
.tran 1.6m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2240 832
WIRE -832 -416 -928 -416
WIRE -464 -416 -832 -416
WIRE -416 -416 -464 -416
WIRE -240 -416 -416 -416
WIRE -176 -416 -240 -416
WIRE -928 -400 -928 -416
WIRE -176 -384 -176 -416
WIRE -832 -352 -832 -416
WIRE -800 -352 -832 -352
WIRE -416 -352 -512 -352
WIRE -384 -352 -416 -352
WIRE -304 -352 -320 -352
WIRE -928 -304 -928 -320
WIRE -800 -304 -816 -304
WIRE -224 -304 -512 -304
WIRE -800 -256 -816 -256
WIRE -304 -256 -304 -352
WIRE -304 -256 -512 -256
WIRE -176 -256 -176 -288
WIRE -176 -256 -304 -256
WIRE -80 -256 -176 -256
WIRE 80 -256 -32 -256
WIRE 112 -256 80 -256
WIRE 224 -256 192 -256
WIRE 720 -256 224 -256
WIRE 784 -256 720 -256
WIRE 1120 -256 784 -256
WIRE -80 -240 -80 -256
WIRE -32 -240 -32 -256
WIRE 1120 -240 1120 -256
WIRE -240 -224 -240 -416
WIRE 224 -224 224 -256
WIRE 592 -224 448 -224
WIRE 720 -224 720 -256
WIRE -800 -208 -816 -208
WIRE 448 -208 448 -224
WIRE 784 -192 784 -256
WIRE 800 -192 784 -192
WIRE 896 -192 880 -192
WIRE 928 -192 896 -192
WIRE 1040 -192 1008 -192
WIRE -800 -160 -1120 -160
WIRE 80 -160 80 -256
WIRE -240 -144 -240 -160
WIRE -80 -144 -80 -160
WIRE -80 -144 -240 -144
WIRE 1120 -144 1120 -160
WIRE 224 -128 224 -160
WIRE 592 -128 592 -224
WIRE 720 -128 720 -144
WIRE -1120 -112 -1120 -160
WIRE -1088 -112 -1120 -112
WIRE -976 -112 -1008 -112
WIRE -800 -112 -976 -112
WIRE -336 -112 -512 -112
WIRE 448 -112 448 -128
WIRE 896 -112 896 -192
WIRE 944 -112 896 -112
WIRE 1040 -112 1024 -112
WIRE -176 -96 -176 -256
WIRE -32 -96 -32 -160
WIRE 1040 -96 1040 -112
WIRE 512 -80 128 -80
WIRE 896 -80 896 -112
WIRE 896 -80 800 -80
WIRE -496 -64 -512 -64
WIRE -336 -64 -336 -112
WIRE -288 -64 -336 -64
WIRE -976 -32 -976 -48
WIRE -896 -16 -912 -16
WIRE -800 -16 -832 -16
WIRE -464 -16 -464 -416
WIRE -464 -16 -512 -16
WIRE -240 -16 -240 -48
WIRE -240 -16 -304 -16
WIRE -176 -16 -176 -32
WIRE 512 -16 16 -16
WIRE 896 -16 800 -16
WIRE 1040 -16 1040 -32
WIRE 1040 -16 896 -16
WIRE -240 0 -240 -16
WIRE -800 32 -1008 32
WIRE -400 32 -512 32
WIRE -32 48 -32 0
WIRE 80 48 80 -64
WIRE 80 48 -32 48
WIRE 112 48 80 48
WIRE 224 48 192 48
WIRE 512 48 224 48
WIRE 816 48 800 48
WIRE -32 64 -32 48
WIRE 224 64 224 48
WIRE -1008 80 -1008 32
WIRE -992 80 -1008 80
WIRE -880 80 -912 80
WIRE -800 80 -816 80
WIRE -304 80 -304 -16
WIRE -304 80 -512 80
WIRE -400 96 -400 32
WIRE -240 96 -240 80
WIRE 512 112 480 112
WIRE 816 112 800 112
WIRE 224 144 224 128
WIRE -1008 176 -1008 80
WIRE -960 176 -1008 176
WIRE -816 176 -816 80
WIRE -816 176 -880 176
WIRE -496 176 -512 176
WIRE -400 176 -400 160
WIRE -400 176 -416 176
WIRE 512 176 -400 176
WIRE 816 176 800 176
WIRE -1120 240 -1120 -112
WIRE 64 240 -1120 240
WIRE 352 240 256 240
WIRE 384 240 352 240
WIRE 480 240 464 240
WIRE 512 240 480 240
WIRE 816 240 800 240
WIRE -1008 304 -1008 176
WIRE -48 304 -1008 304
WIRE 64 304 -48 304
WIRE -48 320 -48 304
WIRE 592 320 592 304
WIRE 720 320 720 304
WIRE 288 336 256 336
WIRE 352 336 352 240
WIRE 384 336 352 336
WIRE 480 336 480 240
WIRE 480 336 448 336
WIRE -48 416 -48 400
FLAG -496 -64 0
FLAG -240 96 0
FLAG -816 -208 0
FLAG -816 -256 0
FLAG -816 -304 0
FLAG -912 -16 0
FLAG -976 -32 0
FLAG -928 -304 0
FLAG 224 -128 0
FLAG 1120 -144 0
FLAG -32 144 0
FLAG -176 -16 0
FLAG 720 320 0
FLAG 592 320 0
FLAG -512 176 0
FLAG 448 -112 0
FLAG 480 112 0
FLAG 224 144 0
FLAG 816 112 0
FLAG 1040 -192 0
FLAG 288 336 0
FLAG -48 416 0
FLAG 816 48 0
FLAG 1120 -256 OUT
FLAG -928 -416 IN
SYMBOL nmos -224 -384 R0
SYMATTR InstName Q1
SYMATTR Value IRF7303
SYMBOL nmos -288 -144 R0
SYMATTR InstName Q2
SYMATTR Value IRF7303
SYMBOL voltage -928 -416 R0
SYMATTR InstName V1
SYMATTR Value 16
SYMBOL res -256 -16 R0
SYMATTR InstName R1
SYMATTR Value 25m
SYMBOL cap -832 -32 R90
SYMATTR InstName C1
SYMATTR Value .001
SYMBOL cap -816 64 R90
SYMATTR InstName C2
SYMATTR Value 3.3n
SYMBOL res -896 64 R90
SYMATTR InstName R2
SYMATTR Value 100
SYMBOL cap -992 -112 R0
SYMATTR InstName C3
SYMATTR Value 150p
SYMBOL res -1104 -96 R270
SYMATTR InstName R3
SYMATTR Value 52.3K
SYMBOL ind2 -96 -256 R0
SYMATTR InstName L1
SYMATTR Value 1m
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m Rpar=500
SYMBOL ind2 -16 -256 M0
SYMATTR InstName L2
SYMATTR Value 1m
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m Rpar=500
SYMBOL ind 96 -240 R270
SYMATTR InstName L3
SYMATTR Value 3
SYMATTR SpiceLine Rser=10m Rpar=1K
SYMBOL cap 208 -224 R0
SYMATTR InstName C4
SYMATTR Value 500
SYMATTR SpiceLine Rser=.025
SYMBOL cap -320 -368 R90
SYMATTR InstName C5
SYMATTR Value .5
SYMBOL schottky -400 -416 M0
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL PowerProducts\\LT3781 -656 -144 R0
SYMATTR InstName U1
SYMBOL schottky -224 -160 R180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -192 -32 M180
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL PowerProducts\\LTC1698 656 80 R0
SYMATTR InstName U2
SYMBOL res 704 -240 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap -416 160 M180
SYMATTR InstName C6
SYMATTR Value 100p
SYMBOL res -400 160 R90
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL voltage 448 -224 R0
SYMATTR InstName V2
SYMATTR Value 8
SYMBOL nmos 16 -96 M0
SYMATTR InstName Q3
SYMATTR Value IRF7303
SYMBOL res -48 48 R0
SYMATTR InstName R6
SYMATTR Value .25m
SYMBOL res 96 32 M90
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL cap 208 64 R0
SYMATTR InstName C7
SYMATTR Value 1000p
SYMBOL nmos 128 -160 M0
SYMATTR InstName Q4
SYMATTR Value IRF7303
SYMBOL res 784 -176 R270
SYMATTR InstName R8
SYMATTR Value 2K
SYMBOL res 1040 -128 R90
SYMATTR InstName R9
SYMATTR Value 300
SYMBOL cap 880 -80 R0
SYMATTR Value 1000p
SYMATTR InstName C8
SYMBOL cap 1024 -96 R0
SYMATTR InstName C9
SYMATTR Value .022
SYMBOL res 1024 -208 R90
SYMATTR InstName R10
SYMATTR Value 1K
SYMBOL res 480 224 R90
SYMATTR InstName R11
SYMATTR Value 1K
SYMBOL cap 448 320 R90
SYMATTR InstName C10
SYMATTR Value 4.7n
SYMBOL res -64 304 R0
SYMATTR InstName R12
SYMATTR Value 1K
SYMBOL optos\\MOC207 160 304 M0
SYMATTR InstName U3
SYMBOL res -864 160 R90
SYMATTR InstName R13
SYMATTR Value 3K
SYMBOL res 1104 -144 M180
SYMATTR InstName Rload
SYMATTR Value 2