* SPICE netlist
C1 N021 0 10n
C2 N022 0 3.3n Rser=4.7K
V1 IN 0 12
R1 N001 N002 6m
R2 IN N011 383K
C3 N004 N001 .1
MQ1 IN N009 N001 N001 BSC067N06LS3
MQ2 N001 N007 0 0 BSC100N06LS3
L1 N002 N003 2.2 Rser=2m
R3 N006 OUT 56m
C4 N006 0 10 x2 Rser=4m
R4 N011 0 165K
MQ3 N006 N010 N003 N003 BSC093N04LS
MQ4 N003 N008 0 0 BSC093N04LS
C5 N003 N005 .1
MQ5 N020 N018 OUT OUT FDS4885C_P
R5 N023 0 59k
R7 N014 0 48.7K
C6 N012 0 4.7
R9 N012 N013 100K
C7 N015 0 0.47
R10 N019 0 150K
R11 N015 N017 280K
R12 OUT N014 1Meg
R8 N015 N019 50K
R6 0 N016 51K
XU1 N007 N004 N001 N009 N001 N002 IN N012 N011 N016 N019 N015 N017 N006 OUT N015 N013 N021 N014 N022 N023 0 N018 N006 N010 N003 N005 N008 0 LT8391A ;pnba BG1)BST1)SW1)TG1)LSP)LSN)Vin)INTVcc)EN/UVLO)Rp)PWM)Vref)CTRL1)ISP)ISN)CTRL2)_Fault)SS)FB)Vc)RT)Sync/SPRD)PWMTG)Vout)TG2)SW2)BST2)BG2)GND
R13 N017 0 100K
D2 N020 0 LXK2-PW14 N=5 M=2
.tran 3m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2096 1216
WIRE -296 -608 -568 -608
WIRE -168 -608 -296 -608
WIRE -152 -608 -168 -608
WIRE -40 -608 -72 -608
WIRE -24 -608 -40 -608
WIRE 88 -608 56 -608
WIRE 312 -608 88 -608
WIRE -296 -544 -296 -608
WIRE -168 -544 -168 -608
WIRE -40 -544 -40 -608
WIRE 88 -544 88 -608
WIRE -952 -480 -1048 -480
WIRE -840 -480 -952 -480
WIRE -568 -480 -568 -608
WIRE -568 -480 -744 -480
WIRE -488 -480 -568 -480
WIRE -408 -480 -424 -480
WIRE 216 -480 200 -480
WIRE 312 -480 312 -608
WIRE 312 -480 280 -480
WIRE 472 -480 312 -480
WIRE 664 -480 568 -480
WIRE 696 -480 664 -480
WIRE 776 -480 696 -480
WIRE 792 -480 776 -480
WIRE 888 -480 872 -480
WIRE 936 -480 888 -480
WIRE 1048 -480 936 -480
WIRE -1048 -464 -1048 -480
WIRE -568 -464 -568 -480
WIRE 312 -464 312 -480
WIRE 696 -464 696 -480
WIRE -408 -384 -520 -384
WIRE 264 -384 200 -384
WIRE 696 -384 696 -400
WIRE -1048 -368 -1048 -384
WIRE 312 -352 312 -368
WIRE -568 -336 -568 -368
WIRE -760 -304 -760 -432
WIRE -408 -304 -760 -304
WIRE 488 -304 488 -432
WIRE 488 -304 200 -304
WIRE -952 -240 -952 -480
WIRE -776 -240 -952 -240
WIRE -952 -224 -952 -240
WIRE -776 -224 -776 -240
WIRE -408 -224 -776 -224
WIRE 664 -224 664 -480
WIRE 664 -224 200 -224
WIRE -952 -128 -952 -144
WIRE -408 -128 -952 -128
WIRE 776 -128 776 -480
WIRE 776 -128 200 -128
WIRE -952 -112 -952 -128
WIRE -616 -32 -632 -32
WIRE -536 -32 -552 -32
WIRE -408 -32 -536 -32
WIRE 888 -32 888 -480
WIRE 888 -32 200 -32
WIRE 936 -32 936 -480
WIRE -952 -16 -952 -32
WIRE -536 64 -536 -32
WIRE -520 64 -536 64
WIRE -408 64 -440 64
WIRE 936 64 936 48
WIRE 936 64 200 64
WIRE 936 80 936 64
WIRE -712 160 -728 160
WIRE -616 160 -648 160
WIRE -504 160 -616 160
WIRE -456 160 -504 160
WIRE -408 160 -456 160
WIRE 216 160 200 160
WIRE 312 160 296 160
WIRE 936 176 936 160
WIRE -616 256 -616 160
WIRE -504 256 -504 160
WIRE -456 256 -456 160
WIRE -408 256 -456 256
WIRE 232 256 200 256
WIRE 1048 336 1048 -480
WIRE -616 352 -616 336
WIRE -408 352 -616 352
WIRE 1000 352 200 352
WIRE -616 368 -616 352
WIRE -504 432 -504 336
WIRE -408 432 -504 432
WIRE 216 432 200 432
WIRE -504 448 -504 432
WIRE 1048 448 1048 432
WIRE -616 464 -616 448
WIRE -296 512 -296 496
WIRE -104 512 -104 496
WIRE 88 512 88 496
WIRE -504 544 -504 528
WIRE 1048 544 1048 512
WIRE -296 608 -296 576
WIRE -104 608 -104 576
WIRE 88 608 88 592
FLAG 216 432 0
FLAG -296 608 0
FLAG 88 608 0
FLAG -104 608 0
FLAG -1048 -368 0
FLAG -952 -16 0
FLAG 1048 544 0
FLAG 936 -480 OUT
FLAG 696 -384 0
FLAG -1048 -480 IN
FLAG -568 -336 0
FLAG 312 -352 0
FLAG 936 176 0
FLAG -632 -32 0
FLAG -728 160 0
FLAG -504 544 0
FLAG 232 256 0
FLAG 312 160 0
FLAG -616 464 0
SYMBOL cap -312 512 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL cap -120 512 R0
SYMATTR Value 3.3n
SYMATTR SpiceLine Rser=4.7K
SYMATTR InstName C2
SYMBOL voltage -1048 -480 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -168 -592 R270
SYMATTR InstName R1
SYMATTR Value 6m
SYMBOL res -968 -240 R0
SYMATTR InstName R2
SYMATTR Value 383K
SYMBOL cap -424 -496 R90
SYMATTR InstName C3
SYMATTR Value .1
SYMBOL nmos -840 -432 R270
SYMATTR InstName Q1
SYMATTR Value BSC067N06LS3
SYMBOL nmos -520 -464 M0
SYMATTR InstName Q2
SYMATTR Value BSC100N06LS3
SYMBOL ind -40 -592 R270
SYMATTR InstName L1
SYMATTR Value 2.2
SYMATTR SpiceLine Rser=2m
SYMBOL res 776 -464 R270
SYMATTR InstName R3
SYMATTR Value 56m
SYMBOL cap 680 -464 R0
SYMATTR Value2 x2
SYMATTR Value 10
SYMATTR InstName C4
SYMATTR SpiceLine Rser=4m
SYMBOL res -968 -128 R0
SYMATTR InstName R4
SYMATTR Value 165K
SYMBOL nmos 568 -432 M270
SYMATTR InstName Q3
SYMATTR Value BSC093N04LS
SYMBOL nmos 264 -464 R0
SYMATTR InstName Q4
SYMATTR Value BSC093N04LS
SYMBOL cap 280 -496 R90
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL pmos 1000 432 M180
SYMATTR InstName Q5
SYMATTR Value FDS4885C_P
SYMBOL res 72 496 R0
SYMATTR InstName R5
SYMATTR Value 59k
SYMBOL res 920 64 R0
SYMATTR InstName R7
SYMATTR Value 48.7K
SYMBOL cap -552 -48 R90
SYMATTR InstName C6
SYMATTR Value 4.7
SYMBOL res -536 80 R270
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL cap -648 144 R90
SYMATTR InstName C7
SYMATTR Value 0.47
SYMBOL res -520 432 R0
SYMATTR InstName R10
SYMATTR Value 150K
SYMBOL res -632 240 R0
SYMATTR InstName R11
SYMATTR Value 280K
SYMBOL res 920 -48 R0
SYMATTR InstName R12
SYMATTR Value 1Meg
SYMBOL res -520 240 R0
SYMATTR InstName R8
SYMATTR Value 50K
SYMBOL res 312 144 R90
SYMATTR InstName R6
SYMATTR Value 51K
SYMBOL PowerProducts\\LT8391A -104 -16 R0
SYMATTR InstName U1
SYMBOL res -632 352 R0
SYMATTR InstName R13
SYMATTR Value 100K
SYMBOL LED 1032 448 R0
SYMATTR Value2 N=5 M=2
SYMATTR Value LXK2-PW14
SYMATTR InstName D2
SYMATTR Description Diode
SYMATTR Type diode