* SPICE netlist
C1 N021 0 10n
C2 N022 0 10n Rser=2.21K
V1 IN 0 12
R1 N001 N002 4m
R2 IN N011 383K
C3 N004 N001 .1
MQ1 IN N009 N001 N001 BSC067N06LS3
MQ2 N001 N007 0 0 BSC100N06LS3
L1 N002 N003 10 Rser=2m
R3 N006 OUT 50m
D1 N020 0 LXK2-PW14 N=5 M=2
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 100K
R7 N014 0 34.8K
C6 N012 0 4.7
R9 N012 N013 100K
C7 N015 0 0.47
R10 N019 0 150K
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 LT8391 ;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
R11 N015 N017 280K
R12 OUT N014 1Meg
R8 N015 N019 50K
R6 0 N016 51K
R13 N017 0 100K
.tran 10m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2080 1216
WIRE -304 -608 -576 -608
WIRE -176 -608 -304 -608
WIRE -160 -608 -176 -608
WIRE -48 -608 -80 -608
WIRE -32 -608 -48 -608
WIRE 80 -608 48 -608
WIRE 304 -608 80 -608
WIRE -304 -544 -304 -608
WIRE -176 -544 -176 -608
WIRE -48 -544 -48 -608
WIRE 80 -544 80 -608
WIRE -960 -480 -1040 -480
WIRE -848 -480 -960 -480
WIRE -576 -480 -576 -608
WIRE -576 -480 -752 -480
WIRE -496 -480 -576 -480
WIRE -416 -480 -432 -480
WIRE 208 -480 192 -480
WIRE 304 -480 304 -608
WIRE 304 -480 272 -480
WIRE 464 -480 304 -480
WIRE 656 -480 560 -480
WIRE 688 -480 656 -480
WIRE 768 -480 688 -480
WIRE 784 -480 768 -480
WIRE 880 -480 864 -480
WIRE 928 -480 880 -480
WIRE 1040 -480 928 -480
WIRE -1040 -464 -1040 -480
WIRE -576 -464 -576 -480
WIRE 304 -464 304 -480
WIRE 688 -464 688 -480
WIRE -416 -384 -528 -384
WIRE 256 -384 192 -384
WIRE 688 -384 688 -400
WIRE -1040 -368 -1040 -384
WIRE 304 -352 304 -368
WIRE -576 -336 -576 -368
WIRE -768 -304 -768 -432
WIRE -416 -304 -768 -304
WIRE 480 -304 480 -432
WIRE 480 -304 192 -304
WIRE -960 -240 -960 -480
WIRE -784 -240 -960 -240
WIRE -960 -224 -960 -240
WIRE -784 -224 -784 -240
WIRE -416 -224 -784 -224
WIRE 656 -224 656 -480
WIRE 656 -224 192 -224
WIRE -960 -128 -960 -144
WIRE -416 -128 -960 -128
WIRE 768 -128 768 -480
WIRE 768 -128 192 -128
WIRE -960 -112 -960 -128
WIRE -624 -32 -640 -32
WIRE -544 -32 -560 -32
WIRE -416 -32 -544 -32
WIRE 880 -32 880 -480
WIRE 880 -32 192 -32
WIRE 928 -32 928 -480
WIRE -960 -16 -960 -32
WIRE -544 64 -544 -32
WIRE -528 64 -544 64
WIRE -416 64 -448 64
WIRE 928 64 928 48
WIRE 928 64 192 64
WIRE 928 80 928 64
WIRE -720 160 -736 160
WIRE -624 160 -656 160
WIRE -512 160 -624 160
WIRE -464 160 -512 160
WIRE -416 160 -464 160
WIRE 208 160 192 160
WIRE 304 160 288 160
WIRE 928 176 928 160
WIRE -624 256 -624 160
WIRE -512 256 -512 160
WIRE -464 256 -464 160
WIRE -416 256 -464 256
WIRE 224 256 192 256
WIRE 1040 336 1040 -480
WIRE -624 352 -624 336
WIRE -416 352 -624 352
WIRE 992 352 192 352
WIRE -624 368 -624 352
WIRE -512 432 -512 336
WIRE -416 432 -512 432
WIRE 208 432 192 432
WIRE -512 448 -512 432
WIRE 1040 448 1040 432
WIRE -624 464 -624 448
WIRE -304 512 -304 496
WIRE -112 512 -112 496
WIRE 80 512 80 496
WIRE -512 544 -512 528
WIRE 1040 544 1040 512
WIRE -304 608 -304 576
WIRE -112 608 -112 576
WIRE 80 608 80 592
FLAG 208 432 0
FLAG -304 608 0
FLAG 80 608 0
FLAG -112 608 0
FLAG -1040 -368 0
FLAG -960 -16 0
FLAG 1040 544 0
FLAG 928 -480 OUT
FLAG 688 -384 0
FLAG -1040 -480 IN
FLAG -576 -336 0
FLAG 304 -352 0
FLAG 928 176 0
FLAG -640 -32 0
FLAG -736 160 0
FLAG -512 544 0
FLAG 224 256 0
FLAG 304 160 0
FLAG -624 464 0
SYMBOL cap -320 512 R0
SYMATTR InstName C1
SYMATTR Value 10n
SYMBOL cap -128 512 R0
SYMATTR Value 10n
SYMATTR SpiceLine Rser=2.21K
SYMATTR InstName C2
SYMBOL voltage -1040 -480 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL res -176 -592 R270
SYMATTR InstName R1
SYMATTR Value 4m
SYMBOL res -976 -240 R0
SYMATTR InstName R2
SYMATTR Value 383K
SYMBOL cap -432 -496 R90
SYMATTR InstName C3
SYMATTR Value .1
SYMBOL nmos -848 -432 R270
SYMATTR InstName Q1
SYMATTR Value BSC067N06LS3
SYMBOL nmos -528 -464 M0
SYMATTR InstName Q2
SYMATTR Value BSC100N06LS3
SYMBOL ind -48 -592 R270
SYMATTR InstName L1
SYMATTR Value 10
SYMATTR SpiceLine Rser=2m
SYMBOL res 768 -464 R270
SYMATTR InstName R3
SYMATTR Value 50m
SYMBOL LED 1024 448 R0
SYMATTR Value2 N=5 M=2
SYMATTR Value LXK2-PW14
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 672 -464 R0
SYMATTR Value2 x2
SYMATTR Value 10
SYMATTR InstName C4
SYMATTR SpiceLine Rser=4m
SYMBOL res -976 -128 R0
SYMATTR InstName R4
SYMATTR Value 165K
SYMBOL nmos 560 -432 M270
SYMATTR InstName Q3
SYMATTR Value BSC093N04LS
SYMBOL nmos 256 -464 R0
SYMATTR InstName Q4
SYMATTR Value BSC093N04LS
SYMBOL cap 272 -496 R90
SYMATTR InstName C5
SYMATTR Value .1
SYMBOL pmos 992 432 M180
SYMATTR InstName Q5
SYMATTR Value FDS4885C_P
SYMBOL res 64 496 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res 912 64 R0
SYMATTR InstName R7
SYMATTR Value 34.8K
SYMBOL cap -560 -48 R90
SYMATTR InstName C6
SYMATTR Value 4.7
SYMBOL res -544 80 R270
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL cap -656 144 R90
SYMATTR InstName C7
SYMATTR Value 0.47
SYMBOL res -528 432 R0
SYMATTR InstName R10
SYMATTR Value 150K
SYMBOL LT8391 -112 -16 R0
SYMATTR InstName U1
SYMBOL res -640 240 R0
SYMATTR InstName R11
SYMATTR Value 280K
SYMBOL res 912 -48 R0
SYMATTR InstName R12
SYMATTR Value 1Meg
SYMBOL res -528 240 R0
SYMATTR InstName R8
SYMATTR Value 50K
SYMBOL res 304 144 R90
SYMATTR InstName R6
SYMATTR Value 51K
SYMBOL res -640 352 R0
SYMATTR InstName R13
SYMATTR Value 100K