* SPICE netlist
M1 OUT N003 IN IN BSC028N06LS3
C1 OUT N004 1
L1 OUT N005 100 Rser=5
C2 OUT 0 4.7 Rser=10m
C3 OUT 0 1500 Rser=20m
D1 N001 0 UFZV18B
D2 N001 IN UFZV33B
V1 IN 0 SINE(12 3 50K 0.2)
Rload OUT 0 2.37
XU1 0 N002 N009 N006 N012 N013 OUT N008 N014 N010 N011 N007 N005 N004 OUT IN N003 LT8673 ;pnba GND)VSNS1)VSNS2)RB)VINMON)VMON)EN/UVLO)ENR)RFLT)OUTC1)OUTC2)_FAULT)AUXSW)AUX)DRN)SRC)GATE
R1 N002 N006 33.2k
R2 OUT N002 120k
R3 N009 N006 24.9k
R4 IN N009 120k
R5 N013 0 22.1k
R6 IN N012 200k
R7 N014 0 21.5k
V2 N008 0 3.3
R8 N008 N007 100k
R9 N008 N010 100k
R10 N008 N011 100k
.tran 202m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1904 608
WIRE -936 -304 -952 -304
WIRE -680 -304 -936 -304
WIRE -552 -304 -680 -304
WIRE -24 -304 -552 -304
WIRE 88 -304 -24 -304
WIRE 232 -304 184 -304
WIRE 360 -304 232 -304
WIRE 488 -304 360 -304
WIRE 632 -304 488 -304
WIRE 792 -304 632 -304
WIRE 920 -304 792 -304
WIRE 952 -304 920 -304
WIRE -952 -288 -952 -304
WIRE -680 -288 -680 -304
WIRE 360 -288 360 -304
WIRE 488 -288 488 -304
WIRE 632 -288 632 -304
WIRE 792 -288 792 -304
WIRE 952 -288 952 -304
WIRE 232 -208 232 -304
WIRE 232 -208 -120 -208
WIRE -952 -192 -952 -208
WIRE -680 -192 -680 -224
WIRE -152 -192 -328 -192
WIRE 632 -192 632 -224
WIRE 792 -192 792 -224
WIRE 952 -192 952 -208
WIRE -24 -176 -24 -304
WIRE 104 -176 104 -256
WIRE 232 -176 232 -208
WIRE 360 -176 360 -224
WIRE 488 -176 488 -208
WIRE -424 -128 -456 -128
WIRE -328 -128 -328 -192
WIRE -328 -128 -344 -128
WIRE -312 -128 -328 -128
WIRE -200 -128 -232 -128
WIRE -680 -112 -680 -128
WIRE -152 -112 -152 -192
WIRE -88 -112 -152 -112
WIRE 568 -96 536 -96
WIRE 760 -96 648 -96
WIRE -552 -32 -552 -304
WIRE -424 -32 -552 -32
WIRE -328 -32 -344 -32
WIRE -312 -32 -328 -32
WIRE -200 -32 -200 -128
WIRE -200 -32 -232 -32
WIRE -88 -32 -200 -32
WIRE 648 -32 536 -32
WIRE 760 -32 760 -96
WIRE 760 -32 728 -32
WIRE -328 48 -328 -32
WIRE -88 48 -328 48
WIRE 568 48 536 48
WIRE 760 48 760 -32
WIRE 760 48 648 48
WIRE -552 96 -552 -32
WIRE -440 96 -552 96
WIRE -88 96 -360 96
WIRE 760 128 760 48
WIRE 760 128 536 128
WIRE -88 144 -232 144
WIRE -232 160 -232 144
WIRE 760 176 760 128
WIRE -120 192 -120 -208
WIRE -88 192 -120 192
WIRE 584 192 536 192
WIRE 584 208 584 192
WIRE 232 240 232 224
WIRE -232 256 -232 240
WIRE 584 304 584 288
WIRE 760 304 760 256
FLAG 632 -192 0
FLAG 792 -192 0
FLAG 952 -192 0
FLAG 232 240 0
FLAG -680 -112 0
FLAG -936 -304 IN
FLAG 920 -304 OUT
FLAG -952 -192 0
FLAG -456 -128 OUT
FLAG -232 256 0
FLAG 584 304 0
FLAG 760 304 0
SYMBOL nmos 184 -256 M270
SYMATTR InstName M1
SYMATTR Value BSC028N06LS3
SYMBOL cap 344 -288 R0
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL ind 472 -304 R0
SYMATTR InstName L1
SYMATTR Value 100
SYMATTR SpiceLine Rser=5
SYMBOL cap 616 -288 R0
SYMATTR Value 4.7
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C2
SYMBOL cap 776 -288 R0
SYMATTR Value 1500
SYMATTR SpiceLine Rser=20m
SYMATTR InstName C3
SYMBOL zener -696 -192 R0
SYMATTR InstName D1
SYMATTR Value UFZV18B
SYMBOL zener -696 -224 M180
SYMATTR InstName D2
SYMATTR Value UFZV33B
SYMBOL voltage -952 -304 R0
SYMATTR InstName V1
SYMATTR Value SINE(12 3 50K 0.2)
SYMBOL res 936 -304 R0
SYMATTR InstName Rload
SYMATTR Value 2.37
SYMBOL LT8673 232 -48 R0
SYMATTR InstName U1
SYMBOL res -328 -144 M90
SYMATTR InstName R1
SYMATTR Value 33.2k
SYMBOL res -440 -144 M90
SYMATTR InstName R2
SYMATTR Value 120k
SYMBOL res -328 -48 M90
SYMATTR InstName R3
SYMATTR Value 24.9k
SYMBOL res -440 -48 M90
SYMATTR InstName R4
SYMATTR Value 120k
SYMBOL res -248 144 R0
SYMATTR InstName R5
SYMATTR Value 22.1k
SYMBOL res -456 80 M90
SYMATTR InstName R6
SYMATTR Value 200k
SYMBOL res 568 192 R0
SYMATTR InstName R7
SYMATTR Value 21.5k
SYMBOL voltage 760 160 R0
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL res 664 -112 R90
SYMATTR InstName R8
SYMATTR Value 100k
SYMBOL res 744 -48 R90
SYMATTR InstName R9
SYMATTR Value 100k
SYMBOL res 664 32 R90
SYMATTR InstName R10
SYMATTR Value 100k