* SPICE netlist
MQ1 IN N002 N004 N004 STD30NF06L
L1 N004 OUT .68 Rser=1.5m
C1 OUT 0 660
R1 OUT N008 62.5K
R2 N008 0 20K
C2 N003 N004 .1
C3 N001 0 4.7
C4 N009 0 3300p Rser=1K Cpar=100p
C5 N005 0 .002
V1 IN 0 12
XU1 NC_01 N007 NC_02 N005 N009 N008 OUT N010 NC_03 0 N006 N001 IN N003 N002 N004 LTC3851 ;pnba Mode/PLLIN)Freq/PLLFLTR)Run)TK/SS)Ith)Vfb)Sense-)Sense+)Ilim)GND)BG)IntVcc)Vin)Boost)TG)SW
D1 N001 N003 CMDSH2-3
MQ2 N004 N006 0 0 STD30NF06L
C6 OUT N008 47p
D2 0 N004 MBRS340
R3 N004 N010 10K
C7 N010 OUT .22 Rpar=13K
C8 N007 0 .1 Rpar=80K
Rload OUT 0 .22
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1536 752
WIRE -80 -376 -640 -376
WIRE -640 -296 -640 -376
WIRE -560 -296 -640 -296
WIRE 32 -296 -112 -296
WIRE 240 -296 32 -296
WIRE -640 -280 -640 -296
WIRE 32 -280 32 -296
WIRE 240 -280 240 -296
WIRE -640 -200 -640 -216
WIRE -16 -200 -112 -200
WIRE 240 -184 240 -200
WIRE -80 -104 -80 -312
WIRE -80 -104 -112 -104
WIRE -48 -104 -80 -104
WIRE 32 -104 32 -184
WIRE 32 -104 16 -104
WIRE 32 -8 32 -104
WIRE 32 -8 -112 -8
WIRE 208 -8 32 -8
WIRE 336 -8 208 -8
WIRE 352 -8 336 -8
WIRE 448 -8 432 -8
WIRE 480 -8 448 -8
WIRE 576 -8 480 -8
WIRE 672 -8 576 -8
WIRE 768 -8 672 -8
WIRE 32 8 32 -8
WIRE 672 8 672 -8
WIRE 768 8 768 -8
WIRE 208 40 208 -8
WIRE 480 56 480 -8
WIRE 576 56 576 -8
WIRE -720 88 -768 88
WIRE -560 88 -656 88
WIRE -16 88 -112 88
WIRE 672 104 672 72
WIRE 768 104 768 88
WIRE 32 120 32 104
WIRE 208 120 208 104
WIRE -656 184 -768 184
WIRE -560 184 -592 184
WIRE 480 184 480 136
WIRE 480 184 -112 184
WIRE 576 184 576 120
WIRE 576 184 480 184
WIRE 480 200 480 184
WIRE -752 280 -768 280
WIRE -560 280 -688 280
WIRE -64 280 -112 280
WIRE 80 280 -64 280
WIRE 336 280 336 -8
WIRE 336 280 160 280
WIRE -64 296 -64 280
WIRE 480 296 480 280
WIRE -560 376 -592 376
WIRE -64 376 -64 360
WIRE -64 376 -112 376
WIRE 448 376 448 -8
WIRE 448 376 -64 376
FLAG -592 376 0
FLAG 32 120 0
FLAG 672 104 0
FLAG 768 104 0
FLAG 480 296 0
FLAG 768 -8 OUT
FLAG -640 -200 0
FLAG -768 280 0
FLAG -768 88 0
FLAG 240 -184 0
FLAG 208 120 0
FLAG 240 -296 IN
FLAG -768 184 0
SYMBOL nmos -16 -280 R0
SYMATTR InstName Q1
SYMATTR Value STD30NF06L
SYMBOL ind 336 8 R270
SYMATTR InstName L1
SYMATTR Value .68
SYMATTR SpiceLine Rser=1.5m
SYMBOL cap 656 8 R0
SYMATTR InstName C1
SYMATTR Value 660
SYMBOL res 464 40 R0
SYMATTR InstName R1
SYMATTR Value 62.5K
SYMBOL res 464 184 R0
SYMATTR InstName R2
SYMATTR Value 20K
SYMBOL cap -48 -88 R270
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL cap -656 -280 R0
SYMATTR InstName C3
SYMATTR Value 4.7
SYMBOL cap -688 264 R90
SYMATTR InstName C4
SYMATTR Value 3300p
SYMATTR SpiceLine Rser=1K Cpar=100p
SYMBOL cap -656 72 R90
SYMATTR InstName C5
SYMATTR Value .002
SYMBOL voltage 240 -296 R0
SYMATTR Value 12
SYMATTR InstName V1
SYMBOL PowerProducts\\LTC3851 -336 40 R0
SYMATTR InstName U1
SYMBOL schottky -96 -376 R0
SYMATTR Value CMDSH2-3
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -16 8 R0
SYMATTR InstName Q2
SYMATTR Value STD30NF06L
SYMBOL cap 560 56 R0
SYMATTR InstName C6
SYMATTR Value 47p
SYMBOL schottky 192 104 M180
SYMATTR InstName D2
SYMATTR Value MBRS340
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 176 264 R90
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL cap -80 296 R0
SYMATTR Value .22
SYMATTR SpiceLine Rpar=13K
SYMATTR InstName C7
SYMBOL cap -592 168 R90
SYMATTR InstName C8
SYMATTR Value .1
SYMATTR SpiceLine Rpar=80K
SYMBOL res 752 -8 R0
SYMATTR InstName Rload
SYMATTR Value .22