* SPICE netlist
MQ1 IN N002 N004 N004 FDS6680A
MQ2 N004 N008 0 0 FDS6680A
C1 N004 N005 .1
D1 N001 N005 1N5817
C2 N001 0 4.7
L1 N004 OUT1 2.2 Rser=5m Rpar=2K
C3 N010 OUT1 .1
R1 N012 0 20K
R2 OUT1 N012 63.4K
C4 OUT1 0 147
C5 N014 0 220p Rser=15K
C6 N016 0 .0005
V1 IN 0 10
MQ3 IN N003 N007 N007 FDS6680A
MQ4 N007 N009 0 0 FDS6680A
C7 N007 N006 .1
D3 N001 N006 1N5817
C8 N011 OUT2 .1
R5 N013 0 20K
R6 OUT2 N013 43.2K
C9 OUT2 0 147
L2 N007 OUT2 2.2 Rser=5m Rpar=2K
R9 OUT1 N020 20K
C12 N021 0 .002 Rser=10K
Rload1 OUT1 0 .66
Rload2 OUT2 0 .5
C10 N015 0 220p Rser=15K
C11 N017 0 .0005
V3 N022 0 SINE(1 1 500K)
R3 N010 N004 2.2K
R4 N007 N011 2.2K
XU1 N016 N010 OUT1 N012 N021 N022 N019 N014 0 N018 N015 N013 OUT2 N011 N017 N003 N007 N006 N009 0 N001 0 N008 IN N005 N004 N002 N020 LTC3850-1 ;pnba Track/SS1)Sense1+)Sense1-)Vosense1)Freq/PLLFLTR)FCB/PLLIN)Run2)Ith1)SGND)Run1)Ith2)Vosense2)Sense2-)Sense2+)Track/SS2)TG2)SW2)Boost2)BG2)PGND)IntVcc)ExtVcc)BG1)Vin)Boost1)SW1)TG1)Pgood
.tran 450u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1536 1296
WIRE -400 -648 -512 -648
WIRE -48 -648 -400 -648
WIRE 512 -648 -48 -648
WIRE -512 -632 -512 -648
WIRE -192 -632 -240 -632
WIRE 96 -632 -192 -632
WIRE 368 -632 96 -632
WIRE -192 -616 -192 -632
WIRE 368 -600 368 -632
WIRE -400 -584 -400 -648
WIRE -48 -584 -48 -648
WIRE 96 -584 96 -632
WIRE 240 -584 240 -600
WIRE 512 -584 512 -648
WIRE -512 -536 -512 -552
WIRE -192 -536 -192 -552
WIRE -128 -504 -352 -504
WIRE 464 -504 320 -504
WIRE -240 -488 -240 -632
WIRE -400 -408 -400 -488
WIRE -352 -408 -400 -408
WIRE -240 -408 -240 -424
WIRE -240 -408 -288 -408
WIRE -128 -408 -240 -408
WIRE 368 -408 368 -536
WIRE 368 -408 320 -408
WIRE 400 -408 368 -408
WIRE 512 -408 512 -488
WIRE 512 -408 464 -408
WIRE -544 -312 -560 -312
WIRE -432 -312 -464 -312
WIRE -400 -312 -400 -408
WIRE -400 -312 -432 -312
WIRE -128 -312 -400 -312
WIRE 512 -312 512 -408
WIRE 512 -312 320 -312
WIRE 560 -312 512 -312
WIRE 576 -312 560 -312
WIRE 672 -312 656 -312
WIRE -400 -296 -400 -312
WIRE 512 -296 512 -312
WIRE -128 -216 -352 -216
WIRE 464 -216 320 -216
WIRE -400 -184 -400 -200
WIRE 512 -184 512 -200
WIRE -432 -120 -432 -312
WIRE -336 -120 -432 -120
WIRE -208 -120 -256 -120
WIRE -128 -120 -208 -120
WIRE 368 -120 320 -120
WIRE 432 -120 368 -120
WIRE 560 -120 560 -312
WIRE 560 -120 512 -120
WIRE -208 -104 -208 -120
WIRE 368 -104 368 -120
WIRE -560 -24 -560 -312
WIRE -208 -24 -208 -40
WIRE -208 -24 -560 -24
WIRE -128 -24 -208 -24
WIRE 368 -24 368 -40
WIRE 368 -24 320 -24
WIRE 672 -24 672 -312
WIRE 672 -24 368 -24
WIRE -608 72 -752 72
WIRE -560 72 -560 -24
WIRE -560 72 -608 72
WIRE -496 72 -560 72
WIRE -368 72 -416 72
WIRE -128 72 -368 72
WIRE 528 72 320 72
WIRE 560 72 528 72
WIRE 672 72 672 -24
WIRE 672 72 640 72
WIRE 768 72 672 72
WIRE -752 88 -752 72
WIRE -560 88 -560 72
WIRE 672 88 672 72
WIRE 768 88 768 72
WIRE -368 104 -368 72
WIRE 528 104 528 72
WIRE -224 168 -256 168
WIRE -128 168 -160 168
WIRE 352 168 320 168
WIRE 448 168 416 168
WIRE -752 184 -752 168
WIRE -560 184 -560 152
WIRE 672 184 672 152
WIRE 768 184 768 168
WIRE -368 200 -368 184
WIRE 528 200 528 184
WIRE -304 264 -320 264
WIRE -128 264 -240 264
WIRE 432 264 320 264
WIRE 512 264 496 264
WIRE -128 360 -144 360
WIRE 336 360 320 360
WIRE -608 456 -608 72
WIRE -224 456 -608 456
WIRE -128 456 -144 456
WIRE 352 456 320 456
WIRE 432 456 416 456
WIRE -48 552 -48 536
WIRE 96 552 96 536
WIRE 240 552 240 536
WIRE 96 648 96 632
FLAG 240 552 0
FLAG -192 -536 0
FLAG -400 -184 0
FLAG -320 264 0
FLAG -256 168 0
FLAG -560 184 0
FLAG -368 200 0
FLAG -752 72 OUT1
FLAG -512 -536 0
FLAG 512 -184 0
FLAG 672 184 0
FLAG 528 200 0
FLAG 768 72 OUT2
FLAG -752 184 0
FLAG 768 184 0
FLAG -48 552 0
FLAG 432 456 0
FLAG -512 -648 IN
FLAG 512 264 0
FLAG 448 168 0
FLAG 96 648 0
FLAG 240 -600 0
SYMBOL NMOS -352 -584 M0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL nmos -352 -296 M0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL cap -352 -424 M90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL schottky -256 -488 R0
SYMATTR Value 1N5817
SYMATTR InstName D1
SYMBOL cap -208 -616 R0
SYMATTR InstName C2
SYMATTR Value 4.7
SYMBOL ind -448 -296 M270
SYMATTR InstName L1
SYMATTR Value 2.2
SYMATTR SpiceLine Rser=5m Rpar=2K
SYMBOL cap -224 -104 R0
SYMATTR Value .1
SYMATTR InstName C3
SYMBOL res -384 88 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res -512 88 R270
SYMATTR InstName R2
SYMATTR Value 63.4K
SYMBOL cap -576 88 R0
SYMATTR InstName C4
SYMATTR Value 147
SYMBOL cap -160 152 R90
SYMATTR InstName C5
SYMATTR Value 220p
SYMATTR SpiceLine Rser=15K
SYMBOL cap -240 248 R90
SYMATTR InstName C6
SYMATTR Value .0005
SYMBOL VOLTAGE -512 -648 R0
SYMATTR InstName V1
SYMATTR Value 10
SYMBOL nmos 464 -584 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL nmos 464 -296 R0
SYMATTR Value FDS6680A
SYMATTR InstName Q4
SYMBOL cap 464 -424 R90
SYMATTR InstName C7
SYMATTR Value .1
SYMBOL schottky 352 -600 R0
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMBOL cap 352 -104 R0
SYMATTR InstName C8
SYMATTR Value .1
SYMBOL res 512 88 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 656 88 M270
SYMATTR InstName R6
SYMATTR Value 43.2K
SYMBOL cap 656 88 R0
SYMATTR InstName C9
SYMATTR Value 147
SYMBOL ind 560 -296 R270
SYMATTR InstName L2
SYMATTR Value 2.2
SYMATTR SpiceLine Rser=5m Rpar=2K
SYMBOL RES -240 472 R270
SYMATTR InstName R9
SYMATTR Value 20K
SYMBOL cap 352 472 R270
SYMATTR Value .002
SYMATTR SpiceLine Rser=10K
SYMATTR InstName C12
SYMBOL RES -768 72 R0
SYMATTR InstName Rload1
SYMATTR Value .66
SYMBOL res 752 72 R0
SYMATTR InstName Rload2
SYMATTR Value .5
SYMBOL cap 352 152 M90
SYMATTR InstName C10
SYMATTR Value 220p
SYMATTR SpiceLine Rser=15K
SYMBOL cap 432 248 M90
SYMATTR InstName C11
SYMATTR Value .0005
SYMBOL voltage 96 536 R0
SYMATTR InstName V3
SYMATTR Value SINE(1 1 500K)
SYMBOL res -240 -136 R90
SYMATTR InstName R3
SYMATTR Value 2.2K
SYMBOL res 528 -136 R90
SYMATTR InstName R4
SYMATTR Value 2.2K
SYMBOL PowerProducts\\LTC3850-2 96 -120 R0
SYMATTR InstName U1