* SPICE netlist
MQ1 IN N003 N005 N005 FDS6680A
MQ2 N005 N011 0 0 FDS6680A
C1 N006 N005 .1
C2 N001 0 4.7
D1 0 N005 MBRS140
L1 N005 N009 8 Rpar=2K
C3 N009 OUT1 1000p
R1 N013 0 20K
R2 N013 OUT1 105K
C4 OUT1 0 56 Rser=0.05
C5 N015 0 220p Rser=15K
C6 N017 0 .0001
V1 IN 0 18
MQ3 IN N004 N008 N008 FDS6680A
MQ4 N008 N012 0 0 FDS6680A
C7 N007 N008 .1
R4 N010 OUT2 .015
C8 N010 OUT2 1000p
R5 N014 0 20K
R6 N014 OUT2 280K
C9 OUT2 0 56 Rser=0.065
C11 N018 0 .0001
L2 N008 N010 15 Rpar=2K
R8 N009 OUT1 .015
R9 IN N020 10K
D2 0 N008 MBRS140
D3 N001 N006 MBRS140
D4 N001 N007 MBRS140
C12 0 N021 .01 Rser=10K
V2 N022 0 SINE(.8 .8 300K)
C10 0 N016 220p Rser=15K
Rload1 OUT1 0 1
Rload2 OUT2 0 2.4
XU1 N017 N009 OUT1 N013 N021 N022 N001 N015 0 N019 N016 N014 OUT2 N010 N018 N004 N008 N007 N012 0 N001 N002 N011 IN N006 N005 N003 N020 LTC3727A-1 ;pnba Run/SS1)Sense1+)Sense1-)Vosense1)PLLFLTR)PLLIN)FCB)Ith1)SGND)3.3Vout)Ith2)Vosense2)Sense2-)Sense2+)Run/SS2)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1)Pgood
.tran 800u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1840 1360
WIRE -744 -680 -904 -680
WIRE -472 -680 -744 -680
WIRE -72 -680 -472 -680
WIRE 520 -680 -72 -680
WIRE -744 -664 -744 -680
WIRE -264 -664 -328 -664
WIRE -184 -664 -264 -664
WIRE 72 -664 -184 -664
WIRE 344 -664 72 -664
WIRE -264 -648 -264 -664
WIRE -328 -600 -328 -664
WIRE 344 -600 344 -664
WIRE -472 -584 -472 -680
WIRE -72 -584 -72 -680
WIRE 72 -584 72 -664
WIRE 216 -584 216 -600
WIRE 520 -584 520 -680
WIRE -744 -568 -744 -584
WIRE -264 -568 -264 -584
WIRE -152 -504 -424 -504
WIRE 472 -504 296 -504
WIRE -904 -424 -904 -680
WIRE -472 -408 -472 -488
WIRE -408 -408 -472 -408
WIRE -328 -408 -328 -536
WIRE -328 -408 -344 -408
WIRE -152 -408 -328 -408
WIRE 344 -408 344 -536
WIRE 344 -408 296 -408
WIRE 408 -408 344 -408
WIRE 520 -408 520 -488
WIRE 520 -408 472 -408
WIRE -712 -312 -728 -312
WIRE -616 -312 -632 -312
WIRE -472 -312 -472 -408
WIRE -472 -312 -616 -312
WIRE -152 -312 -472 -312
WIRE 520 -312 520 -408
WIRE 520 -312 296 -312
WIRE 664 -312 520 -312
WIRE 696 -312 664 -312
WIRE 792 -312 776 -312
WIRE -472 -296 -472 -312
WIRE 520 -296 520 -312
WIRE -616 -264 -616 -312
WIRE 664 -264 664 -312
WIRE -152 -216 -424 -216
WIRE 472 -216 296 -216
WIRE 520 -184 520 -200
WIRE 664 -184 664 -200
WIRE -616 -168 -616 -200
WIRE -472 -168 -472 -200
WIRE -728 -120 -728 -312
WIRE -328 -120 -728 -120
WIRE -152 -120 -328 -120
WIRE 344 -120 296 -120
WIRE 792 -120 792 -312
WIRE 792 -120 344 -120
WIRE -328 -104 -328 -120
WIRE 344 -104 344 -120
WIRE -728 -24 -728 -40
WIRE -328 -24 -328 -40
WIRE -328 -24 -728 -24
WIRE -152 -24 -328 -24
WIRE 344 -24 344 -40
WIRE 344 -24 296 -24
WIRE 792 -24 792 -40
WIRE 792 -24 344 -24
WIRE -728 72 -728 -24
WIRE -728 72 -856 72
WIRE -664 72 -728 72
WIRE -504 72 -584 72
WIRE -152 72 -504 72
WIRE 584 72 296 72
WIRE 664 72 584 72
WIRE 792 72 792 -24
WIRE 792 72 744 72
WIRE 920 72 792 72
WIRE -856 88 -856 72
WIRE -728 88 -728 72
WIRE -504 88 -504 72
WIRE 584 88 584 72
WIRE 792 88 792 72
WIRE 920 88 920 72
WIRE -280 168 -344 168
WIRE -152 168 -216 168
WIRE 328 168 296 168
WIRE 440 168 392 168
WIRE -856 184 -856 168
WIRE -728 184 -728 152
WIRE -504 184 -504 168
WIRE 584 184 584 168
WIRE 792 184 792 152
WIRE 920 184 920 168
WIRE -360 264 -376 264
WIRE -152 264 -296 264
WIRE 424 264 296 264
WIRE 520 264 488 264
WIRE -184 360 -184 -664
WIRE -152 360 -184 360
WIRE 328 360 296 360
WIRE -904 472 -904 -344
WIRE -152 472 -904 472
WIRE 328 472 296 472
WIRE 440 472 392 472
WIRE -72 584 -72 552
WIRE 72 584 72 552
WIRE 216 584 216 552
WIRE 72 680 72 664
FLAG -72 584 0
FLAG 216 584 0
FLAG -264 -568 0
FLAG -472 -168 0
FLAG -616 -168 0
FLAG -376 264 0
FLAG -344 168 0
FLAG -728 184 0
FLAG -504 184 0
FLAG -856 72 OUT1
FLAG -744 -568 0
FLAG 520 -184 0
FLAG 664 -184 0
FLAG 520 264 0
FLAG 440 168 0
FLAG 792 184 0
FLAG 584 184 0
FLAG 920 72 OUT2
FLAG -856 184 0
FLAG 920 184 0
FLAG 440 472 0
FLAG 72 680 0
FLAG -744 -680 IN
SYMBOL NMOS -424 -584 M0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL nmos -424 -296 M0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL cap -344 -424 R90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL cap -280 -648 R0
SYMATTR Value 4.7
SYMATTR InstName C2
SYMBOL schottky -632 -200 M180
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMBOL ind -616 -296 M270
SYMATTR InstName L1
SYMATTR Value 8
SYMATTR SpiceLine Rpar=2K
SYMBOL cap -344 -104 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res -520 72 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res -568 56 R90
SYMATTR InstName R2
SYMATTR Value 105K
SYMBOL polcap -744 88 R0
SYMATTR SpiceLine Rser=0.05
SYMATTR InstName C4
SYMATTR Value 56
SYMBOL cap -216 152 R90
SYMATTR InstName C5
SYMATTR Value 220p
SYMATTR SpiceLine Rser=15K
SYMBOL cap -296 248 R90
SYMATTR InstName C6
SYMATTR Value .0001
SYMBOL VOLTAGE -744 -680 R0
SYMATTR InstName V1
SYMATTR Value 18
SYMBOL nmos 472 -584 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL nmos 472 -296 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL cap 408 -424 M90
SYMATTR InstName C7
SYMATTR Value .1
SYMBOL res 776 -136 R0
SYMATTR InstName R4
SYMATTR Value .015
SYMBOL cap 328 -104 R0
SYMATTR InstName C8
SYMATTR Value 1000p
SYMBOL res 568 72 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 648 56 M90
SYMATTR InstName R6
SYMATTR Value 280K
SYMBOL polcap 776 88 R0
SYMATTR SpiceLine Rser=0.065
SYMATTR InstName C9
SYMATTR Value 56
SYMBOL cap 424 280 R270
SYMATTR InstName C11
SYMATTR Value .0001
SYMBOL ind 680 -296 R270
SYMATTR InstName L2
SYMATTR Value 15
SYMATTR SpiceLine Rpar=2K
SYMBOL res -744 -136 R0
SYMATTR InstName R8
SYMATTR Value .015
SYMBOL RES -920 -440 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL schottky 648 -200 M180
SYMATTR InstName D2
SYMATTR Value MBRS140
SYMBOL schottky -344 -600 R0
SYMATTR InstName D3
SYMATTR Value MBRS140
SYMBOL schottky 328 -600 R0
SYMATTR InstName D4
SYMATTR Value MBRS140
SYMBOL cap 392 456 R90
SYMATTR InstName C12
SYMATTR Value .01
SYMATTR SpiceLine Rser=10K
SYMBOL voltage 72 568 R0
SYMATTR InstName V2
SYMATTR Value SINE(.8 .8 300K)
SYMBOL cap 392 152 R90
SYMATTR InstName C10
SYMATTR Value 220p
SYMATTR SpiceLine Rser=15K
SYMBOL RES -872 72 R0
SYMATTR InstName Rload1
SYMATTR Value 1
SYMBOL res 904 72 R0
SYMATTR InstName Rload2
SYMATTR Value 2.4
SYMBOL PowerProducts\\LTC3727A-1 72 -120 R0
SYMATTR InstName U1