* SPICE netlist
MQ1 IN N004 N007 N007 IRF7811
C1 N006 N007 .47
MQ2 N007 N011 0 0 IRF7809A
D1 N001 N006 MBR0520L
L1 N007 N008 1
R1 N008 OUT .003
MQ3 IN N015 N018 N018 IRF7811
C2 N017 N018 .47
MQ4 N018 N022 0 0 IRF7809A
L2 N018 N019 1
R2 N020 0 16K
R3 N021 N020 16K
R4 OUT N016 3.3K
C3 N014 N013 1000p
R5 N013 0 5K
C4 N012 0 250p
D2 N001 N017 MBR0520L
V1 IN 0 6
R6 N019 OUT .003
C5 N001 0 1
XU1 N012 N008 OUT N020 N010 N009 N003 N014 0 N021 0 OUT OUT N019 N016 N015 N018 N017 N022 0 N001 N002 N011 IN N006 N007 N004 N005 LTC3729 ;pnba Run/SS)Sense1+)Sense1-)EAIN)PLLFLT)PLLIN)PHASEMD)Ith)SGND)DiffOut)OS-)OS+)Sense2-)Sense2+)Pgood)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1)CLKOUT
C7 OUT 0 1000 Rser=10m x2
D3 0 N007 MBRS130L
D4 0 N018 MBRS130L
Rload OUT 0 .2
.tran 2m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1840 1072
WIRE -552 -536 -808 -536
WIRE 296 -536 -552 -536
WIRE 376 -536 296 -536
WIRE -808 -520 -808 -536
WIRE -104 -520 -232 -520
WIRE 8 -520 -104 -520
WIRE 152 -520 8 -520
WIRE -104 -504 -104 -520
WIRE 8 -504 8 -520
WIRE 152 -504 152 -520
WIRE 376 -472 376 -536
WIRE -552 -456 -552 -536
WIRE -392 -456 -392 -488
WIRE -232 -456 -232 -520
WIRE -808 -424 -808 -440
WIRE -104 -424 -104 -440
WIRE -648 -392 -680 -392
WIRE 328 -392 -136 -392
WIRE -648 -328 -680 -328
WIRE 8 -328 8 -440
WIRE 8 -328 -136 -328
WIRE 376 -328 376 -376
WIRE 376 -328 232 -328
WIRE 456 -328 376 -328
WIRE 552 -328 456 -328
WIRE 680 -328 632 -328
WIRE 696 -328 680 -328
WIRE 792 -328 776 -328
WIRE 856 -328 792 -328
WIRE 456 -312 456 -328
WIRE 376 -280 376 -328
WIRE -648 -264 -680 -264
WIRE 8 -264 -136 -264
WIRE 232 -264 232 -328
WIRE 232 -264 8 -264
WIRE 456 -232 456 -248
WIRE -648 -200 -680 -200
WIRE 328 -200 -136 -200
WIRE 376 -168 376 -184
WIRE 856 -152 856 -328
WIRE 920 -152 856 -152
WIRE 680 -136 680 -328
WIRE 680 -136 -136 -136
WIRE 920 -136 920 -152
WIRE -744 -72 -776 -72
WIRE -648 -72 -680 -72
WIRE 792 -72 792 -328
WIRE 792 -72 -136 -72
WIRE 920 -40 920 -56
WIRE 296 -24 296 -536
WIRE -888 56 -920 56
WIRE -744 56 -808 56
WIRE -648 56 -680 56
WIRE 248 56 -136 56
WIRE -824 120 -904 120
WIRE -648 120 -744 120
WIRE 152 120 152 -440
WIRE 152 120 -136 120
WIRE 296 120 296 72
WIRE 296 120 232 120
WIRE 376 120 296 120
WIRE 504 120 376 120
WIRE 616 120 584 120
WIRE 632 120 616 120
WIRE 728 120 712 120
WIRE 760 120 728 120
WIRE 856 120 856 -152
WIRE 856 120 760 120
WIRE 376 136 376 120
WIRE 856 152 856 120
WIRE 856 152 792 152
WIRE 296 168 296 120
WIRE 856 168 856 152
WIRE -760 184 -856 184
WIRE -648 184 -680 184
WIRE 152 184 -136 184
WIRE 232 184 232 120
WIRE 232 184 152 184
WIRE 376 216 376 200
WIRE -856 248 -856 184
WIRE -648 248 -856 248
WIRE 248 248 -136 248
WIRE 856 248 856 232
WIRE 856 248 824 248
WIRE -856 264 -856 248
WIRE 856 264 856 248
WIRE 296 280 296 264
WIRE -648 312 -728 312
WIRE 616 312 616 120
WIRE 616 312 -136 312
WIRE -856 360 -856 344
WIRE -648 376 -696 376
WIRE 728 376 728 120
WIRE 728 376 -136 376
WIRE -504 456 -504 440
WIRE -280 456 -280 440
WIRE -696 504 -696 376
WIRE 792 504 792 152
WIRE 792 504 -696 504
WIRE -728 520 -728 312
WIRE 824 520 824 248
WIRE 824 520 -728 520
WIRE -904 536 -904 120
WIRE 760 536 760 120
WIRE 760 536 -904 536
FLAG 376 -168 0
FLAG 456 -232 0
FLAG 296 280 0
FLAG 376 216 0
FLAG -280 456 0
FLAG -504 456 0
FLAG 856 264 0
FLAG -856 360 0
FLAG -920 56 0
FLAG -776 -72 0
FLAG -808 -424 0
FLAG 920 -40 0
FLAG -104 -424 0
FLAG 920 -152 OUT
FLAG -808 -536 IN
SYMBOL NMOS 328 -472 R0
SYMATTR InstName Q1
SYMATTR Value IRF7811
SYMBOL polcap -8 -328 R0
SYMATTR Value .47
SYMATTR InstName C1
SYMBOL nmos 328 -280 R0
SYMATTR InstName Q2
SYMATTR Value IRF7809A
SYMBOL schottky -8 -504 R0
SYMATTR InstName D1
SYMATTR Value MBR0520L
SYMBOL ind 536 -312 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 680 -344 M90
SYMATTR InstName R1
SYMATTR Value .003
SYMBOL nmos 248 -24 R0
SYMATTR InstName Q3
SYMATTR Value IRF7811
SYMBOL polcap 136 120 R0
SYMATTR Value .47
SYMATTR InstName C2
SYMBOL nmos 248 168 R0
SYMATTR InstName Q4
SYMATTR Value IRF7809A
SYMBOL ind 488 136 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL res -872 248 R0
SYMATTR InstName R2
SYMATTR Value 16K
SYMBOL RES -664 168 R90
SYMATTR InstName R3
SYMATTR Value 16K
SYMBOL res -840 136 R270
SYMATTR InstName R4
SYMATTR Value 3.3K
SYMBOL cap -680 40 R90
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res -792 40 R90
SYMATTR InstName R5
SYMATTR Value 5K
SYMBOL cap -680 -88 R90
SYMATTR InstName C4
SYMATTR Value 250p
SYMBOL schottky 136 -504 R0
SYMATTR InstName D2
SYMATTR Value MBR0520L
SYMBOL VOLTAGE -808 -536 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 616 104 M90
SYMATTR InstName R6
SYMATTR Value .003
SYMBOL polcap -120 -504 R0
SYMATTR InstName C5
SYMATTR Value 1
SYMBOL POWERPRODUCTS\\LTC3729 -392 -8 R0
SYMATTR InstName U1
SYMBOL polcap 840 168 R0
SYMATTR SpiceLine2 x2
SYMATTR Value 1000
SYMATTR InstName C7
SYMATTR SpiceLine Rser=10m
SYMBOL schottky 440 -248 M180
SYMATTR InstName D3
SYMATTR Value MBRS130L
SYMBOL schottky 360 200 M180
SYMATTR InstName D4
SYMATTR Value MBRS130L
SYMBOL res 904 -152 R0
SYMATTR InstName Rload
SYMATTR Value .2