* SPICE netlist
MQ1 IN N003 N006 N006 FDS6680A
C1 N005 N006 .47
MQ2 N006 N011 0 0 FDS6680A
D1 N001 N005 1N5818
L1 N006 N007 1
R1 N007 OUT 2m
D2 0 N006 1N5818
MQ3 IN N015 N018 N018 FDS6680A
C2 N017 N018 .47
MQ4 N018 N021 0 0 FDS6680A
L2 N018 N019 1
D3 0 N018 1N5818
C3 OUT 0 1000 x2 Rser=10m
C5 N013 N012 1000p
R2 N012 0 10K
C6 N010 0 250p
D4 N001 N017 1N5818
V1 IN 0 6
R3 N019 OUT 2m
R4 N008 0 10K
C7 N009 N008 .01
C8 N001 0 1
V2 N004 0 SINE(.5 .5 200K)
XU1 N010 N007 OUT N014 N009 N004 MP_01 N013 0 N016 0 OUT OUT N019 N014 N016 N020 N022 N023 N024 N025 N001 0 N015 N018 N017 N021 0 N001 N002 N011 IN N005 N006 N003 LTC1709-8 ;pnba Run/SS)Sense1+)Sense1-)EAIN)PLLFLT)PLLIN))Ith)SGND)DiffOut)OS-)OS+)Sense2-)Sense2+)AttenOut)AttenIn)VID0)VID1)VID2)VID3)VID4)Vbias)Pgood)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1
Rload OUT 0 .5
.tran 1m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1904 1136
WIRE -440 -568 -632 -568
WIRE 376 -568 -440 -568
WIRE 456 -568 376 -568
WIRE -632 -552 -632 -568
WIRE -120 -552 -280 -552
WIRE 8 -552 -120 -552
WIRE 104 -552 8 -552
WIRE 216 -552 104 -552
WIRE 8 -536 8 -552
WIRE 104 -536 104 -552
WIRE 216 -536 216 -552
WIRE 456 -504 456 -568
WIRE -440 -488 -440 -568
WIRE -280 -488 -280 -552
WIRE -120 -488 -120 -552
WIRE -632 -456 -632 -472
WIRE 8 -456 8 -472
WIRE -536 -424 -552 -424
WIRE 408 -424 -24 -424
WIRE -920 -360 -952 -360
WIRE -536 -360 -840 -360
WIRE 104 -360 104 -472
WIRE 104 -360 -24 -360
WIRE 456 -360 456 -408
WIRE 456 -360 296 -360
WIRE 536 -360 456 -360
WIRE 632 -360 536 -360
WIRE 728 -360 712 -360
WIRE 744 -360 728 -360
WIRE 840 -360 824 -360
WIRE 904 -360 840 -360
WIRE 952 -360 904 -360
WIRE 536 -344 536 -360
WIRE 952 -344 952 -360
WIRE 456 -312 456 -360
WIRE -744 -296 -760 -296
WIRE -616 -296 -664 -296
WIRE -536 -296 -552 -296
WIRE 104 -296 -24 -296
WIRE 296 -296 296 -360
WIRE 296 -296 104 -296
WIRE 536 -264 536 -280
WIRE 952 -248 952 -264
WIRE -680 -232 -760 -232
WIRE -536 -232 -616 -232
WIRE 408 -232 -24 -232
WIRE 456 -200 456 -216
WIRE -744 -168 -760 -168
WIRE -616 -168 -664 -168
WIRE -536 -168 -552 -168
WIRE 728 -168 728 -360
WIRE 728 -168 -24 -168
WIRE -536 -104 -552 -104
WIRE 840 -104 840 -360
WIRE 840 -104 -24 -104
WIRE 376 -56 376 -568
WIRE -536 -40 -552 -40
WIRE -552 24 -552 -40
WIRE -536 24 -552 24
WIRE 328 24 -24 24
WIRE -536 88 -552 88
WIRE 216 88 216 -472
WIRE 216 88 -24 88
WIRE 376 88 376 40
WIRE 376 88 312 88
WIRE 456 88 376 88
WIRE 568 88 456 88
WIRE 664 88 648 88
WIRE 680 88 664 88
WIRE 776 88 760 88
WIRE 904 88 904 -360
WIRE 904 88 776 88
WIRE 456 104 456 88
WIRE 904 120 904 88
WIRE 904 120 840 120
WIRE 376 136 376 88
WIRE 904 136 904 120
WIRE -552 152 -552 88
WIRE -536 152 -552 152
WIRE 216 152 -24 152
WIRE 312 152 312 88
WIRE 312 152 216 152
WIRE 456 184 456 168
WIRE -536 216 -552 216
WIRE 328 216 -24 216
WIRE 904 216 904 200
WIRE 904 216 872 216
WIRE 376 248 376 232
WIRE 904 248 904 216
WIRE -536 280 -552 280
WIRE 664 280 664 88
WIRE 664 280 -24 280
WIRE -536 344 -552 344
WIRE 776 344 776 88
WIRE 776 344 -24 344
WIRE -536 408 -552 408
WIRE 840 408 840 120
WIRE 840 408 -24 408
WIRE -536 472 -552 472
WIRE 872 472 872 216
WIRE 872 472 -24 472
WIRE -392 568 -392 536
WIRE -168 568 -168 536
FLAG 456 -200 0
FLAG 536 -264 0
FLAG 376 248 0
FLAG 456 184 0
FLAG -168 568 0
FLAG -392 568 0
FLAG 904 248 0
FLAG -760 -168 0
FLAG -760 -232 0
FLAG -632 -456 0
FLAG 952 -248 0
FLAG -952 -360 0
FLAG -760 -296 0
FLAG 8 -456 0
FLAG -552 -104 0
FLAG 952 -360 OUT
FLAG -632 -568 IN
SYMBOL NMOS 408 -504 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 88 -360 R0
SYMATTR InstName C1
SYMATTR Value .47
SYMBOL nmos 408 -312 R0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 88 -536 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 616 -344 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 728 -376 M90
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 520 -280 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 328 -56 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 200 88 R0
SYMATTR InstName C2
SYMATTR Value .47
SYMBOL nmos 328 136 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 552 104 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL schottky 440 168 M180
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 888 136 R0
SYMATTR Value2 x2
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C3
SYMATTR Value 1000
SYMBOL cap -552 -184 R90
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res -648 -184 R90
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL cap -616 -248 R90
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 200 -536 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE -632 -568 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 664 72 M90
SYMATTR InstName R3
SYMATTR Value 2m
SYMBOL res -648 -312 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap -552 -312 R90
SYMATTR InstName C7
SYMATTR Value .01
SYMBOL polcap -8 -536 R0
SYMATTR InstName C8
SYMATTR Value 1
SYMBOL voltage -824 -360 R90
SYMATTR Value SINE(.5 .5 200K)
SYMATTR InstName V2
SYMBOL PowerProducts\\LTC1709-8 -280 24 R0
SYMATTR InstName U1
SYMBOL res 936 -360 R0
SYMATTR InstName Rload
SYMATTR Value .5