* 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=25m
C5 N012 0 .01
R2 N013 N012 1K
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 LTC1709-7 ;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 .1
.tran 750u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1936 1120
WIRE -424 -560 -600 -560
WIRE 392 -560 -424 -560
WIRE 472 -560 392 -560
WIRE -600 -544 -600 -560
WIRE -104 -544 -264 -544
WIRE 24 -544 -104 -544
WIRE 120 -544 24 -544
WIRE 232 -544 120 -544
WIRE 24 -528 24 -544
WIRE 120 -528 120 -544
WIRE 232 -528 232 -544
WIRE 472 -496 472 -560
WIRE -424 -480 -424 -560
WIRE -264 -480 -264 -544
WIRE -104 -480 -104 -544
WIRE -600 -448 -600 -464
WIRE 24 -448 24 -464
WIRE -520 -416 -536 -416
WIRE 424 -416 -8 -416
WIRE -936 -352 -968 -352
WIRE -520 -352 -856 -352
WIRE 120 -352 120 -464
WIRE 120 -352 -8 -352
WIRE 472 -352 472 -400
WIRE 472 -352 312 -352
WIRE 552 -352 472 -352
WIRE 648 -352 552 -352
WIRE 744 -352 728 -352
WIRE 760 -352 744 -352
WIRE 856 -352 840 -352
WIRE 920 -352 856 -352
WIRE 968 -352 920 -352
WIRE 552 -336 552 -352
WIRE 968 -336 968 -352
WIRE 472 -304 472 -352
WIRE -744 -288 -760 -288
WIRE -600 -288 -664 -288
WIRE -520 -288 -536 -288
WIRE 120 -288 -8 -288
WIRE 312 -288 312 -352
WIRE 312 -288 120 -288
WIRE 552 -256 552 -272
WIRE 968 -240 968 -256
WIRE -680 -224 -760 -224
WIRE -520 -224 -616 -224
WIRE 424 -224 -8 -224
WIRE 472 -192 472 -208
WIRE -744 -160 -760 -160
WIRE -632 -160 -680 -160
WIRE -520 -160 -552 -160
WIRE 744 -160 744 -352
WIRE 744 -160 -8 -160
WIRE -520 -96 -536 -96
WIRE 856 -96 856 -352
WIRE 856 -96 -8 -96
WIRE 392 -48 392 -560
WIRE -520 -32 -536 -32
WIRE -536 32 -536 -32
WIRE -520 32 -536 32
WIRE 344 32 -8 32
WIRE -520 96 -536 96
WIRE 232 96 232 -464
WIRE 232 96 -8 96
WIRE 392 96 392 48
WIRE 392 96 328 96
WIRE 472 96 392 96
WIRE 584 96 472 96
WIRE 680 96 664 96
WIRE 696 96 680 96
WIRE 792 96 776 96
WIRE 920 96 920 -352
WIRE 920 96 792 96
WIRE 472 112 472 96
WIRE 920 128 920 96
WIRE 920 128 856 128
WIRE 392 144 392 96
WIRE 920 144 920 128
WIRE -536 160 -536 96
WIRE -520 160 -536 160
WIRE 232 160 -8 160
WIRE 328 160 328 96
WIRE 328 160 232 160
WIRE 472 192 472 176
WIRE -520 224 -536 224
WIRE 344 224 -8 224
WIRE 920 224 920 208
WIRE 920 224 888 224
WIRE 392 256 392 240
WIRE 920 256 920 224
WIRE -520 288 -536 288
WIRE 680 288 680 96
WIRE 680 288 -8 288
WIRE -520 352 -536 352
WIRE 792 352 792 96
WIRE 792 352 -8 352
WIRE -520 416 -536 416
WIRE 856 416 856 128
WIRE 856 416 -8 416
WIRE -520 480 -536 480
WIRE 888 480 888 224
WIRE 888 480 -8 480
WIRE -376 560 -376 544
WIRE -152 560 -152 544
FLAG 472 -192 0
FLAG 552 -256 0
FLAG 392 256 0
FLAG 472 192 0
FLAG -152 560 0
FLAG -376 560 0
FLAG 920 256 0
FLAG -760 -160 0
FLAG -760 -224 0
FLAG -600 -448 0
FLAG 968 -240 0
FLAG -968 -352 0
FLAG -760 -288 0
FLAG 24 -448 0
FLAG -536 -96 0
FLAG 968 -352 OUT
FLAG -600 -560 IN
SYMBOL NMOS 424 -496 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 104 -352 R0
SYMATTR InstName C1
SYMATTR Value .47
SYMBOL nmos 424 -304 R0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 104 -528 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 632 -336 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 744 -368 M90
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 536 -272 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 344 -48 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 216 96 R0
SYMATTR InstName C2
SYMATTR Value .47
SYMBOL nmos 344 144 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 568 112 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL schottky 456 176 M180
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 904 144 R0
SYMATTR Value2 x2
SYMATTR SpiceLine Rser=25m
SYMATTR InstName C3
SYMATTR Value 1000
SYMBOL cap -680 -176 R90
SYMATTR InstName C5
SYMATTR Value .01
SYMBOL res -536 -176 R90
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL cap -616 -240 R90
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 216 -528 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE -600 -560 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 680 80 M90
SYMATTR InstName R3
SYMATTR Value 2m
SYMBOL res -648 -304 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap -536 -304 R90
SYMATTR InstName C7
SYMATTR Value .01
SYMBOL polcap 8 -528 R0
SYMATTR InstName C8
SYMATTR Value 1
SYMBOL voltage -840 -352 R90
SYMATTR Value SINE(.5 .5 200K)
SYMATTR InstName V2
SYMBOL PowerProducts\\LTC1709-7 -264 32 R0
SYMATTR InstName U1
SYMBOL res 952 -352 R0
SYMATTR InstName Rload
SYMATTR Value .1