* SPICE netlist
MQ1 IN N004 N007 N007 FDS6680A
C1 N006 N007 .47
MQ2 N007 N012 0 0 FDS6680A
D1 N001 N006 1N5818
L1 N007 N008 1
R1 N008 OUT 2m
D2 0 N007 1N5818
MQ3 IN N018 N021 N021 FDS6680A
C2 N020 N021 .47
MQ4 N021 N023 0 0 FDS6680A
L2 N021 N022 1
D3 0 N021 1N5818
C3 OUT 0 1000 x2 Rser=10m
C4 N014 0 100p
C5 N013 0 1000p
R2 N014 N013 10K
C6 N011 0 250p
D4 N001 N020 1N5818
V1 IN 0 6
R3 N022 OUT 2m
R4 N009 0 10K
C7 N010 N009 .01
C8 N001 0 1
R5 IN N003 10K
XU1 N011 N008 OUT N016 N010 N005 N017 N014 0 N019 0 OUT OUT N022 N016 N015 0 0 0 0 0 N001 N019 N018 N021 N020 N023 0 N001 N002 N012 IN N006 N007 N004 N003 LTC3719 ;pnba Run/SS)Sense1+)Sense1-)EAIN)PLLFLT)PLLIN)FCB)Ith)SGND)DiffOut)OS-)OS+)Sense2-)Sense2+)AttenOut)NO_CPU)VID0)VID1)VID2)VID3)VID4)Vbias)AttenIn)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1)PGOOD
R6 N015 N001 100K
Rload OUT 0 .5
.tran 1m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1792 1152
WIRE -112 -576 -896 -576
WIRE -672 -544 -816 -544
WIRE -496 -544 -672 -544
WIRE 320 -544 -496 -544
WIRE 400 -544 320 -544
WIRE -816 -528 -816 -544
WIRE -112 -528 -112 -576
WIRE -112 -528 -240 -528
WIRE 0 -528 -112 -528
WIRE 64 -528 0 -528
WIRE 176 -528 64 -528
WIRE -672 -512 -672 -544
WIRE 0 -512 0 -528
WIRE 64 -512 64 -528
WIRE 176 -512 176 -528
WIRE 400 -480 400 -544
WIRE -496 -464 -496 -544
WIRE -368 -464 -368 -496
WIRE -240 -464 -240 -528
WIRE -112 -464 -112 -528
WIRE -816 -432 -816 -448
WIRE 0 -432 0 -448
WIRE -672 -400 -672 -432
WIRE -576 -400 -672 -400
WIRE 352 -400 -32 -400
WIRE -576 -336 -608 -336
WIRE 64 -336 64 -448
WIRE 64 -336 -32 -336
WIRE 400 -336 400 -384
WIRE 400 -336 256 -336
WIRE 480 -336 400 -336
WIRE 576 -336 480 -336
WIRE 672 -336 656 -336
WIRE 688 -336 672 -336
WIRE 784 -336 768 -336
WIRE 848 -336 784 -336
WIRE 896 -336 848 -336
WIRE 480 -320 480 -336
WIRE 896 -320 896 -336
WIRE 400 -288 400 -336
WIRE -800 -272 -816 -272
WIRE -672 -272 -720 -272
WIRE -576 -272 -608 -272
WIRE 64 -272 -32 -272
WIRE 256 -272 256 -336
WIRE 256 -272 64 -272
WIRE 480 -240 480 -256
WIRE 896 -224 896 -240
WIRE -736 -208 -816 -208
WIRE -576 -208 -672 -208
WIRE 352 -208 -32 -208
WIRE 400 -176 400 -192
WIRE -816 -144 -848 -144
WIRE -704 -144 -736 -144
WIRE -576 -144 -704 -144
WIRE 672 -144 672 -336
WIRE 672 -144 -32 -144
WIRE -848 -128 -848 -144
WIRE -704 -128 -704 -144
WIRE -576 -80 -624 -80
WIRE 784 -80 784 -336
WIRE 784 -80 -32 -80
WIRE -848 -48 -848 -64
WIRE -704 -48 -704 -64
WIRE 320 -32 320 -544
WIRE -576 -16 -592 -16
WIRE 0 -16 -32 -16
WIRE -896 16 -896 -576
WIRE -816 16 -896 16
WIRE -624 16 -624 -80
WIRE -624 16 -736 16
WIRE -592 48 -592 -16
WIRE -576 48 -592 48
WIRE 272 48 -32 48
WIRE -576 112 -592 112
WIRE 176 112 176 -448
WIRE 176 112 -32 112
WIRE 320 112 320 64
WIRE 320 112 256 112
WIRE 400 112 320 112
WIRE 512 112 400 112
WIRE 608 112 592 112
WIRE 624 112 608 112
WIRE 720 112 704 112
WIRE 848 112 848 -336
WIRE 848 112 720 112
WIRE 400 128 400 112
WIRE 848 144 848 112
WIRE 848 144 784 144
WIRE 320 160 320 112
WIRE 848 160 848 144
WIRE -592 176 -592 112
WIRE -576 176 -592 176
WIRE 176 176 -32 176
WIRE 256 176 256 112
WIRE 256 176 176 176
WIRE 400 208 400 192
WIRE -576 240 -592 240
WIRE 272 240 -32 240
WIRE 848 240 848 224
WIRE 848 240 816 240
WIRE 320 272 320 256
WIRE 848 272 848 240
WIRE -576 304 -592 304
WIRE 608 304 608 112
WIRE 608 304 -32 304
WIRE -576 368 -592 368
WIRE 720 368 720 112
WIRE 720 368 -32 368
WIRE -576 432 -592 432
WIRE 784 432 784 144
WIRE 784 432 -32 432
WIRE -576 496 -592 496
WIRE 816 496 816 240
WIRE 816 496 -32 496
WIRE -416 576 -416 560
WIRE -192 576 -192 560
FLAG 400 -176 0
FLAG 480 -240 0
FLAG 320 272 0
FLAG 400 208 0
FLAG -192 576 0
FLAG -416 576 0
FLAG 848 272 0
FLAG -848 -48 0
FLAG -704 -48 0
FLAG -816 -208 0
FLAG -816 -432 0
FLAG 896 -224 0
FLAG -816 -272 0
FLAG 0 -432 0
FLAG -592 496 0
FLAG 896 -336 OUT
FLAG -592 240 0
FLAG -592 304 0
FLAG -592 368 0
FLAG -592 432 0
FLAG -816 -544 IN
SYMBOL NMOS 352 -480 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 48 -336 R0
SYMATTR Value .47
SYMATTR InstName C1
SYMBOL nmos 352 -288 R0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 48 -512 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 560 -320 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 672 -352 M90
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 464 -256 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 272 -32 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 160 112 R0
SYMATTR Value .47
SYMATTR InstName C2
SYMBOL nmos 272 160 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 496 128 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL schottky 384 192 M180
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 832 160 R0
SYMATTR Value2 x2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 1000
SYMATTR InstName C3
SYMBOL cap -720 -128 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap -864 -128 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res -720 -160 R90
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL cap -672 -224 R90
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 160 -512 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE -816 -544 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 608 96 M90
SYMATTR InstName R3
SYMATTR Value 2m
SYMBOL res -704 -288 R90
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL cap -608 -288 R90
SYMATTR InstName C7
SYMATTR Value .01
SYMBOL polcap -16 -512 R0
SYMATTR InstName C8
SYMATTR Value 1
SYMBOL RES -656 -528 M0
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL POWERPRODUCTS\\LTC3719 -304 48 R0
SYMATTR InstName U1
SYMBOL res -720 0 R90
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res 880 -336 R0
SYMATTR InstName Rload
SYMATTR Value .5