* SPICE netlist
MQ1 IN N004 N006 N006 FDS6680A
C1 N005 N006 .47
MQ2 N006 N010 0 0 FDS6680A
D1 N001 N005 1N5818
L1 N006 N007 1
R1 N007 OUT 2m
D2 0 N006 1N5818
MQ3 IN N014 N016 N016 FDS6680A
C2 N015 N016 .47
MQ4 N016 N020 0 0 FDS6680A
L2 N016 N017 1
D3 0 N016 1N5818
C3 OUT 0 1000 x2 Rser=10m
R2 N018 0 16K
R3 N019 N018 16K
R4 IN N003 3.3K
XU1 N011 N007 OUT N018 N009 N008 MP_01 N013 0 N019 0 OUT OUT N017 N003 N014 N016 N015 N020 0 N001 N002 N010 IN N005 N006 N004 LTC1929-PG ;pnba Run/SS)Sense1+)Sense1-)EAIN)PLLFLT)PLLIN))Ith)SGND)DiffOut)OS-)OS+)Sense2-)Sense2+)Pgood)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1
C4 N013 0 100p
C5 N012 0 1000p
R5 N013 N012 10K
C6 N011 0 250p
D4 N001 N015 1N5818
V1 IN 0 6
R6 N017 OUT 2m
C7 N001 0 10
Rload OUT 0 .5
.tran 1m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1856 1056
WIRE -672 -528 -768 -528
WIRE -496 -528 -672 -528
WIRE 368 -528 -496 -528
WIRE 448 -528 368 -528
WIRE -768 -512 -768 -528
WIRE -32 -512 -176 -512
WIRE 64 -512 -32 -512
WIRE 208 -512 64 -512
WIRE -672 -496 -672 -528
WIRE -32 -496 -32 -512
WIRE 64 -496 64 -512
WIRE 208 -496 208 -512
WIRE 448 -448 448 -528
WIRE -496 -432 -496 -528
WIRE -336 -432 -336 -464
WIRE -176 -432 -176 -512
WIRE -768 -416 -768 -432
WIRE -32 -416 -32 -432
WIRE -672 -368 -672 -416
WIRE -592 -368 -672 -368
WIRE 400 -368 -80 -368
WIRE 64 -304 64 -432
WIRE 64 -304 -80 -304
WIRE 448 -304 448 -352
WIRE 448 -304 272 -304
WIRE 528 -304 448 -304
WIRE 624 -304 528 -304
WIRE 720 -304 704 -304
WIRE 736 -304 720 -304
WIRE 832 -304 816 -304
WIRE 880 -304 832 -304
WIRE 928 -304 880 -304
WIRE 528 -288 528 -304
WIRE 928 -288 928 -304
WIRE 448 -256 448 -304
WIRE -592 -240 -624 -240
WIRE 64 -240 -80 -240
WIRE 272 -240 272 -304
WIRE 272 -240 64 -240
WIRE 528 -208 528 -224
WIRE 928 -192 928 -208
WIRE -592 -176 -624 -176
WIRE 400 -176 -80 -176
WIRE 448 -144 448 -160
WIRE 720 -112 720 -304
WIRE 720 -112 -80 -112
WIRE -688 -48 -720 -48
WIRE -592 -48 -624 -48
WIRE 832 -48 832 -304
WIRE 832 -48 -80 -48
WIRE 368 0 368 -528
WIRE -864 80 -912 80
WIRE -736 80 -784 80
WIRE -592 80 -736 80
WIRE 320 80 -80 80
WIRE -912 96 -912 80
WIRE -736 96 -736 80
WIRE 208 144 208 -432
WIRE 208 144 -80 144
WIRE 368 144 368 96
WIRE 368 144 304 144
WIRE 448 144 368 144
WIRE 560 144 448 144
WIRE 656 144 640 144
WIRE 672 144 656 144
WIRE 768 144 752 144
WIRE 880 144 880 -304
WIRE 880 144 768 144
WIRE 448 160 448 144
WIRE -912 176 -912 160
WIRE -736 176 -736 160
WIRE 880 176 880 144
WIRE 880 176 816 176
WIRE 368 192 368 144
WIRE 880 192 880 176
WIRE -688 208 -752 208
WIRE -592 208 -608 208
WIRE 208 208 -80 208
WIRE 304 208 304 144
WIRE 304 208 208 208
WIRE 448 240 448 224
WIRE -752 272 -752 208
WIRE -592 272 -752 272
WIRE 320 272 -80 272
WIRE 880 272 880 256
WIRE 880 272 848 272
WIRE -752 288 -752 272
WIRE 880 288 880 272
WIRE 368 304 368 288
WIRE -592 336 -672 336
WIRE 656 336 656 144
WIRE 656 336 -80 336
WIRE -752 384 -752 368
WIRE -592 400 -640 400
WIRE 768 400 768 144
WIRE 768 400 -80 400
WIRE -448 480 -448 464
WIRE -224 480 -224 464
WIRE -640 512 -640 400
WIRE 816 512 816 176
WIRE 816 512 -640 512
WIRE -672 528 -672 336
WIRE 848 528 848 272
WIRE 848 528 -672 528
FLAG 448 -144 0
FLAG 528 -208 0
FLAG 368 304 0
FLAG 448 240 0
FLAG -224 480 0
FLAG -448 480 0
FLAG 880 288 0
FLAG -752 384 0
FLAG -912 176 0
FLAG -736 176 0
FLAG -720 -48 0
FLAG -768 -416 0
FLAG 928 -192 0
FLAG -32 -416 0
FLAG 928 -304 OUT
FLAG -768 -528 IN
SYMBOL NMOS 400 -448 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL polcap 48 -304 R0
SYMATTR Value .47
SYMATTR InstName C1
SYMBOL nmos 400 -256 R0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL schottky 48 -496 R0
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL ind 608 -288 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL RES 720 -320 M90
SYMATTR InstName R1
SYMATTR Value 2m
SYMBOL schottky 512 -224 M180
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 320 0 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL polcap 192 144 R0
SYMATTR Value .47
SYMATTR InstName C2
SYMBOL nmos 320 192 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL ind 544 160 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL schottky 432 224 M180
SYMATTR InstName D3
SYMATTR Value 1N5818
SYMBOL polcap 864 192 R0
SYMATTR Value2 x2
SYMATTR Value 1000
SYMATTR SpiceLine Rser=10m
SYMATTR InstName C3
SYMBOL res -768 272 R0
SYMATTR InstName R2
SYMATTR Value 16K
SYMBOL RES -592 192 R90
SYMATTR InstName R3
SYMATTR Value 16K
SYMBOL res -688 -512 R0
SYMATTR InstName R4
SYMATTR Value 3.3K
SYMBOL POWERPRODUCTS\\LTC1929-PG -336 16 R0
SYMATTR InstName U1
SYMBOL cap -752 96 R0
SYMATTR InstName C4
SYMATTR Value 100p
SYMBOL cap -928 96 R0
SYMATTR InstName C5
SYMATTR Value 1000p
SYMBOL res -768 64 R90
SYMATTR InstName R5
SYMATTR Value 10K
SYMBOL cap -624 -64 R90
SYMATTR InstName C6
SYMATTR Value 250p
SYMBOL schottky 192 -496 R0
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL VOLTAGE -768 -528 R0
SYMATTR InstName V1
SYMATTR Value 6
SYMBOL RES 656 128 M90
SYMATTR InstName R6
SYMATTR Value 2m
SYMBOL polcap -48 -496 R0
SYMATTR InstName C7
SYMATTR Value 10
SYMBOL res 912 -304 R0
SYMATTR InstName Rload
SYMATTR Value .5