* SPICE netlist
MQ1 IN N003 N005 N005 FDS6680A
MQ2 N005 N011 0 0 FDS6680A
C1 N006 N005 .1
C2 N001 0 1
D2 0 N005 1N5817
L1 N005 N009 6.3 Rpar=10000
C3 N009 OUT1 1000p
R1 N013 0 20K
R2 N013 OUT1 105K
C4 OUT1 0 47 Rser=50m
C5 N016 N015 220p
C6 N019 0 .001
R3 N015 0 15K
V1 IN 0 7
MQ3 IN N004 N008 N008 FDS6680A
MQ4 N008 N012 0 0 FDS6680A
C7 N007 N008 .1
D4 0 N008 1N5817
R4 N010 OUT2 .01
C8 N010 OUT2 1000p
R5 N014 0 20K
R6 N014 OUT2 63.4K
C9 OUT2 0 47 Rser=50m
C10 N017 N018 220p
C11 N020 0 .001
R7 N018 0 15K
L2 N008 N010 6.3 Rpar=10000
R8 N009 OUT1 .01
R9 IN N022 10K
XU1 N019 N009 OUT1 N013 N023 0 N001 N016 0 N021 N017 N014 OUT2 N010 N020 N004 N008 N007 N012 0 N001 N002 N011 IN N006 N005 N003 N022 LTC3728 ;pnba Run/SS1)Sense1+)Sense1-)Vosense1)PLLFLTR)PLLIN)FCB)Ith1)SGND)3.3Vout)Ith2)Vosense2)Sense2-)Sense2+)Run/SS2)TG2)SW2)Boost2)BG2)PGND)INTVcc)EXTVcc)BG1)Vin)Boost1)SW1)TG1)Pgood
Rload2 OUT2 0 10
Rload1 OUT1 0 10
D1 N001 N006 1N5817
D3 N001 N007 1N5817
.tran 1.6m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2016 1216
WIRE -784 -608 -992 -608
WIRE -512 -608 -784 -608
WIRE -64 -608 -512 -608
WIRE 560 -608 -64 -608
WIRE -240 -592 -368 -592
WIRE -176 -592 -240 -592
WIRE 80 -592 -176 -592
WIRE 352 -592 80 -592
WIRE -784 -576 -784 -608
WIRE -240 -576 -240 -592
WIRE -368 -560 -368 -592
WIRE 352 -560 352 -592
WIRE -512 -544 -512 -608
WIRE -64 -544 -64 -608
WIRE 80 -544 80 -592
WIRE 224 -544 224 -560
WIRE 560 -544 560 -608
WIRE -240 -496 -240 -512
WIRE -784 -464 -784 -496
WIRE -144 -464 -464 -464
WIRE 512 -464 304 -464
WIRE -992 -384 -992 -608
WIRE -512 -368 -512 -448
WIRE -464 -368 -512 -368
WIRE -368 -368 -368 -496
WIRE -368 -368 -400 -368
WIRE -144 -368 -368 -368
WIRE 352 -368 352 -496
WIRE 352 -368 304 -368
WIRE 448 -368 352 -368
WIRE 560 -368 560 -448
WIRE 560 -368 512 -368
WIRE -784 -272 -816 -272
WIRE -672 -272 -704 -272
WIRE -512 -272 -512 -368
WIRE -512 -272 -672 -272
WIRE -144 -272 -512 -272
WIRE 560 -272 560 -368
WIRE 560 -272 304 -272
WIRE 720 -272 560 -272
WIRE 784 -272 720 -272
WIRE 912 -272 864 -272
WIRE -512 -256 -512 -272
WIRE 560 -256 560 -272
WIRE 720 -240 720 -272
WIRE -672 -224 -672 -272
WIRE -144 -176 -464 -176
WIRE 512 -176 304 -176
WIRE 720 -160 720 -176
WIRE -672 -144 -672 -160
WIRE -512 -144 -512 -160
WIRE 560 -144 560 -160
WIRE -816 -80 -816 -272
WIRE -384 -80 -816 -80
WIRE -144 -80 -384 -80
WIRE 416 -80 304 -80
WIRE 912 -80 912 -272
WIRE 912 -80 416 -80
WIRE -384 -64 -384 -80
WIRE 416 -64 416 -80
WIRE -816 16 -816 0
WIRE -384 16 -384 0
WIRE -384 16 -816 16
WIRE -144 16 -384 16
WIRE 416 16 416 0
WIRE 416 16 304 16
WIRE 912 16 912 0
WIRE 912 16 416 16
WIRE -816 112 -816 16
WIRE -816 112 -944 112
WIRE -752 112 -816 112
WIRE -592 112 -672 112
WIRE -144 112 -592 112
WIRE 672 112 304 112
WIRE 752 112 672 112
WIRE 912 112 912 16
WIRE 912 112 832 112
WIRE 1008 112 912 112
WIRE -944 128 -944 112
WIRE -816 128 -816 112
WIRE 912 128 912 112
WIRE 1008 128 1008 112
WIRE -592 144 -592 112
WIRE 672 144 672 112
WIRE -368 208 -384 208
WIRE -272 208 -288 208
WIRE -144 208 -208 208
WIRE 336 208 304 208
WIRE 416 208 400 208
WIRE 512 208 496 208
WIRE -944 224 -944 208
WIRE -816 224 -816 192
WIRE 912 224 912 192
WIRE 1008 224 1008 208
WIRE 672 240 672 224
WIRE -592 272 -592 224
WIRE -320 304 -384 304
WIRE -144 304 -256 304
WIRE 384 304 304 304
WIRE 512 304 448 304
WIRE -176 400 -176 -592
WIRE -144 400 -176 400
WIRE 320 400 304 400
WIRE -992 512 -992 -304
WIRE -144 512 -992 512
WIRE 320 512 304 512
WIRE -64 608 -64 592
WIRE 80 608 80 592
WIRE 224 608 224 592
FLAG 80 608 0
FLAG 224 608 0
FLAG -240 -496 0
FLAG -512 -144 0
FLAG -672 -144 0
FLAG -384 304 0
FLAG -384 208 0
FLAG -816 224 0
FLAG -592 272 0
FLAG -944 112 OUT1
FLAG -784 -464 0
FLAG 560 -144 0
FLAG 720 -160 0
FLAG 512 304 0
FLAG 512 208 0
FLAG 912 224 0
FLAG 672 240 0
FLAG 1008 112 OUT2
FLAG -944 224 0
FLAG 1008 224 0
FLAG -64 608 0
FLAG -784 -608 IN
SYMBOL NMOS -464 -544 M0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL nmos -464 -256 M0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL cap -400 -384 R90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL cap -256 -576 R0
SYMATTR InstName C2
SYMATTR Value 1
SYMBOL schottky -688 -160 M180
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMBOL ind -688 -256 M270
SYMATTR InstName L1
SYMATTR Value 6.3
SYMATTR SpiceLine Rpar=10000
SYMBOL cap -400 -64 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res -608 128 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res -656 96 R90
SYMATTR InstName R2
SYMATTR Value 105K
SYMBOL cap -832 128 R0
SYMATTR SpiceLine Rser=50m
SYMATTR InstName C4
SYMATTR Value 47
SYMBOL cap -208 192 R90
SYMATTR InstName C5
SYMATTR Value 220p
SYMBOL cap -256 288 R90
SYMATTR InstName C6
SYMATTR Value .001
SYMBOL res -272 192 R90
SYMATTR InstName R3
SYMATTR Value 15K
SYMBOL VOLTAGE -784 -592 R0
SYMATTR InstName V1
SYMATTR Value 7
SYMBOL nmos 512 -544 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL nmos 512 -256 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL cap 448 -384 M90
SYMATTR InstName C7
SYMATTR Value .1
SYMBOL schottky 704 -176 M180
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMBOL res 896 -96 R0
SYMATTR InstName R4
SYMATTR Value .01
SYMBOL cap 400 -64 R0
SYMATTR InstName C8
SYMATTR Value 1000p
SYMBOL res 656 128 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 736 96 M90
SYMATTR InstName R6
SYMATTR Value 63.4K
SYMBOL cap 896 128 R0
SYMATTR SpiceLine Rser=50m
SYMATTR InstName C9
SYMATTR Value 47
SYMBOL cap 336 224 R270
SYMATTR InstName C10
SYMATTR Value 220p
SYMBOL cap 384 320 R270
SYMATTR InstName C11
SYMATTR Value .001
SYMBOL res 400 224 R270
SYMATTR InstName R7
SYMATTR Value 15K
SYMBOL ind 768 -256 R270
SYMATTR InstName L2
SYMATTR Value 6.3
SYMATTR SpiceLine Rpar=10000
SYMBOL res -832 -96 R0
SYMATTR InstName R8
SYMATTR Value .01
SYMBOL RES -1008 -400 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL PowerProducts\\LTC3728L 80 -80 R0
SYMATTR InstName U1
SYMBOL res 992 112 R0
SYMATTR InstName Rload2
SYMATTR Value 10
SYMBOL RES -960 112 R0
SYMATTR InstName Rload1
SYMATTR Value 10
SYMBOL schottky -384 -560 R0
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMBOL schottky 336 -560 R0
SYMATTR InstName D3
SYMATTR Value 1N5817