* SPICE netlist
MQ1 IN N002 N004 N004 FDS6680A
MQ2 N004 N010 0 0 FDS6680A
C1 N005 N004 .1
D1 N001 N005 1N5817
C2 N001 0 1
D2 0 N004 1N5817
L1 N004 N008 6.3 Rpar=2K
C3 N008 OUT1 1000p
R1 N012 0 20K
R2 N012 OUT1 105K
C4 OUT1 0 47 Rser=50m
C5 N015 N014 220p
C6 N018 0 .002
R3 N014 0 15K
V1 IN 0 7
MQ3 IN N003 N007 N007 FDS6680A
MQ4 N007 N011 0 0 FDS6680A
C7 N006 N007 .1
D3 N001 N006 1N5817
D4 0 N007 1N5817
R4 N009 OUT2 .01
C8 N009 OUT2 1000p
R5 N013 0 20K
R6 N013 OUT2 63.4K
C9 OUT2 0 47 Rser=50m
C10 N016 N017 220p
C11 N019 0 .002
R7 N017 0 15K
L2 N007 N009 6.3 Rpar=2K
R8 N008 OUT1 .01
R9 IN N021 10K
XU1 N018 N008 OUT1 N012 N022 0 N001 N015 0 N020 N016 N013 OUT2 N009 N019 N003 N007 N006 N011 0 N001 NC_01 N010 IN N005 N004 N002 N021 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 0 100
Rload1 OUT1 0 100
.tran 3m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1888 1248
WIRE -752 -624 -928 -624
WIRE -480 -624 -752 -624
WIRE -112 -624 -480 -624
WIRE 512 -624 -112 -624
WIRE -752 -608 -752 -624
WIRE -224 -608 -336 -608
WIRE 32 -608 -224 -608
WIRE 288 -608 32 -608
WIRE 400 -608 288 -608
WIRE 400 -592 400 -608
WIRE -336 -544 -336 -608
WIRE 288 -544 288 -608
WIRE -480 -528 -480 -624
WIRE -112 -528 -112 -624
WIRE 32 -528 32 -608
WIRE 512 -528 512 -624
WIRE -752 -512 -752 -528
WIRE 400 -512 400 -528
WIRE -192 -448 -432 -448
WIRE 464 -448 256 -448
WIRE -928 -368 -928 -624
WIRE -480 -352 -480 -432
WIRE -432 -352 -480 -352
WIRE -336 -352 -336 -480
WIRE -336 -352 -368 -352
WIRE -192 -352 -336 -352
WIRE 288 -352 288 -480
WIRE 288 -352 256 -352
WIRE 400 -352 288 -352
WIRE 512 -352 512 -432
WIRE 512 -352 464 -352
WIRE -720 -256 -752 -256
WIRE -592 -256 -640 -256
WIRE -480 -256 -480 -352
WIRE -480 -256 -592 -256
WIRE -192 -256 -480 -256
WIRE 512 -256 512 -352
WIRE 512 -256 256 -256
WIRE 656 -256 512 -256
WIRE 688 -256 656 -256
WIRE 816 -256 768 -256
WIRE -480 -240 -480 -256
WIRE 512 -240 512 -256
WIRE -592 -208 -592 -256
WIRE 656 -208 656 -256
WIRE -192 -160 -432 -160
WIRE 464 -160 256 -160
WIRE -592 -128 -592 -144
WIRE -480 -128 -480 -144
WIRE 512 -112 512 -144
WIRE 656 -112 656 -144
WIRE -752 -64 -752 -256
WIRE -416 -64 -752 -64
WIRE -192 -64 -416 -64
WIRE 368 -64 256 -64
WIRE 816 -64 816 -256
WIRE 816 -64 368 -64
WIRE -416 -48 -416 -64
WIRE 368 -48 368 -64
WIRE -752 32 -752 16
WIRE -416 32 -416 16
WIRE -416 32 -752 32
WIRE -192 32 -416 32
WIRE 368 32 368 16
WIRE 368 32 256 32
WIRE 816 32 816 16
WIRE 816 32 368 32
WIRE -752 128 -752 32
WIRE -752 128 -880 128
WIRE -688 128 -752 128
WIRE -576 128 -608 128
WIRE -192 128 -576 128
WIRE 608 128 256 128
WIRE 672 128 608 128
WIRE 816 128 816 32
WIRE 816 128 752 128
WIRE 944 128 816 128
WIRE -880 144 -880 128
WIRE -752 144 -752 128
WIRE -576 144 -576 128
WIRE 608 144 608 128
WIRE 816 144 816 128
WIRE 944 144 944 128
WIRE -400 224 -416 224
WIRE -304 224 -320 224
WIRE -192 224 -240 224
WIRE 272 224 256 224
WIRE 368 224 336 224
WIRE 464 224 448 224
WIRE -880 240 -880 224
WIRE -752 240 -752 208
WIRE -576 240 -576 224
WIRE 608 240 608 224
WIRE 816 240 816 208
WIRE 944 240 944 224
WIRE -336 320 -432 320
WIRE -192 320 -272 320
WIRE 320 320 256 320
WIRE 416 320 384 320
WIRE -224 416 -224 -608
WIRE -192 416 -224 416
WIRE 288 416 256 416
WIRE -928 528 -928 -288
WIRE -192 528 -928 528
WIRE 288 528 256 528
WIRE -112 624 -112 608
WIRE 32 624 32 608
WIRE 176 624 176 608
FLAG 32 624 0
FLAG 176 624 0
FLAG 400 -512 0
FLAG -480 -128 0
FLAG -592 -128 0
FLAG -432 320 0
FLAG -416 224 0
FLAG -752 240 0
FLAG -576 240 0
FLAG -880 128 OUT1
FLAG -752 -512 0
FLAG 512 -112 0
FLAG 656 -112 0
FLAG 416 320 0
FLAG 464 224 0
FLAG 816 240 0
FLAG 608 240 0
FLAG 944 128 OUT2
FLAG -880 240 0
FLAG 944 240 0
FLAG -112 624 0
FLAG -752 -624 IN
SYMBOL NMOS -432 -528 M0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL nmos -432 -240 M0
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL cap -368 -368 R90
SYMATTR InstName C1
SYMATTR Value .1
SYMBOL schottky -352 -544 R0
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMBOL cap 384 -592 R0
SYMATTR InstName C2
SYMATTR Value 1
SYMBOL schottky -608 -144 M180
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMBOL ind -624 -240 M270
SYMATTR InstName L1
SYMATTR Value 6.3
SYMATTR SpiceLine Rpar=2K
SYMBOL cap -432 -48 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res -592 128 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res -592 112 R90
SYMATTR InstName R2
SYMATTR Value 105K
SYMBOL cap -768 144 R0
SYMATTR InstName C4
SYMATTR Value 47
SYMATTR SpiceLine Rser=50m
SYMBOL cap -240 208 R90
SYMATTR InstName C5
SYMATTR Value 220p
SYMBOL cap -272 304 R90
SYMATTR InstName C6
SYMATTR Value .002
SYMBOL res -304 208 R90
SYMATTR InstName R3
SYMATTR Value 15K
SYMBOL VOLTAGE -752 -624 R0
SYMATTR InstName V1
SYMATTR Value 7
SYMBOL nmos 464 -528 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL nmos 464 -240 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL cap 400 -368 M90
SYMATTR InstName C7
SYMATTR Value .1
SYMBOL schottky 272 -544 R0
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMBOL schottky 640 -144 M180
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMBOL res 800 -80 R0
SYMATTR InstName R4
SYMATTR Value .01
SYMBOL cap 352 -48 R0
SYMATTR InstName C8
SYMATTR Value 1000p
SYMBOL res 592 128 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 656 112 M90
SYMATTR InstName R6
SYMATTR Value 63.4K
SYMBOL cap 800 144 R0
SYMATTR InstName C9
SYMATTR Value 47
SYMATTR SpiceLine Rser=50m
SYMBOL cap 272 240 R270
SYMATTR InstName C10
SYMATTR Value 220p
SYMBOL cap 320 336 R270
SYMATTR InstName C11
SYMATTR Value .002
SYMBOL res 352 240 R270
SYMATTR InstName R7
SYMATTR Value 15K
SYMBOL ind 672 -240 R270
SYMATTR InstName L2
SYMATTR Value 6.3
SYMATTR SpiceLine Rpar=2K
SYMBOL res -768 -80 R0
SYMATTR InstName R8
SYMATTR Value .01
SYMBOL RES -944 -384 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL POWERPRODUCTS\\LTC3728 32 -64 R0
SYMATTR InstName U1
SYMBOL res 928 128 R0
SYMATTR InstName Rload2
SYMATTR Value 100
SYMBOL RES -896 128 R0
SYMATTR InstName Rload1
SYMATTR Value 100