* SPICE netlist
XU1 N025 N028 N016 N018 N017 N019 N029 N030 N020 N022 0 N021 N023 N035 N027 N004 N003 N031 N026 N032 N033 Vcc NC_01 Vin N009 N007 N012 N015 Vcc N014 N011 N005 N008 N001 N001 N001 N002 N006 Vcc N024 LTC3853 ;pnba TK/SS2)TK/SS3)Sense1+)Sense1-)Sense2+)Sense2-)Sense3+)Sense3-)FB1)Ith1)GND)FB2)Ith2)FB3)Ith3)Pgood3)Pgood12)Boost3)TG3)SW3)BG3)IntVcc)ExtVcc)Vin)Boost2)TG2)SW2)BG2)DRVcc12)BG1)SW1)TG1)Boost1)Run3)Run2)Run1)Mode/PLLIN)Freq/PLLFLTR)Ilim)TK/SS1
V1 Vin 0 12
C1 Vcc 0 4.7
R1 N001 N003 100K
R2 N001 N004 100K
V2 N001 0 5
MQ1 Vin N005 N011 N011 Si4816BDY_1
C2 N008 N011 .1
D1 Vcc N008 CMDSH2-3
MQ2 N011 N014 0 0 Si4816BDY_1
L1 N011 N010 1.5
R3 N010 Vout1 8m
R4 N010 N016 10
R5 Vout1 N018 10
C3 N016 N018 1000p
C4 Vout1 0 220
C5 N022 0 1500p Rser=18K Cpar=220p
C6 N024 0 .001
R6 Vout1 N020 43.2K
R7 N020 0 20K
C7 Vout1 N020 10p
MQ3 Vin N007 N012 N012 Si4816BDY_1
C8 N009 N012 .1
D2 Vcc N009 CMDSH2-3
MQ4 N012 N015 0 0 Si4816BDY_1
L2 N012 N013 1.5
R8 N013 Vout2 8m
R9 N013 N017 10
R10 Vout2 N019 10
C9 N017 N019 1000p
C10 Vout2 0 220
C11 N023 0 1500p Rser=12K Cpar=220p
C12 N025 0 .001
R11 Vout2 N021 24.9K
R12 N021 0 20K
MQ5 Vin N026 N032 N032 Si4816BDY_1
C13 N031 N032 .1
D3 Vcc N031 CMDSH2-3
MQ6 N032 N033 0 0 Si4816BDY_1
L3 N032 N034 2.2
R13 N034 Vout3 8m
R14 N034 N029 10
R15 Vout3 N030 10
C14 N029 N030 1000p
C15 Vout3 0 220
C16 N027 0 1500p Rser=18K Cpar=220p
C17 N028 0 .001
R16 Vout3 N035 63.4K
R17 N035 0 20K
C18 Vout3 N035 10p
V3 N002 0 SINE(1 1 500K)
C19 0 N006 .002 Rser=10K
Rload1 Vout1 0 .5
Rload2 Vout2 0 .36
Rload3 Vout3 0 .66
.tran 750U startup

* LTspice schematic (.asc)
Version 4
SHEET 1 2368 1696
WIRE 736 -848 -832 -848
WIRE -224 -784 -320 -784
WIRE -128 -784 -224 -784
WIRE -32 -784 -128 -784
WIRE 64 -784 -32 -784
WIRE 112 -784 64 -784
WIRE -656 -768 -688 -768
WIRE -528 -768 -576 -768
WIRE 112 -768 112 -784
WIRE -320 -752 -320 -784
WIRE -32 -752 -32 -784
WIRE 256 -752 256 -768
WIRE 560 -704 560 -736
WIRE -928 -688 -1184 -688
WIRE -832 -688 -832 -848
WIRE -832 -688 -928 -688
WIRE -640 -688 -832 -688
WIRE -416 -688 -640 -688
WIRE 112 -672 112 -688
WIRE -928 -656 -928 -688
WIRE -640 -656 -640 -688
WIRE 256 -656 256 -688
WIRE 256 -656 160 -656
WIRE 368 -656 256 -656
WIRE 448 -656 368 -656
WIRE -416 -640 -416 -688
WIRE -320 -640 -320 -672
WIRE -224 -640 -224 -784
WIRE -128 -640 -128 -784
WIRE -32 -640 -32 -672
WIRE 64 -640 64 -784
WIRE 160 -640 160 -656
WIRE 256 -640 256 -656
WIRE 448 -640 448 -656
WIRE 736 -624 736 -848
WIRE -544 -576 -592 -576
WIRE -528 -576 -528 -768
WIRE -512 -576 -528 -576
WIRE 560 -576 560 -640
WIRE 560 -576 544 -576
WIRE -928 -544 -928 -576
WIRE 688 -544 576 -544
WIRE -592 -480 -592 -496
WIRE -544 -480 -544 -576
WIRE -512 -480 -544 -480
WIRE 576 -480 576 -544
WIRE 576 -480 544 -480
WIRE 688 -480 688 -496
WIRE -592 -384 -592 -416
WIRE -512 -384 -592 -384
WIRE 688 -384 688 -416
WIRE 688 -384 544 -384
WIRE -592 -368 -592 -384
WIRE 688 -368 688 -384
WIRE -992 -288 -1120 -288
WIRE -912 -288 -992 -288
WIRE -896 -288 -912 -288
WIRE -800 -288 -816 -288
WIRE -768 -288 -800 -288
WIRE -640 -288 -640 -560
WIRE -640 -288 -688 -288
WIRE -592 -288 -592 -304
WIRE -592 -288 -640 -288
WIRE -512 -288 -592 -288
WIRE 688 -288 688 -304
WIRE 688 -288 544 -288
WIRE 736 -288 736 -528
WIRE 736 -288 688 -288
WIRE 784 -288 736 -288
WIRE 912 -288 864 -288
WIRE 928 -288 912 -288
WIRE 1024 -288 1008 -288
WIRE 1088 -288 1024 -288
WIRE 1184 -288 1088 -288
WIRE -1120 -272 -1120 -288
WIRE -992 -272 -992 -288
WIRE -640 -272 -640 -288
WIRE 736 -272 736 -288
WIRE 1088 -272 1088 -288
WIRE 1184 -272 1184 -288
WIRE -512 -192 -592 -192
WIRE 688 -192 544 -192
WIRE -1120 -176 -1120 -192
WIRE -992 -176 -992 -208
WIRE 1088 -176 1088 -208
WIRE 1184 -176 1184 -192
WIRE -640 -160 -640 -176
WIRE 736 -160 736 -176
WIRE -800 -96 -800 -288
WIRE -704 -96 -800 -96
WIRE -592 -96 -624 -96
WIRE -512 -96 -592 -96
WIRE 592 -96 544 -96
WIRE 720 -96 592 -96
WIRE 912 -96 912 -288
WIRE 912 -96 800 -96
WIRE -592 -80 -592 -96
WIRE 592 -80 592 -96
WIRE -912 0 -912 -288
WIRE -800 0 -912 0
WIRE -704 0 -800 0
WIRE -592 0 -592 -16
WIRE -592 0 -624 0
WIRE -512 0 -592 0
WIRE 592 0 592 -16
WIRE 592 0 544 0
WIRE 720 0 592 0
WIRE 1024 0 1024 -288
WIRE 1024 0 800 0
WIRE -800 16 -800 0
WIRE -912 96 -912 80
WIRE -800 96 -800 80
WIRE -800 96 -912 96
WIRE -512 96 -800 96
WIRE 1024 96 1024 80
WIRE 1024 96 544 96
WIRE -912 112 -912 96
WIRE 1024 112 1024 96
WIRE -608 192 -624 192
WIRE -512 192 -544 192
WIRE 576 192 544 192
WIRE 656 192 640 192
WIRE -912 208 -912 192
WIRE 1024 208 1024 192
WIRE -608 288 -624 288
WIRE -512 288 -544 288
WIRE 576 288 544 288
WIRE 656 288 640 288
WIRE -416 384 -416 352
WIRE -416 384 -512 384
WIRE 256 384 256 352
WIRE 352 384 352 352
WIRE 448 384 448 352
WIRE -32 400 -32 352
WIRE -16 400 -32 400
WIRE 64 400 64 352
WIRE 64 400 48 400
WIRE -512 432 -512 384
WIRE -416 432 -432 432
WIRE -320 432 -320 352
WIRE -320 432 -352 432
WIRE -304 432 -320 432
WIRE -224 432 -224 352
WIRE -224 432 -240 432
WIRE -128 432 -128 352
WIRE -32 464 -32 400
WIRE 64 464 64 400
WIRE 256 464 256 448
WIRE 352 464 352 448
WIRE -1184 480 -1184 -688
WIRE -592 480 -1184 480
WIRE -224 480 -224 432
WIRE -224 480 -496 480
WIRE -208 480 -224 480
WIRE -96 480 -112 480
WIRE -224 528 -224 480
WIRE -224 624 -224 608
WIRE -32 624 -32 544
WIRE -32 624 -224 624
WIRE 64 624 64 544
WIRE 80 624 64 624
WIRE 160 624 160 352
WIRE 160 624 144 624
WIRE -224 640 -224 624
WIRE -224 736 -224 720
WIRE -224 736 -368 736
WIRE 64 736 64 624
WIRE 64 736 -224 736
WIRE 160 736 160 624
WIRE 160 736 144 736
WIRE 176 736 160 736
WIRE 272 736 256 736
WIRE -368 752 -368 736
WIRE -224 768 -224 736
WIRE -368 848 -368 832
WIRE -224 848 -224 832
FLAG -928 -544 0
FLAG -928 -688 Vin
FLAG 448 384 0
FLAG 256 -768 0
FLAG 112 -672 0
FLAG -640 -160 0
FLAG 368 -656 Vcc
FLAG -592 -496 Vcc
FLAG -992 -176 0
FLAG -1120 -288 Vout1
FLAG -624 192 0
FLAG -624 288 0
FLAG -912 208 0
FLAG 736 -160 0
FLAG 688 -496 Vcc
FLAG 1184 -176 0
FLAG 1088 -176 0
FLAG 1184 -288 Vout2
FLAG 656 192 0
FLAG 656 288 0
FLAG 1024 208 0
FLAG -96 480 0
FLAG -432 432 Vcc
FLAG -368 848 0
FLAG -224 848 0
FLAG -368 736 Vout3
FLAG 256 464 0
FLAG 352 464 0
FLAG 272 736 0
FLAG -688 -768 0
FLAG 560 -736 0
FLAG -1120 -176 0
SYMBOL PowerProducts\\LTC3853 16 -144 R0
SYMATTR InstName U1
SYMBOL voltage -928 -672 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 272 -688 R180
SYMATTR InstName C1
SYMATTR Value 4.7
SYMBOL res -336 -768 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res -48 -768 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL voltage 112 -784 R0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL nmos -592 -656 M0
SYMATTR Value Si4816BDY_1
SYMATTR InstName Q1
SYMBOL cap -608 -368 R0
SYMATTR InstName C2
SYMATTR Value .1
SYMBOL schottky -608 -480 R0
SYMATTR Value CMDSH2-3
SYMATTR InstName D1
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -592 -272 M0
SYMATTR InstName Q2
SYMATTR Value Si4816BDY_1
SYMBOL ind -672 -272 M270
SYMATTR InstName L1
SYMATTR Value 1.5
SYMBOL res -800 -304 R90
SYMATTR InstName R3
SYMATTR Value 8m
SYMBOL res -720 -80 R270
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL res -720 16 R270
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL cap -608 -80 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL cap -1008 -272 R0
SYMATTR InstName C4
SYMATTR Value 220
SYMBOL cap -544 176 R90
SYMATTR InstName C5
SYMATTR Value 1500p
SYMATTR SpiceLine Rser=18K Cpar=220p
SYMBOL cap -544 272 R90
SYMATTR InstName C6
SYMATTR Value .001
SYMBOL res -928 -16 R0
SYMATTR InstName R6
SYMATTR Value 43.2K
SYMBOL res -928 96 R0
SYMATTR InstName R7
SYMATTR Value 20K
SYMBOL cap -816 16 R0
SYMATTR InstName C7
SYMATTR Value 10p
SYMBOL nmos 688 -624 R0
SYMATTR Value Si4816BDY_1
SYMATTR InstName Q3
SYMBOL cap 704 -368 M0
SYMATTR InstName C8
SYMATTR Value .1
SYMBOL schottky 704 -480 M0
SYMATTR Value CMDSH2-3
SYMATTR InstName D2
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos 688 -272 R0
SYMATTR InstName Q4
SYMATTR Value Si4816BDY_1
SYMBOL ind 768 -272 R270
SYMATTR InstName L2
SYMATTR Value 1.5
SYMBOL res 912 -304 M90
SYMATTR InstName R8
SYMATTR Value 8m
SYMBOL res 816 -80 M270
SYMATTR InstName R9
SYMATTR Value 10
SYMBOL res 816 16 M270
SYMATTR InstName R10
SYMATTR Value 10
SYMBOL cap 576 -80 R0
SYMATTR InstName C9
SYMATTR Value 1000p
SYMBOL cap 1072 -272 R0
SYMATTR InstName C10
SYMATTR Value 220
SYMBOL cap 576 176 M90
SYMATTR InstName C11
SYMATTR Value 1500p
SYMATTR SpiceLine Rser=12K Cpar=220p
SYMBOL cap 576 272 M90
SYMATTR InstName C12
SYMATTR Value .001
SYMBOL res 1008 -16 R0
SYMATTR InstName R11
SYMATTR Value 24.9K
SYMBOL res 1008 96 R0
SYMATTR InstName R12
SYMATTR Value 20K
SYMBOL nmos -592 432 M90
SYMATTR InstName Q5
SYMATTR Value Si4816BDY_1
SYMBOL cap -304 448 R270
SYMATTR InstName C13
SYMATTR Value .1
SYMBOL schottky -416 448 R270
SYMATTR InstName D3
SYMATTR Value CMDSH2-3
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -208 432 M90
SYMATTR InstName Q6
SYMATTR Value Si4816BDY_1
SYMBOL ind -208 512 M0
SYMATTR InstName L3
SYMATTR Value 2.2
SYMBOL res -240 624 R0
SYMATTR InstName R13
SYMATTR Value 8m
SYMBOL res -48 560 M180
SYMATTR InstName R14
SYMATTR Value 10
SYMBOL res 48 560 M180
SYMATTR InstName R15
SYMATTR Value 10
SYMBOL cap -16 416 R270
SYMATTR InstName C14
SYMATTR Value 1000p
SYMBOL cap -240 768 R0
SYMATTR InstName C15
SYMATTR Value 220
SYMBOL cap 240 384 R0
SYMATTR InstName C16
SYMATTR Value 1500p
SYMATTR SpiceLine Rser=18K Cpar=220p
SYMBOL cap 336 384 R0
SYMATTR InstName C17
SYMATTR Value .001
SYMBOL res 48 752 R270
SYMATTR InstName R16
SYMATTR Value 63.4K
SYMBOL res 160 752 R270
SYMATTR InstName R17
SYMATTR Value 20K
SYMBOL cap 80 640 R270
SYMATTR InstName C18
SYMATTR Value 10p
SYMBOL voltage -560 -768 M270
SYMATTR InstName V3
SYMATTR Value SINE(1 1 500K)
SYMBOL cap 544 -704 R0
SYMATTR InstName C19
SYMATTR Value .002
SYMATTR SpiceLine Rser=10K
SYMBOL res -1136 -288 R0
SYMATTR InstName Rload1
SYMATTR Value .5
SYMBOL res 1168 -288 R0
SYMATTR InstName Rload2
SYMATTR Value .36
SYMBOL res -384 736 R0
SYMATTR InstName Rload3
SYMATTR Value .66