* SPICE netlist
V1 IN 0 3.3
R1 OUT1 N009 1Meg
R2 N009 0 309K
C1 OUT1 0 47 Rser=10m
L1 N001 OUT2 4.7
R3 OUT2 N002 255K
R4 N002 0 200K
C2 OUT2 0 10 Rser=10m
L2 N005 N007 4.7
XU1 IN N006 N008 N003 IN IN IN IN IN N001 0 IN N004 N002 N010 0 N011 N009 OUT1 N007 0 N005 IN IN LTC3520 ;pnba SVin)Aout)Ain)Rt)PWM1)_SD1)_SD2)_SD3)PVin2)SW2)PGND2)PWM2)SS2)FB2)Vc1)SGND)SS1)FB1)Vout1)SW1B)PGND1)SW1A)PVin1)PVin3
C3 OUT2 N002 27p
C4 N004 0 .005
R5 N003 0 54.9K
C5 OUT1 N009 56p Rser=10K
C6 N011 0 .002
C7 N009 N010 470p Rser=15K
Q1 OUT3 N006 OUT2 0 2N4403
R6 OUT3 N008 100K
R7 N008 0 110K
C8 OUT3 N008 33p
C9 OUT3 0 4.7
Rload1 OUT1 0 3.3
Rload2 OUT2 0 3
Rload3 OUT3 0 7.5
.tran 1m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1264 1056
WIRE -120 -528 -216 -528
WIRE -24 -528 -120 -528
WIRE 72 -528 -24 -528
WIRE 168 -528 72 -528
WIRE 264 -528 168 -528
WIRE -216 -512 -216 -528
WIRE -24 -512 -24 -528
WIRE 72 -512 72 -528
WIRE 168 -512 168 -528
WIRE -120 -448 -120 -528
WIRE -104 -448 -120 -448
WIRE 264 -448 264 -528
WIRE 264 -448 248 -448
WIRE -216 -416 -216 -432
WIRE -504 -336 -616 -336
WIRE -440 -336 -504 -336
WIRE -344 -336 -440 -336
WIRE -264 -336 -344 -336
WIRE -216 -336 -264 -336
WIRE -104 -336 -136 -336
WIRE 264 -336 264 -448
WIRE 264 -336 248 -336
WIRE -616 -320 -616 -336
WIRE -344 -320 -344 -336
WIRE -264 -320 -264 -336
WIRE -504 -304 -504 -336
WIRE -616 -224 -616 -240
WIRE -504 -224 -504 -240
WIRE -344 -224 -344 -256
WIRE -264 -224 -264 -240
WIRE -264 -224 -344 -224
WIRE -104 -224 -264 -224
WIRE 264 -224 248 -224
WIRE 360 -224 344 -224
WIRE -344 -208 -344 -224
WIRE -440 -112 -440 -336
WIRE -344 -112 -344 -128
WIRE -200 -112 -216 -112
WIRE -104 -112 -136 -112
WIRE 296 -112 248 -112
WIRE 296 -96 296 -112
WIRE -216 -64 -376 -64
WIRE -440 0 -440 -16
WIRE -440 0 -568 0
WIRE -344 0 -440 0
WIRE -248 0 -344 0
WIRE -216 0 -216 -64
WIRE -104 0 -216 0
WIRE 296 0 296 -16
WIRE 296 0 248 0
WIRE -568 16 -568 0
WIRE -344 16 -344 0
WIRE -248 16 -248 0
WIRE -440 32 -440 0
WIRE -568 112 -568 96
WIRE -440 112 -440 96
WIRE -344 112 -344 80
WIRE -248 112 -248 96
WIRE -248 112 -344 112
WIRE -104 112 -248 112
WIRE 296 112 248 112
WIRE 456 112 296 112
WIRE 552 112 456 112
WIRE 632 112 552 112
WIRE -248 128 -248 112
WIRE 296 128 296 112
WIRE 456 128 456 112
WIRE 552 128 552 112
WIRE 632 128 632 112
WIRE -248 224 -248 208
WIRE -120 224 -120 -448
WIRE -104 224 -120 224
WIRE 296 224 296 192
WIRE 296 224 248 224
WIRE 456 224 456 208
WIRE 456 224 296 224
WIRE 552 224 552 192
WIRE 632 224 632 208
WIRE 456 240 456 224
WIRE 296 256 296 224
WIRE -120 336 -120 224
WIRE -104 336 -120 336
WIRE 296 336 296 320
WIRE 296 336 248 336
WIRE 456 336 456 320
WIRE -120 448 -120 336
WIRE -104 448 -120 448
WIRE 264 448 248 448
WIRE 344 448 328 448
WIRE -24 528 -24 512
WIRE 72 528 72 512
WIRE 168 528 168 512
FLAG -216 -416 0
FLAG 632 224 0
FLAG 456 336 0
FLAG 552 224 0
FLAG -344 -112 0
FLAG -504 -224 0
FLAG -616 -224 0
FLAG -24 528 0
FLAG 72 528 0
FLAG 168 528 0
FLAG -616 -336 OUT2
FLAG 632 112 OUT1
FLAG -216 -112 0
FLAG 360 -224 0
FLAG 344 448 0
FLAG -248 224 0
FLAG -568 112 0
FLAG -440 112 0
FLAG -568 0 OUT3
FLAG -216 -528 IN
SYMBOL voltage -216 -528 R0
SYMATTR Value 3.3
SYMATTR InstName V1
SYMBOL res 440 112 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 440 224 R0
SYMATTR InstName R2
SYMATTR Value 309K
SYMBOL cap 536 128 R0
SYMATTR InstName C1
SYMATTR Value 47
SYMATTR SpiceLine Rser=10m
SYMBOL ind -120 -320 M270
SYMATTR InstName L1
SYMATTR Value 4.7
SYMBOL res -280 -336 R0
SYMATTR InstName R3
SYMATTR Value 255K
SYMBOL res -360 -224 R0
SYMATTR InstName R4
SYMATTR Value 200K
SYMBOL cap -520 -304 R0
SYMATTR InstName C2
SYMATTR Value 10
SYMATTR SpiceLine Rser=10m
SYMBOL ind 280 -112 R0
SYMATTR InstName L2
SYMATTR Value 4.7
SYMBOL PowerProducts\\LTC3520 72 0 R0
SYMATTR InstName U1
SYMBOL cap -360 -320 R0
SYMATTR Value 27p
SYMATTR InstName C3
SYMBOL cap -136 -128 R90
SYMATTR InstName C4
SYMATTR Value .005
SYMBOL res 248 -208 R270
SYMATTR InstName R5
SYMATTR Value 54.9K
SYMBOL cap 280 128 R0
SYMATTR Value 56p
SYMATTR SpiceLine Rser=10K
SYMATTR InstName C5
SYMBOL cap 264 432 M90
SYMATTR InstName C6
SYMATTR Value .002
SYMBOL cap 280 256 R0
SYMATTR SpiceLine Rser=15K
SYMATTR Value 470p
SYMATTR InstName C7
SYMBOL pnp -376 -16 R180
SYMATTR InstName Q1
SYMATTR Value 2N4403
SYMBOL res -264 0 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL res -264 112 R0
SYMATTR InstName R7
SYMATTR Value 110K
SYMBOL cap -360 16 R0
SYMATTR InstName C8
SYMATTR Value 33p
SYMBOL cap -456 32 R0
SYMATTR InstName C9
SYMATTR Value 4.7
SYMBOL res 616 112 R0
SYMATTR InstName Rload1
SYMATTR Value 3.3
SYMBOL res -632 -336 R0
SYMATTR InstName Rload2
SYMATTR Value 3
SYMBOL res -584 0 R0
SYMATTR InstName Rload3
SYMATTR Value 7.5