* SPICE netlist
V1 IN 0 3
R1 OUT1 N005 1Meg
R2 N005 0 221K
C2 OUT1 0 22
L1 N002 OUT2 4.7
R3 OUT2 N004 137K
R4 N004 0 68.1K
C3 OUT2 0 10
L2 N001 N003 4.7
Rload2 OUT2 0 3
Rload1 OUT1 0 4
XU1 IN NC_01 NC_02 NC_03 IN 0 IN N005 IN IN IN 0 MP_04 N003 N001 OUT1 N006 0 MP_05 N002 0 IN N007 N004 LTC3521 ;pnba _SHDN2)Pgood3)Pgood2)Pgood1)Vin)GND)PWM)FB1)_SHDN3)_SHDN1)PVin1)PGND1B))SW1B)SW1A)Vout1)SW3)PGND2))SW2)PGND1A)PVin2)FB3)FB2
L3 N006 OUT3 4.7
R5 OUT3 N007 100K
R6 N007 0 100K
C1 OUT3 0 10
Rload3 OUT3 0 2
.tran 750u startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1088 880
WIRE -208 -440 -336 -440
WIRE -112 -440 -208 -440
WIRE -16 -440 -112 -440
WIRE 80 -440 -16 -440
WIRE 176 -440 80 -440
WIRE -336 -424 -336 -440
WIRE -112 -408 -112 -440
WIRE -16 -408 -16 -440
WIRE 80 -408 80 -440
WIRE -336 -328 -336 -344
WIRE -208 -248 -208 -440
WIRE -192 -248 -208 -248
WIRE 176 -248 176 -440
WIRE 176 -248 160 -248
WIRE -192 -152 -304 -152
WIRE 192 -152 160 -152
WIRE 288 -152 272 -152
WIRE 400 -152 288 -152
WIRE 480 -152 400 -152
WIRE -304 -136 -304 -152
WIRE 288 -136 288 -152
WIRE 400 -136 400 -152
WIRE 480 -136 480 -152
WIRE -192 -56 -304 -56
WIRE 288 -56 160 -56
WIRE 288 -40 288 -56
WIRE 400 -40 400 -72
WIRE 480 -40 480 -56
WIRE -400 40 -528 40
WIRE -304 40 -400 40
WIRE -192 40 -304 40
WIRE -528 56 -528 40
WIRE -400 56 -400 40
WIRE -304 56 -304 40
WIRE 288 56 288 40
WIRE -192 136 -304 136
WIRE 176 136 176 -248
WIRE 176 136 160 136
WIRE -528 152 -528 136
WIRE -400 152 -400 120
WIRE -304 152 -304 136
WIRE -208 232 -208 -248
WIRE -192 232 -208 232
WIRE 176 232 160 232
WIRE 288 232 256 232
WIRE 416 232 288 232
WIRE 544 232 416 232
WIRE -304 248 -304 232
WIRE 288 248 288 232
WIRE 416 248 416 232
WIRE 544 248 544 232
WIRE -192 328 -208 328
WIRE 288 328 160 328
WIRE 288 344 288 328
WIRE 416 344 416 312
WIRE 544 344 544 328
WIRE -128 408 -128 392
WIRE -16 408 -16 392
WIRE 96 408 96 392
WIRE 288 440 288 424
FLAG -336 -328 0
FLAG -528 152 0
FLAG -304 248 0
FLAG -400 152 0
FLAG 288 56 0
FLAG 400 -40 0
FLAG 480 -40 0
FLAG -128 408 0
FLAG -16 408 0
FLAG 96 408 0
FLAG 480 -152 OUT2
FLAG -528 40 OUT1
FLAG -208 328 0
FLAG 288 440 0
FLAG 416 344 0
FLAG 544 344 0
FLAG 544 232 OUT3
FLAG -336 -440 IN
SYMBOL voltage -336 -440 R0
SYMATTR Value 3
SYMATTR InstName V1
SYMBOL res -320 40 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res -320 136 R0
SYMATTR InstName R2
SYMATTR Value 221K
SYMBOL cap -416 56 R0
SYMATTR InstName C2
SYMATTR Value 22
SYMBOL ind 176 -136 R270
SYMATTR InstName L1
SYMATTR Value 4.7
SYMBOL res 272 -152 R0
SYMATTR InstName R3
SYMATTR Value 137K
SYMBOL res 272 -56 R0
SYMATTR InstName R4
SYMATTR Value 68.1K
SYMBOL cap 384 -136 R0
SYMATTR InstName C3
SYMATTR Value 10
SYMBOL ind -288 -152 M0
SYMATTR InstName L2
SYMATTR Value 4.7
SYMBOL res 464 -152 R0
SYMATTR InstName Rload2
SYMATTR Value 3
SYMBOL res -544 40 R0
SYMATTR InstName Rload1
SYMATTR Value 4
SYMBOL PowerProducts\\LTC3521 -16 -8 R0
SYMATTR InstName U1
SYMBOL ind 160 248 R270
SYMATTR InstName L3
SYMATTR Value 4.7
SYMBOL res 272 232 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res 272 328 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL cap 400 248 R0
SYMATTR InstName C1
SYMATTR Value 10
SYMBOL res 528 232 R0
SYMATTR InstName Rload3
SYMATTR Value 2