* SPICE netlist
R21 L1_OUT N002 649k
R22 N002 0 1Meg
R24 vBUCK1 N003 500k
R25 N003 0 1Meg
L4 N009 vBUCK4 1
R3 vBUCK2 N005 1Meg
R4 N005 0 1Meg
L1 N001 vBUCK1 1
R5 vBUCK3 N008 1Meg
R6 N008 0 1Meg
L2 N004 vBUCK2 1
R7 vBUCK4 N010 1Meg
R8 N010 0 1Meg
L3 N007 vBUCK3 1
V1 vIN 0 3.5
R1 vBUCK2 0 5
R9 vBUCK3 0 5
R10 vBUCK4 0 5
C1 vBUCK1 0 22
C2 vBUCK2 0 47
C3 vBUCK3 0 47
C4 vBUCK4 0 47
C5 L1_OUT 0 1
R2 L2_OUT N006 649k
C6 L2_OUT 0 1
R11 N006 0 1Meg
R12 L2_OUT 0 5
C7 L3_OUT 0 1
R13 L3_OUT 0 15
R14 vBUCK1 0 5k
R15 L1_OUT 0 5
R16 PG vIN 2000
C8 vBUCK1 N003 10p
XU1 N006 vIN L2_OUT L3_OUT vIN L1_OUT vIN N002 vBUCK4 L2_OUT N001 0 MP_01 MP_02 vIN vIN vIN vBUCK1 MP_03 N004 vIN N005 N003 N010 N008 MP_04 vIN MP_05 MP_06 L1_OUT N007 MP_07 MP_08 vBUCK2 vIN vIN vBUCK3 MP_09 PG N009 LT3383 ;pnba FB_L2)Vin_L2)LDO2)LDO3)Vin_L3)LDO1)Vin_L1)FB_L1)EN_L1)EN_L3)SW1)GND)))PVin1)PVin2)EN_B1)EN_B2))SW2)PWR_ON)FB_B2)FB_B1)FB_B4)FB_B3))Vin)))EN_L2)SW3)))EN_B3)PVin3)PVin4)EN_B4))PGOOD)SW4
.tran 25m startup

* LTspice schematic (.asc)
Version 4
SHEET 1 1456 1760
WIRE -104 -880 -200 -880
WIRE -8 -880 -104 -880
WIRE -200 -848 -200 -880
WIRE -200 -752 -200 -768
WIRE -8 -704 -8 -880
WIRE -152 -656 -168 -656
WIRE 152 -656 136 -656
WIRE -648 -560 -696 -560
WIRE -552 -560 -648 -560
WIRE -344 -560 -552 -560
WIRE -152 -560 -344 -560
WIRE 200 -560 136 -560
WIRE 328 -560 280 -560
WIRE 408 -560 328 -560
WIRE 568 -560 408 -560
WIRE 728 -560 568 -560
WIRE 408 -528 408 -560
WIRE 728 -528 728 -560
WIRE -696 -512 -696 -560
WIRE -552 -512 -552 -560
WIRE -344 -512 -344 -560
WIRE 328 -512 328 -560
WIRE 568 -512 568 -560
WIRE -152 -464 -248 -464
WIRE 216 -464 136 -464
WIRE 328 -416 328 -432
WIRE 408 -416 408 -464
WIRE 408 -416 328 -416
WIRE -696 -400 -696 -432
WIRE -552 -400 -552 -448
WIRE -488 -400 -552 -400
WIRE -344 -400 -344 -432
WIRE -344 -400 -408 -400
WIRE -248 -400 -248 -464
WIRE -248 -400 -344 -400
WIRE 216 -400 216 -464
WIRE 328 -400 328 -416
WIRE 328 -400 216 -400
WIRE 408 -400 328 -400
WIRE 568 -400 568 -448
WIRE 568 -400 488 -400
WIRE 728 -400 728 -448
WIRE -152 -368 -168 -368
WIRE 152 -368 136 -368
WIRE -664 -272 -712 -272
WIRE -552 -272 -664 -272
WIRE -152 -272 -552 -272
WIRE 200 -272 136 -272
WIRE 328 -272 280 -272
WIRE 568 -272 328 -272
WIRE 728 -272 568 -272
WIRE 728 -240 728 -272
WIRE -712 -224 -712 -272
WIRE -552 -224 -552 -272
WIRE 328 -224 328 -272
WIRE 568 -224 568 -272
WIRE -152 -176 -168 -176
WIRE 216 -176 136 -176
WIRE -712 -112 -712 -144
WIRE -552 -112 -552 -160
WIRE 216 -112 216 -176
WIRE 328 -112 328 -144
WIRE 328 -112 216 -112
WIRE 408 -112 328 -112
WIRE 568 -112 568 -160
WIRE 568 -112 488 -112
WIRE 728 -112 728 -160
WIRE -664 -80 -712 -80
WIRE -552 -80 -664 -80
WIRE -344 -80 -552 -80
WIRE -152 -80 -344 -80
WIRE 152 -80 136 -80
WIRE -712 -32 -712 -80
WIRE -552 -32 -552 -80
WIRE -344 -32 -344 -80
WIRE -152 16 -248 16
WIRE 184 16 136 16
WIRE 312 16 264 16
WIRE 552 16 312 16
WIRE 712 16 552 16
WIRE 712 48 712 16
WIRE -552 64 -552 32
WIRE -488 64 -552 64
WIRE -344 64 -344 48
WIRE -344 64 -408 64
WIRE -248 64 -248 16
WIRE -248 64 -344 64
WIRE 312 64 312 16
WIRE 552 64 552 16
WIRE -712 80 -712 48
WIRE -552 112 -552 64
WIRE -152 112 -168 112
WIRE 200 112 136 112
WIRE 200 176 200 112
WIRE 312 176 312 144
WIRE 312 176 200 176
WIRE 392 176 312 176
WIRE 552 176 552 128
WIRE 552 176 472 176
WIRE 712 176 712 128
WIRE -152 208 -168 208
WIRE 152 208 136 208
WIRE -152 304 -216 304
WIRE 184 304 136 304
WIRE 312 304 264 304
WIRE 552 304 312 304
WIRE 712 304 552 304
WIRE 712 336 712 304
WIRE 312 352 312 304
WIRE 552 352 552 304
WIRE -152 400 -216 400
WIRE 200 400 136 400
WIRE 200 464 200 400
WIRE 312 464 312 432
WIRE 312 464 200 464
WIRE 392 464 312 464
WIRE 552 464 552 416
WIRE 552 464 472 464
WIRE 712 464 712 416
WIRE -152 496 -216 496
WIRE 168 496 136 496
WIRE 168 560 168 496
WIRE 216 560 168 560
WIRE 248 560 216 560
WIRE 360 560 328 560
WIRE -152 592 -216 592
WIRE -152 688 -216 688
WIRE -152 784 -216 784
WIRE -8 880 -8 832
FLAG -200 -752 0
FLAG -104 -880 vIN
FLAG -8 880 0
FLAG -696 -400 0
FLAG -168 -656 vIN
FLAG 568 -400 0
FLAG 152 -656 vIN
FLAG -168 -368 vIN
FLAG 728 -112 0
FLAG 568 -112 0
FLAG 152 -368 vIN
FLAG 712 176 0
FLAG 552 176 0
FLAG 152 -80 vIN
FLAG 712 464 0
FLAG 552 464 0
FLAG 152 208 vIN
FLAG -552 -400 0
FLAG -712 80 0
FLAG -552 112 0
FLAG -168 -176 vIN
FLAG -712 -112 0
FLAG -552 -112 0
FLAG 728 -272 vBUCK2
FLAG 728 -560 vBUCK1
FLAG 360 560 vIN
FLAG -648 -560 L1_OUT
FLAG -664 -272 L3_OUT
FLAG -664 -80 L2_OUT
FLAG 712 16 vBUCK3
FLAG 712 304 vBUCK4
FLAG -216 400 vBUCK2
FLAG -216 496 vBUCK3
FLAG -216 592 vBUCK4
FLAG -216 688 L1_OUT
FLAG -216 784 L2_OUT
FLAG 216 560 PG
FLAG -168 208 vIN
FLAG -168 112 vIN
FLAG 728 -400 0
FLAG -216 304 vBUCK1
SYMBOL res -360 -528 R0
SYMATTR InstName R21
SYMATTR Value 649k
SYMBOL res -392 -384 M270
SYMATTR InstName R22
SYMATTR Value 1Meg
SYMBOL res 312 -528 R0
SYMATTR InstName R24
SYMATTR Value 500k
SYMBOL res 392 -416 M90
SYMATTR InstName R25
SYMATTR Value 1Meg
SYMBOL ind 168 320 R270
SYMATTR InstName L4
SYMATTR Value 1
SYMBOL res 312 -240 R0
SYMATTR InstName R3
SYMATTR Value 1Meg
SYMBOL res 392 -128 M90
SYMATTR InstName R4
SYMATTR Value 1Meg
SYMBOL ind 184 -544 R270
SYMATTR InstName L1
SYMATTR Value 1
SYMBOL res 296 48 R0
SYMATTR InstName R5
SYMATTR Value 1Meg
SYMBOL res 376 160 M90
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL ind 184 -256 R270
SYMATTR InstName L2
SYMATTR Value 1
SYMBOL res 296 336 R0
SYMATTR InstName R7
SYMATTR Value 1Meg
SYMBOL res 376 448 M90
SYMATTR InstName R8
SYMATTR Value 1Meg
SYMBOL ind 168 32 R270
SYMATTR InstName L3
SYMATTR Value 1
SYMBOL voltage -200 -864 R0
SYMATTR InstName V1
SYMATTR Value 3.5
SYMBOL res 712 -256 R0
SYMATTR InstName R1
SYMATTR Value 5
SYMBOL res 696 32 R0
SYMATTR InstName R9
SYMATTR Value 5
SYMBOL res 696 320 R0
SYMATTR InstName R10
SYMATTR Value 5
SYMBOL cap 552 -512 R0
SYMATTR InstName C1
SYMATTR Value 22
SYMBOL cap 552 -224 R0
SYMATTR InstName C2
SYMATTR Value 47
SYMBOL cap 536 64 R0
SYMATTR InstName C3
SYMATTR Value 47
SYMBOL cap 536 352 R0
SYMATTR InstName C4
SYMATTR Value 47
SYMBOL cap -568 -512 R0
SYMATTR InstName C5
SYMATTR Value 1
SYMBOL res -360 -48 R0
SYMATTR InstName R2
SYMATTR Value 649k
SYMBOL cap -568 -32 R0
SYMATTR InstName C6
SYMATTR Value 1
SYMBOL res -392 80 M270
SYMATTR InstName R11
SYMATTR Value 1Meg
SYMBOL res -728 -48 R0
SYMATTR InstName R12
SYMATTR Value 5
SYMBOL cap -568 -224 R0
SYMATTR InstName C7
SYMATTR Value 1
SYMBOL res -728 -240 R0
SYMATTR InstName R13
SYMATTR Value 15
SYMBOL res 712 -544 R0
SYMATTR InstName R14
SYMATTR Value 5k
SYMBOL res -712 -528 R0
SYMATTR InstName R15
SYMATTR Value 5
SYMBOL res 232 576 R270
SYMATTR InstName R16
SYMATTR Value 2000
SYMBOL cap 392 -528 R0
SYMATTR InstName C8
SYMATTR Value 10p
SYMBOL LT3383 -8 16 R0
SYMATTR InstName U1