* Z:\home\khalils\Downloads\files\data\raw_asc\LT3909.asc
* Generated by LTspice 26.0.1 for Windows.
* 40mA each
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LT3909.asy)
R4 IN N008 100K
V1 IN 0 12
XU1 N007 IN N003 N009 N007 N002 N005 N008 N006 N004 OUT N001 0 LT3909 ;pnba INTVcc)Vin)EN/UVLO)Iset)Ctrl)FB)PWM)_Fault)LED2)LED1)Vout)SW)GND
C1 N007 0 1
L1 IN N001 6.8 Rser=160m
D1 N004 0 LXHL-BW02 N=10
V2 N005 0 3.3
R3 0 N002 31.6K
R5 IN N003 402K
C2 OUT 0 2.2
R2 OUT N002 787K
D2 N006 0 LXHL-BW02 N=10
R6 N003 0 102K
R1 N009 0 24.9K
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.tran 1m startup
.lib LT3909.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 1156 784
WIRE -272 -48 -368 -48
WIRE -208 -48 -272 -48
WIRE -64 -48 -208 -48
WIRE -32 -48 -64 -48
WIRE 80 -48 48 -48
WIRE 352 -48 208 -48
WIRE 544 -48 352 -48
WIRE -368 -32 -368 -48
WIRE 352 -32 352 -48
WIRE 544 -32 544 -48
WIRE 80 0 80 -48
WIRE 208 0 208 -48
WIRE -208 48 -208 -48
WIRE -368 64 -368 48
WIRE -64 80 -64 -48
WIRE -16 80 -64 80
WIRE 352 80 352 48
WIRE 352 80 304 80
WIRE 416 80 352 80
WIRE 544 80 544 32
WIRE 544 80 496 80
WIRE 544 96 544 80
WIRE -208 160 -208 128
WIRE -16 160 -208 160
WIRE 672 160 304 160
WIRE -208 176 -208 160
WIRE 672 176 672 160
WIRE -16 240 -112 240
WIRE 496 240 304 240
WIRE -112 256 -112 240
WIRE 496 256 496 240
WIRE -208 272 -208 256
WIRE 672 288 672 240
WIRE -16 320 -48 320
WIRE 336 320 304 320
WIRE 448 320 416 320
WIRE -112 352 -112 336
WIRE 496 368 496 320
WIRE -48 432 -48 320
WIRE 48 432 48 400
WIRE 48 432 -48 432
WIRE 144 432 144 400
WIRE 240 432 240 400
WIRE 48 448 48 432
WIRE 48 528 48 512
WIRE 240 528 240 512
WIRE -272 576 -272 -48
WIRE 448 576 448 320
WIRE 448 576 -272 576
SYMBOL res 512 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 31.6K
SYMBOL res 432 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 100K
SYMBOL LED 656 176 R0
WINDOW 123 24 92 Left 2
SYMATTR Value2 N=10
SYMATTR InstName D1
SYMATTR Value LXHL-BW02
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 528 -32 R0
SYMATTR InstName C2
SYMATTR Value 2.2
SYMBOL voltage -368 -48 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap 32 448 R0
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL res -224 160 R0
SYMATTR InstName R6
SYMATTR Value 102K
SYMBOL res 224 416 R0
SYMATTR InstName R1
SYMATTR Value 24.9K
SYMBOL res -224 32 R0
SYMATTR InstName R5
SYMATTR Value 402K
SYMBOL ind2 -48 -32 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 6.8
SYMATTR Type ind
SYMATTR SpiceLine Rser=160m
SYMBOL res 336 -48 R0
SYMATTR InstName R2
SYMATTR Value 787K
SYMBOL LED 480 256 R0
WINDOW 123 24 92 Left 2
SYMATTR Value2 N=10
SYMATTR InstName D2
SYMATTR Value LXHL-BW02
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL LT3909 144 192 R0
SYMATTR InstName U1
SYMBOL voltage -112 240 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 3.3
FLAG 144 432 0
FLAG 240 528 0
FLAG 48 528 0
FLAG 544 96 0
FLAG 544 -48 OUT
FLAG -208 272 0
FLAG -368 64 0
FLAG -368 -48 IN
FLAG 496 368 0
FLAG -112 352 0
FLAG 672 288 0
TEXT -176 528 Left 2 !.tran 1m startup
TEXT 264 520 Left 2 ;40mA each