* Z:\home\khalils\Downloads\files\data\raw_asc\LTC3725.asc
* Generated by LTspice 26.0.1 for Windows.
R1 N015 0 105K
R2 IN N009 1K
R3 IN N010 115K
R4 N010 0 15K
V1 IN 0 12
C1 N014 0 1
MQ1 N003 N005 N007 N007 Si7370DP
R5 N007 0 10m
L1 N003 IN 20 Rser=50m
L2 0 N001 200 Rser=.2 Rpar=5K
D1 N001 N002 1N5817
D2 0 N002 1N5817
C2 OUT 0 20
L3 N002 OUT 25 Rpar=2.5K
C3 N016 0 .001
C4 N012 0 470p
C5 N008 N011 .002 Rser=1K
C6 OUT N013 .01 Rpar=1K
R6 N008 0 2.49K
C7 OUT N008 .001 Rser=1K Rpar=21.5K
XU1 N010 N016 N009 N012 N015 0 N005 N014 0 N006 0 LTC3725 ;pnba UVLO)SSFLT)Ndrv)FB/IN+)FS/IN-)PGND)Gate)Vcc)VSLMT)IS)GND
D3 N004 N014 MMSD4148
D4 IN N004 MMSD4148
R7 N007 N006 100
C8 N006 0 500p
R8 OUT N017 4.8K
Rload OUT 0 50
XU2 N013 N011 N012 0 NC_01 MOC205 Igain=2.44m ;pnba A)K)C)E)B
XU3 N011 NC_02 N017 NC_03 0 0 NC_04 N008 LT1431 ;pnba Coll)Comp)V+)Rtop)GND-S)GND-F)Rmid)Ref
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.model NMOS NMOS
.model PMOS PMOS
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.mos
K1 L1 L2 1
.tran 1m startup
* Library below included based on ModelFile attribute of instance XU3 (C:\users\khalils\AppData\Local\LTspice\lib\sym\References\LT1431.asy)
.lib LT1431.sub
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LTC3725.asy)
.lib LTC3725.sub
* Library below included based on ModelFile attribute of instance XU2 (C:\users\khalils\AppData\Local\LTspice\lib\sym\Optos\MOC207.asy)
.lib MOC205.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 2232 1792
WIRE -160 -240 -256 -240
WIRE 32 -240 -160 -240
WIRE 208 -240 32 -240
WIRE 448 -240 208 -240
WIRE 608 -240 592 -240
WIRE 704 -240 672 -240
WIRE 736 -240 704 -240
WIRE 848 -240 816 -240
WIRE 912 -240 848 -240
WIRE 976 -240 912 -240
WIRE 208 -224 208 -240
WIRE 448 -224 448 -240
WIRE 496 -224 448 -224
WIRE 592 -224 592 -240
WIRE 592 -224 544 -224
WIRE -160 -208 -160 -240
WIRE 496 -208 496 -224
WIRE 544 -208 544 -224
WIRE 848 -208 848 -240
WIRE 976 -208 976 -240
WIRE 704 -192 704 -240
WIRE 208 -128 208 -144
WIRE 496 -112 496 -128
WIRE 496 -112 448 -112
WIRE 544 -112 544 -128
WIRE 592 -112 544 -112
WIRE 32 -96 32 -240
WIRE 592 -96 592 -112
WIRE 704 -96 704 -128
WIRE 704 -96 592 -96
WIRE 848 -96 848 -144
WIRE 848 -96 704 -96
WIRE 976 -96 976 -128
WIRE 976 -96 848 -96
WIRE 976 -80 976 -96
WIRE -160 -48 -160 -144
WIRE 400 -32 176 -32
WIRE 240 32 224 32
WIRE 320 32 304 32
WIRE 352 32 320 32
WIRE 448 32 448 -16
WIRE 448 32 432 32
WIRE -256 48 -256 -240
WIRE 448 48 448 32
WIRE 912 64 912 -240
WIRE 976 64 912 64
WIRE 1264 64 1040 64
WIRE 1280 64 1264 64
WIRE 1376 64 1360 64
WIRE 32 80 32 -16
WIRE 176 80 176 -32
WIRE 320 80 320 32
WIRE 448 144 448 128
WIRE -256 160 -256 128
WIRE -80 160 -256 160
WIRE -256 176 -256 160
WIRE 1088 176 960 176
WIRE 1264 176 1264 64
WIRE 1264 176 1152 176
WIRE 464 192 416 192
WIRE 560 192 464 192
WIRE 800 192 752 192
WIRE 912 192 912 64
WIRE 912 192 864 192
WIRE 464 208 464 192
WIRE 560 256 544 256
WIRE -256 272 -256 256
WIRE -160 272 -160 16
WIRE -80 272 -160 272
WIRE 464 288 464 272
WIRE 960 288 960 176
WIRE 960 288 752 288
WIRE 992 288 960 288
WIRE 1264 288 1264 176
WIRE 1264 288 1248 288
WIRE 912 320 912 192
WIRE -160 352 -160 336
WIRE 464 352 416 352
WIRE 464 368 464 352
WIRE -80 384 -160 384
WIRE -160 400 -160 384
WIRE 912 416 912 400
WIRE 992 416 912 416
WIRE 1264 416 1248 416
WIRE 464 464 464 448
WIRE 32 480 32 464
WIRE 176 480 176 464
WIRE 320 480 320 464
WIRE 1264 480 1248 480
FLAG 320 480 0
FLAG 176 480 0
FLAG 464 464 0
FLAG -256 272 0
FLAG 208 -128 0
FLAG -160 352 0
FLAG 448 144 0
FLAG 976 -80 0
FLAG 464 288 0
FLAG -160 464 0
FLAG 544 256 0
FLAG 1264 480 0
FLAG 1264 416 0
FLAG 1376 64 0
FLAG 976 -240 OUT
FLAG 32 480 0
FLAG 224 32 0
FLAG 208 -240 IN
SYMBOL res 448 352 R0
SYMATTR InstName R1
SYMATTR Value 105K
SYMBOL res 16 -112 R0
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res -272 32 R0
SYMATTR InstName R3
SYMATTR Value 115K
SYMBOL res -272 160 R0
WINDOW 3 33 79 Left 2
SYMATTR Value 15K
SYMATTR InstName R4
SYMBOL voltage 208 -240 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL cap -176 272 R0
WINDOW 0 31 20 Left 2
SYMATTR InstName C1
SYMATTR Value 1
SYMBOL nmos 400 -112 R0
SYMATTR InstName Q1
SYMATTR Value Si7370DP
SYMBOL res 432 32 R0
SYMATTR InstName R5
SYMATTR Value 10m
SYMBOL ind2 480 -112 M180
WINDOW 0 2 68 Right 2
WINDOW 3 3 43 Right 2
SYMATTR InstName L1
SYMATTR Value 20
SYMATTR Type ind
SYMATTR SpiceLine Rser=50m
SYMBOL ind2 560 -112 R180
WINDOW 0 0 69 Right 2
WINDOW 3 0 41 Right 2
SYMATTR InstName L2
SYMATTR Value 200
SYMATTR Type ind
SYMATTR SpiceLine Rser=.2 Rpar=5K
SYMBOL schottky 608 -224 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky 688 -128 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 832 -208 R0
WINDOW 39 22 63 Left 2
SYMATTR Value 20
SYMATTR InstName C2
SYMBOL ind 720 -224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L3
SYMATTR Value 25
SYMATTR SpiceLine Rpar=2.5K
SYMBOL cap -176 400 R0
WINDOW 0 24 14 Left 2
WINDOW 3 25 50 Left 2
SYMATTR InstName C3
SYMATTR Value .001
SYMBOL cap 448 208 R0
SYMATTR InstName C4
SYMATTR Value 470p
SYMBOL cap 1152 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 123 57 32 VTop 2
WINDOW 39 88 32 VTop 2
SYMATTR InstName C5
SYMATTR Value .002
SYMATTR Value2 Rser=1K
SYMBOL cap 864 176 R90
WINDOW 0 -3 33 VBottom 2
WINDOW 3 33 31 VTop 2
WINDOW 39 61 32 VTop 2
SYMATTR InstName C6
SYMATTR Value .01
SYMATTR SpiceLine Rpar=1K
SYMBOL res 1264 80 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 2.49K
SYMBOL cap 976 80 R270
WINDOW 123 -24 29 VBottom 2
WINDOW 0 34 34 VTop 2
WINDOW 3 -1 33 VBottom 2
WINDOW 39 -49 35 VBottom 2
SYMATTR Value2 Rser=1K
SYMATTR InstName C7
SYMATTR Value .001
SYMATTR SpiceLine Rpar=21.5K
SYMBOL PowerProducts\\LTC3725 176 272 R0
SYMATTR InstName U1
SYMBOL diode -176 -48 R0
SYMATTR InstName D3
SYMATTR Value MMSD4148
SYMBOL diode -176 -208 R0
SYMATTR InstName D4
SYMATTR Value MMSD4148
SYMBOL res 448 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL cap 304 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 500p
SYMBOL res 896 304 R0
SYMATTR InstName R8
SYMATTR Value 4.8K
SYMBOL res 960 -224 R0
SYMATTR InstName Rload
SYMATTR Value 50
SYMBOL optos\\MOC207 656 256 M0
SYMATTR InstName U2
SYMBOL LT1431 1120 384 R0
SYMATTR InstName U3
TEXT 520 -224 Bottom 2 !K1 L1 L2 1
TEXT 664 392 Left 2 !.tran 1m startup