* Z:\home\khalils\Downloads\files\data\raw_asc\LT1621.asc
* Generated by LTspice 26.0.1 for Windows.
* Library below included based on ModelFile attribute of instance XU2 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LT1621.asy)
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LTC1435A.asy)
R5 OUT 0 10
V1 IN 0 23
C12 N001 N015 .1
R4 N010 0 1K
C7 N003 0 56p
C10 N010 0 100p
C11 N007 N010 .033
MQ1 N006 N011 0 0 Si4412DY
R2 OUT N012 1.44Meg
C3 N001 N013 100p
R6 0 N014 15.75K
D1 N001 N008 1N5818
C2 N001 0 4.7
XU1 N003 N005 N007 N001 0 N012 N013 N001 N002 0 N011 N001 IN N006 N008 N004 LTC1435A ;pnba OSC)SOFT)Ith)SFB)SGND)Vosense)SEN-)SEN+)ExtVcc)PGND)BG)IntVcc)Vin)SW)Boost)TG
R1 N009 OUT 25m
C1 N009 OUT .01
XU2 N014 NC_01 N013 N007 NC_02 NC_03 NC_04 NC_05 NC_06 N015 NC_07 NC_08 0 OUT N009 N001 LT1621 ;pnba PROG A)AVE A)Sense A)Iout A)GND B)IN- B)IN+ B)Vcc B)PROG B)AVE B)Sense B)Iout B)GND A)IN- A)IN+ A)Vcc A
R7 N001 N014 3K
MQ2 IN N004 N006 N006 Si4412DY
L1 N006 N009 27
R3 N012 0 110K
C6 N005 0 .001
C8 OUT N012 100p
C9 N012 0 100p
C5 OUT 0 220 Rser=50m
C4 N006 N008 .1
.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
.tran 5m startup
.lib LT1621.sub
.lib LTC1435A.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 4360 2260
WIRE 3200 592 2672 592
WIRE 3376 592 3200 592
WIRE 2896 608 2464 608
WIRE 3376 608 3376 592
WIRE 2672 624 2672 592
WIRE 3200 672 3200 592
WIRE 2464 688 2464 608
WIRE 2496 688 2464 688
WIRE 2880 688 2848 688
WIRE 3376 704 3376 688
WIRE 2416 752 2320 752
WIRE 2496 752 2480 752
WIRE 3152 752 2848 752
WIRE 2352 816 2320 816
WIRE 2496 816 2416 816
WIRE 3200 816 3200 768
WIRE 3200 816 2848 816
WIRE 2384 880 2288 880
WIRE 2496 880 2384 880
WIRE 2928 880 2848 880
WIRE 3088 880 2928 880
WIRE 3200 880 3200 816
WIRE 3200 880 3152 880
WIRE 3232 880 3200 880
WIRE 3344 880 3312 880
WIRE 3360 880 3344 880
WIRE 3456 880 3440 880
WIRE 3520 880 3456 880
WIRE 3616 880 3520 880
WIRE 3760 880 3616 880
WIRE 3872 880 3760 880
WIRE 2288 896 2288 880
WIRE 3760 896 3760 880
WIRE 3872 896 3872 880
WIRE 3200 928 3200 880
WIRE 2896 944 2896 608
WIRE 2896 944 2848 944
WIRE 2928 944 2896 944
WIRE 3616 960 3616 880
WIRE 2288 976 2288 960
WIRE 2288 976 2160 976
WIRE 3520 976 3520 880
WIRE 2160 992 2160 976
WIRE 2288 992 2288 976
WIRE 3760 992 3760 960
WIRE 3872 992 3872 976
WIRE 2496 1008 2448 1008
WIRE 3152 1008 2848 1008
WIRE 2496 1072 2448 1072
WIRE 3200 1072 3200 1024
WIRE 3200 1072 2848 1072
WIRE 2160 1088 2160 1056
WIRE 2288 1088 2288 1072
WIRE 3200 1088 3200 1072
WIRE 2928 1104 2928 944
WIRE 2976 1104 2928 1104
WIRE 2976 1120 2976 1104
WIRE 2976 1200 2976 1184
WIRE 2448 1232 2448 1072
WIRE 3520 1232 3520 1040
WIRE 3520 1232 2448 1232
WIRE 3616 1232 3616 1040
WIRE 3616 1232 3520 1232
WIRE 2448 1248 2448 1232
WIRE 3616 1248 3616 1232
WIRE 2576 1312 2576 1152
WIRE 2640 1312 2576 1312
WIRE 2768 1312 2768 1152
WIRE 2768 1312 2704 1312
WIRE 2880 1312 2768 1312
WIRE 2928 1312 2928 1104
WIRE 2928 1312 2880 1312
WIRE 3072 1312 2928 1312
WIRE 3152 1312 3072 1312
WIRE 2448 1328 2448 1312
WIRE 3616 1344 3616 1328
WIRE 2736 1360 2656 1360
WIRE 2880 1360 2880 1312
WIRE 2880 1360 2816 1360
WIRE 3152 1360 3152 1312
WIRE 2448 1456 2432 1456
WIRE 2656 1456 2656 1360
WIRE 2656 1456 2528 1456
WIRE 2688 1456 2656 1456
WIRE 3072 1456 3072 1312
WIRE 3072 1456 3040 1456
WIRE 3072 1536 3040 1536
WIRE 3344 1536 3344 880
WIRE 3344 1536 3072 1536
WIRE 2576 1616 2576 1312
WIRE 2688 1616 2576 1616
WIRE 3072 1616 3072 1600
WIRE 3072 1616 3040 1616
WIRE 3456 1616 3456 880
WIRE 3456 1616 3072 1616
WIRE 2384 1696 2384 880
WIRE 2688 1696 2384 1696
WIRE 3088 1696 3040 1696
WIRE 3152 1936 3152 1424
WIRE 3152 1936 3040 1936
SYMBOL NMOS 3152 928 R0
SYMATTR InstName Q1
SYMATTR Value Si4412DY
SYMBOL cap 2704 1296 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 100p
SYMBOL PowerProducts\\LT1621 2864 1776 R0
SYMATTR InstName U2
SYMBOL cap 3504 976 R0
SYMATTR InstName C8
SYMATTR Value 100p
SYMBOL cap 3152 864 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value .1
SYMBOL res 3856 880 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 3600 944 R0
SYMATTR InstName R2
SYMATTR Value 1.44Meg
SYMBOL schottky 2912 944 M180
WINDOW 0 40 46 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL VOLTAGE 3376 592 R0
SYMATTR InstName V1
SYMATTR Value 23
SYMBOL cap 2416 800 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value .001
SYMBOL cap 2432 1248 R0
SYMATTR InstName C9
SYMATTR Value 100p
SYMBOL res 2432 1472 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 15.75K
SYMBOL polcap 3744 896 R0
SYMATTR InstName C5
SYMATTR Value 220
SYMATTR SpiceLine Rser=50m
SYMBOL cap 2272 896 R0
SYMATTR InstName C11
SYMATTR Value .033
SYMBOL cap 3056 1536 R0
WINDOW 0 32 20 Left 2
SYMATTR InstName C1
SYMATTR Value .01
SYMBOL cap 2480 736 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value 56p
SYMBOL res 2832 1344 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 3K
SYMBOL RES 3344 896 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 25m
SYMBOL res 3600 1232 R0
SYMATTR InstName R3
SYMATTR Value 110K
SYMBOL res 2272 976 R0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL cap 3136 1360 R0
SYMATTR InstName C12
SYMATTR Value .1
SYMBOL POWERPRODUCTS\\LTC1435A 2672 912 R0
SYMATTR InstName U1
SYMBOL nmos 3152 672 R0
SYMATTR InstName Q2
SYMATTR Value Si4412DY
SYMBOL cap 2144 992 R0
SYMATTR InstName C10
SYMATTR Value 100p
SYMBOL cap 2960 1120 R0
SYMATTR InstName C2
SYMATTR Value 4.7
SYMBOL ind 3216 896 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 27
FLAG 3200 1088 0
FLAG 2448 1008 0
FLAG 2976 1200 0
FLAG 3760 992 0
FLAG 2320 752 0
FLAG 2320 816 0
FLAG 3376 704 0
FLAG 3616 1344 0
FLAG 2448 1328 0
FLAG 2160 1088 0
FLAG 2288 1088 0
FLAG 3872 992 0
FLAG 3872 880 OUT
FLAG 2432 1456 0
FLAG 3088 1696 0
FLAG 3376 592 IN
TEXT 3504 1432 Left 2 !.tran 5m startup