* Z:\home\khalils\Downloads\files\data\raw_asc\LT1620S8.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\LT1620S8.asy)
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LTC1435A.asy)
MQ1 N006 N011 0 0 Si4412DY
C4 N006 N008 .1
C8 OUT N012 100p
R5 0 N015 15.75K
R3 N012 0 110K
C10 N010 0 100p
C9 N012 0 100p
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
C7 N003 0 56p
C2 N001 0 4.7
C5 OUT 0 220 Rser=50m
XU2 N013 N007 0 OUT N009 N001 N015 N014 LT1620S8 ;pnba Sense)Iout)GND)IN-)IN+)Vcc)PROG)AVE
C6 N005 0 .001
C3 N001 N013 100p
C11 N007 N010 .033
C12 N001 N014 .1
R2 OUT N012 1.44Meg
L1 N006 N009 27
V1 IN 0 23
Rload OUT 0 10
R4 N001 N015 3K
R6 N010 0 1K
R1 N009 OUT 25m
MQ2 IN N004 N006 N006 Si4412DY
C1 N009 OUT .01
D1 N001 N008 1N5818
.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 LT1620S8.sub
.lib LTC1435A.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 4360 1928
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 3280 880 3200 880
WIRE 3408 880 3360 880
WIRE 3424 880 3408 880
WIRE 3520 880 3504 880
WIRE 3584 880 3520 880
WIRE 3680 880 3584 880
WIRE 3824 880 3680 880
WIRE 3936 880 3824 880
WIRE 2288 896 2288 880
WIRE 3824 896 3824 880
WIRE 3936 896 3936 880
WIRE 3200 928 3200 880
WIRE 2896 944 2896 608
WIRE 2896 944 2848 944
WIRE 2928 944 2896 944
WIRE 3680 960 3680 880
WIRE 2288 976 2288 960
WIRE 2288 976 2160 976
WIRE 3584 976 3584 880
WIRE 2160 992 2160 976
WIRE 2288 992 2288 976
WIRE 3824 992 3824 960
WIRE 3936 992 3936 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 1120 2928 944
WIRE 2976 1120 2928 1120
WIRE 3056 1120 3040 1120
WIRE 2448 1168 2448 1072
WIRE 3584 1168 3584 1040
WIRE 3584 1168 2448 1168
WIRE 3680 1168 3680 1040
WIRE 3680 1168 3584 1168
WIRE 2448 1184 2448 1168
WIRE 3680 1184 3680 1168
WIRE 2576 1248 2576 1152
WIRE 2640 1248 2576 1248
WIRE 2768 1248 2768 1152
WIRE 2768 1248 2704 1248
WIRE 2928 1248 2928 1120
WIRE 2928 1248 2768 1248
WIRE 3152 1248 2928 1248
WIRE 3232 1248 3152 1248
WIRE 2448 1264 2448 1248
WIRE 3152 1264 3152 1248
WIRE 3680 1280 3680 1264
WIRE 2928 1312 2928 1248
WIRE 3232 1312 3232 1248
WIRE 2576 1376 2576 1248
WIRE 2784 1376 2576 1376
WIRE 3152 1376 3152 1328
WIRE 3152 1376 3072 1376
WIRE 2384 1456 2384 880
WIRE 2784 1456 2384 1456
WIRE 3232 1456 3232 1392
WIRE 3232 1456 3072 1456
WIRE 3248 1456 3232 1456
WIRE 3344 1456 3328 1456
WIRE 2784 1536 2752 1536
WIRE 3152 1536 3072 1536
WIRE 3408 1536 3408 880
WIRE 3408 1536 3152 1536
WIRE 3152 1568 3152 1536
WIRE 2928 1616 2928 1600
WIRE 2752 1664 2752 1536
WIRE 3152 1664 3152 1632
WIRE 3152 1664 2752 1664
WIRE 3520 1664 3520 880
WIRE 3520 1664 3152 1664
SYMBOL polcap 3808 896 R0
SYMATTR InstName C5
SYMATTR Value 220
SYMATTR SpiceLine Rser=50m
SYMBOL cap 2432 1184 R0
SYMATTR InstName C9
SYMATTR Value 100p
SYMBOL cap 3568 976 R0
SYMATTR InstName C8
SYMATTR Value 100p
SYMBOL RES 3408 896 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 25m
SYMBOL ind 3264 896 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 27
SYMBOL nmos 3152 672 R0
SYMATTR InstName Q2
SYMATTR Value Si4412DY
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 3664 1168 R0
SYMATTR InstName R3
SYMATTR Value 110K
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 2480 736 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value 56p
SYMBOL res 3664 944 R0
SYMATTR InstName R2
SYMATTR Value 1.44Meg
SYMBOL PowerProducts\\LT1620S8 2928 1456 R0
SYMATTR InstName U2
SYMBOL res 3920 880 R0
SYMATTR InstName Rload
SYMATTR Value 10
SYMBOL res 3216 1296 R0
SYMATTR InstName R4
SYMATTR Value 3K
SYMBOL schottky 2912 944 M180
WINDOW 0 40 46 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL cap 2704 1232 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 100p
SYMBOL NMOS 3152 928 R0
SYMATTR InstName Q1
SYMATTR Value Si4412DY
SYMBOL res 3344 1440 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 15.75K
SYMBOL POWERPRODUCTS\\LTC1435A 2672 912 R0
SYMATTR InstName U1
SYMBOL cap 3136 1568 R0
SYMATTR InstName C1
SYMATTR Value .01
SYMBOL cap 2272 896 R0
SYMATTR InstName C11
SYMATTR Value .033
SYMBOL res 2272 976 R0
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL cap 2976 1136 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 4.7
SYMBOL VOLTAGE 3376 592 R0
SYMATTR InstName V1
SYMATTR Value 23
SYMBOL cap 2144 992 R0
SYMATTR InstName C10
SYMATTR Value 100p
SYMBOL cap 3136 1264 R0
SYMATTR InstName C12
SYMATTR Value .1
FLAG 3200 1088 0
FLAG 2928 1616 0
FLAG 2448 1008 0
FLAG 3056 1120 0
FLAG 3824 992 0
FLAG 2320 752 0
FLAG 2320 816 0
FLAG 3376 704 0
FLAG 3680 1280 0
FLAG 2448 1264 0
FLAG 3344 1456 0
FLAG 2160 1088 0
FLAG 2288 1088 0
FLAG 3936 992 0
FLAG 3936 880 OUT
FLAG 3376 592 IN
TEXT 3568 1368 Left 2 !.tran 5m startup