* Z:\home\khalils\Downloads\files\data\raw_asc\LTC4126-ADJ.asc
* Generated by LTspice 26.0.1 for Windows.
* To reduce simulation time, the safety timer \ntermination period, the fast blink frequency,\nand the slow blink frequency are parametrized.
* Library below included based on ModelFile attribute of instance XU1 (C:\users\khalils\AppData\Local\LTspice\lib\sym\PowerProducts\LTC4126-ADJ.asy)
* Library below included based on ModelFile attribute of instance XU2 (C:\users\khalils\AppData\Local\LTspice\lib\sym\SpecialFunctions\LTC6990.asy)
V1 N001 0 5
R1 N007 0 12.4k
K1 Ltx Lrx 0.2
R3 OUT 0 10k
XU1 0 N002 NC_01 N007 NC_02 N004 ACIN BAT NC_03 NC_04 Vcc OUT 0 LTC4126-ADJ S_Timer=20m f_FAST=4.58k f_SLOW=1.14k ;pnba NTC)EN)_PBEN)PROG)ACPR)_CHRG)ACIN)BAT)STAT2)STAT1)Vcc)OUT)GND
R4 N006 N005 10
C1 OUT 0 2.2
D1 Vcc N004 NSCW100
Ctx N001 N003 47n
Lrx 0 ACIN 13
XU2 N001 0 N008 0 N001 N005 LTC6990 ;pnba OE)GND)SET)DIV)V+)OUT
Crx ACIN 0 47n
CBAT BAT 0 0.1m IC=3.5 Rser=1m
M1 N003 N006 0 0 Si2316DS
Ltx N003 N001 6.8
V2 N002 0 3.3
R2 N008 0 243k
.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 25m startup
.lib LTC4126-ADJ.sub
.lib LTC6990.sub
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 880 680
WIRE -672 -176 -880 -176
WIRE -544 -176 -672 -176
WIRE -432 -176 -544 -176
WIRE -192 -176 -304 -176
WIRE -32 -176 -192 -176
WIRE 16 -176 -32 -176
WIRE 496 -176 400 -176
WIRE -880 -144 -880 -176
WIRE -544 -144 -544 -176
WIRE -432 -144 -432 -176
WIRE -304 -144 -304 -176
WIRE -192 -144 -192 -176
WIRE 496 -144 496 -176
WIRE -16 -80 -112 -80
WIRE 16 -80 -16 -80
WIRE -112 -64 -112 -80
WIRE -304 -48 -304 -64
WIRE -192 -48 -192 -80
WIRE -880 -32 -880 -64
WIRE -544 -32 -544 -80
WIRE -432 -32 -432 -64
WIRE -432 -32 -544 -32
WIRE 496 -32 496 -64
WIRE -112 16 -112 0
WIRE 16 16 -112 16
WIRE -672 96 -672 -176
WIRE -672 96 -992 96
WIRE -432 96 -432 -32
WIRE 432 144 400 144
WIRE 608 144 432 144
WIRE 608 160 608 144
WIRE -992 176 -992 96
WIRE -944 176 -992 176
WIRE -640 176 -720 176
WIRE -480 176 -560 176
WIRE -432 240 -432 192
WIRE 16 240 -16 240
WIRE -944 256 -976 256
WIRE -672 256 -672 96
WIRE -672 256 -720 256
WIRE 16 288 -80 288
WIRE 432 288 400 288
WIRE 448 288 432 288
WIRE 544 288 448 288
WIRE 608 288 608 224
WIRE -80 304 -80 288
WIRE 448 304 448 288
WIRE 544 304 544 288
WIRE -944 336 -976 336
WIRE -688 336 -720 336
WIRE -976 384 -976 336
WIRE -80 400 -80 384
WIRE 208 400 208 368
WIRE 448 400 448 368
WIRE 544 400 544 384
WIRE -976 496 -976 464
SYMBOL res -96 288 R0
SYMATTR InstName R1
SYMATTR Value 12.4k
SYMBOL cap -560 -144 R0
WINDOW 39 24 36 Left 2
SYMATTR InstName Ctx
SYMATTR Value 47n
SYMBOL cap -208 -144 R0
WINDOW 39 24 36 Left 2
SYMATTR InstName Crx
SYMATTR Value 47n
SYMBOL cap 432 304 R0
SYMATTR InstName C1
SYMATTR Value 2.2
SYMBOL LTC6990 -832 256 R0
SYMATTR InstName U2
SYMBOL voltage 496 -160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL res -992 368 R0
SYMATTR InstName R2
SYMATTR Value 243k
SYMBOL LED -128 -64 R0
SYMATTR InstName D1
SYMATTR Value NSCW100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL nmos -480 96 R0
SYMATTR InstName M1
SYMATTR Value Si2316DS
SYMBOL voltage -880 -160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res -544 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10
SYMBOL res 528 288 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap 592 160 R0
WINDOW 123 24 84 Left 2
WINDOW 39 24 112 Left 2
SYMATTR Value2 IC=3.5
SYMATTR SpiceLine Rser=1m
SYMATTR InstName BAT
SYMATTR Value 0.1m
SYMBOL ind2 -448 -48 M180
WINDOW 0 43 84 Left 2
WINDOW 3 47 33 Left 2
SYMATTR InstName Ltx
SYMATTR Value 6.8
SYMATTR Type ind
SYMBOL LTC4126-ADJ 208 80 R0
SYMATTR InstName U1
SYMATTR Value2 S_Timer=20m
SYMBOL ind2 -288 -48 R180
WINDOW 0 -33 84 Left 2
WINDOW 3 -37 33 Left 2
SYMATTR InstName Lrx
SYMATTR Value 13
SYMATTR Type ind
FLAG 208 400 0
FLAG -192 -48 0
FLAG -304 -48 0
FLAG -80 400 0
FLAG -16 240 0
FLAG 448 400 0
FLAG 608 288 0
FLAG -32 -176 ACIN
FLAG -16 -80 Vcc
FLAG 432 144 BAT
FLAG 432 288 OUT
FLAG 496 -32 0
FLAG 544 400 0
FLAG -432 240 0
FLAG -688 336 0
FLAG -880 -32 0
FLAG -976 256 0
FLAG -976 496 0
TEXT -320 528 Left 2 !.tran 25m startup
TEXT -440 -208 Left 2 !K1 Ltx Lrx 0.2
TEXT 0 472 Left 2 ;To reduce simulation time, the safety timer \ntermination period, the fast blink frequency,\nand the slow blink frequency are parametrized.