Version 4
SHEET 1 3200 984
WIRE -2336 -3760 -2784 -3760
WIRE -2096 -3760 -2336 -3760
WIRE -2016 -3760 -2096 -3760
WIRE -1888 -3760 -1920 -3760
WIRE -1776 -3760 -1888 -3760
WIRE -1632 -3760 -1776 -3760
WIRE -1472 -3760 -1536 -3760
WIRE -1408 -3760 -1472 -3760
WIRE -1312 -3760 -1408 -3760
WIRE -1248 -3760 -1312 -3760
WIRE -2784 -3744 -2784 -3760
WIRE -1888 -3744 -1888 -3760
WIRE -1408 -3744 -1408 -3760
WIRE -1776 -3728 -1776 -3760
WIRE -2096 -3680 -2096 -3760
WIRE -1408 -3664 -1408 -3680
WIRE -1312 -3664 -1312 -3760
WIRE -2784 -3648 -2784 -3664
WIRE -1936 -3632 -1936 -3712
WIRE -1888 -3632 -1888 -3664
WIRE -1888 -3632 -1936 -3632
WIRE -1776 -3632 -1776 -3664
WIRE -1776 -3632 -1888 -3632
WIRE -1616 -3632 -1616 -3712
WIRE -1616 -3632 -1776 -3632
WIRE -2096 -3584 -2096 -3600
WIRE -1472 -3552 -1472 -3760
WIRE -2336 -3536 -2336 -3760
WIRE -2208 -3536 -2224 -3536
WIRE -1968 -3536 -1984 -3536
WIRE -1472 -3456 -1472 -3472
WIRE -1472 -3456 -1600 -3456
WIRE -1472 -3440 -1472 -3456
WIRE -2336 -3424 -2336 -3456
WIRE -2208 -3424 -2336 -3424
WIRE -1936 -3424 -1984 -3424
WIRE -1776 -3424 -1776 -3632
WIRE -1776 -3424 -1856 -3424
WIRE -2336 -3408 -2336 -3424
WIRE -1472 -3344 -1472 -3360
WIRE -2336 -3312 -2336 -3328
WIRE -2208 -3312 -2240 -3312
WIRE -1312 -3312 -1312 -3584
WIRE -1312 -3312 -1984 -3312
WIRE -1248 -3312 -1312 -3312
WIRE -2096 -3248 -2096 -3264
WIRE -2240 -3216 -2240 -3312
WIRE -1600 -3216 -1600 -3456
WIRE -1600 -3216 -2240 -3216
FLAG -2096 -3248 0
FLAG -1408 -3664 0
FLAG -2336 -3312 0
FLAG -1472 -3344 0
FLAG -1248 -3312 _RESET
FLAG -1248 -3760 OUT
FLAG -2784 -3648 0
FLAG -1968 -3536 0
SYMBOL res -1840 -3440 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res -1328 -3680 R0
SYMATTR InstName R2
SYMATTR Value 10Meg
SYMBOL res -2352 -3552 R0
SYMATTR InstName R3
SYMATTR Value 5.6Meg
SYMBOL res -2352 -3424 R0
SYMATTR InstName R4
SYMATTR Value 402K
SYMBOL cap -1424 -3744 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res -1488 -3568 R0
SYMATTR InstName R5
SYMATTR Value 6.04Meg
SYMBOL res -1488 -3456 R0
SYMATTR InstName R6
SYMATTR Value 402K
SYMBOL voltage -2784 -3760 R0
WINDOW 123 24 138 Left 2
WINDOW 39 24 117 Left 2
SYMATTR Value PWL(0 0 200 9 400 0 400.001 -3)
SYMATTR InstName Vbat
SYMBOL res -1904 -3760 R0
SYMATTR InstName R7
SYMATTR Value 1Meg
SYMBOL zener -1792 -3664 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BZX84C15L
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL pmos -1536 -3712 M270
WINDOW 0 53 49 VTop 2
WINDOW 3 -13 69 VLeft 2
SYMATTR InstName Q1
SYMATTR Value Si4427DY
SYMBOL pmos -2016 -3712 R270
WINDOW 0 54 47 VTop 2
WINDOW 3 -12 75 VLeft 2
SYMATTR InstName Q2
SYMATTR Value Si4427DY
SYMBOL res -2112 -3696 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL LTC2960-2 -2096 -3424 R0
SYMATTR InstName U1
TEXT -1952 -3816 Bottom 2 ;Prevention of Excessive Battery Drain in Low Battery Conditions
TEXT -2784 -3760 Bottom 2 ;6V to 8.4V
TEXT -1520 -3256 Left 2 !.tran 400