Version 4
SHEET 1 1032 680
WIRE -368 -128 -384 -128
WIRE -256 -128 -368 -128
WIRE 64 -128 -256 -128
WIRE 80 -128 64 -128
WIRE 224 -128 176 -128
WIRE 304 -128 224 -128
WIRE 448 -128 400 -128
WIRE 560 -128 448 -128
WIRE 640 -128 560 -128
WIRE 688 -128 640 -128
WIRE -256 -64 -256 -128
WIRE 560 -64 560 -128
WIRE 688 -64 688 -128
WIRE -384 -16 -384 -128
WIRE 160 16 160 0
WIRE 320 16 320 -80
WIRE 320 16 160 16
WIRE 64 48 64 -128
WIRE 224 48 224 -128
WIRE 320 48 320 16
WIRE 448 48 448 -128
WIRE -256 112 -256 16
WIRE -144 112 -256 112
WIRE 16 112 -144 112
WIRE -384 128 -384 64
WIRE 560 128 560 0
WIRE 688 128 688 16
WIRE -256 160 -256 112
WIRE -144 240 -144 112
WIRE -96 240 -144 240
WIRE 16 240 -16 240
WIRE -256 288 -256 240
WIRE 416 320 416 304
WIRE 176 416 176 304
WIRE 416 416 416 384
WIRE 416 416 176 416
WIRE 176 448 176 416
FLAG 176 448 0
FLAG -368 -128 IN
FLAG 640 -128 OUT
FLAG -256 288 0
FLAG -384 128 0
FLAG 560 128 0
FLAG 688 128 0
SYMBOL cap 400 320 R0
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 544 -64 R0
SYMATTR InstName C2
SYMATTR Value 10µ
SYMBOL voltage -384 -32 R0
WINDOW 3 48 100 Right 2
WINDOW 123 0 0 Left 0
WINDOW 39 24 124 Left 2
SYMATTR Value 28
SYMATTR InstName V1
SYMBOL res 672 -80 R0
SYMATTR InstName R1
SYMATTR Value 2.8
SYMBOL nmos 400 -80 M270
WINDOW 0 107 89 VLeft 2
WINDOW 3 74 87 VLeft 2
SYMATTR InstName M1
SYMATTR Value BSC026N08NS5
SYMBOL LTC4373 256 176 R0
SYMATTR InstName U1
SYMBOL res -272 -80 R0
SYMATTR InstName R3
SYMATTR Value 3.83Meg
SYMBOL res -272 144 R0
SYMATTR InstName R4
SYMATTR Value 200K
SYMBOL res 0 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1.3Meg
SYMBOL nmos 80 -80 R270
WINDOW 0 103 33 VLeft 2
WINDOW 3 73 173 VLeft 2
SYMATTR InstName M2
SYMATTR Value BSC026N08NS5
SYMBOL res 144 -96 R0
SYMATTR InstName R2
SYMATTR Value 10
TEXT -280 392 Left 2 !.tran 1 startup
TEXT -360 -208 Left 2 ;UNDERVOLTAGE CUTOFF = 24V\nUNDERVOLTAGE RECOVERY = 28V