Version 4
SHEET 1 1972 680
WIRE 928 -320 176 -320
WIRE 176 -240 176 -320
WIRE 176 -240 -448 -240
WIRE 256 -240 176 -240
WIRE 400 -240 336 -240
WIRE 432 -240 400 -240
WIRE 736 -240 528 -240
WIRE 832 -240 736 -240
WIRE 992 -240 832 -240
WIRE 1168 -240 992 -240
WIRE 992 -224 992 -240
WIRE 1168 -224 1168 -240
WIRE 512 -176 512 -192
WIRE -48 -160 -1056 -160
WIRE 48 -160 -48 -160
WIRE 176 -160 176 -240
WIRE 176 -160 144 -160
WIRE -1056 -144 -1056 -160
WIRE 992 -128 992 -160
WIRE 1168 -128 1168 -144
WIRE 832 -112 832 -240
WIRE -256 -96 -272 -96
WIRE -160 -96 -192 -96
WIRE -48 -96 -48 -160
WIRE -48 -96 -160 -96
WIRE 512 -64 512 -96
WIRE 528 -64 512 -64
WIRE 624 -64 608 -64
WIRE 704 -64 688 -64
WIRE -1056 -48 -1056 -64
WIRE 176 -48 176 -160
WIRE 288 -48 176 -48
WIRE 736 -16 736 -240
WIRE 736 -16 624 -16
WIRE 832 -16 832 -32
WIRE 832 -16 768 -16
WIRE -272 0 -272 -96
WIRE -160 0 -160 -96
WIRE -48 0 -48 -96
WIRE 64 0 64 -112
WIRE 176 0 176 -48
WIRE 288 0 288 -48
WIRE 400 0 400 -240
WIRE 512 0 512 -64
WIRE 624 0 624 -16
WIRE 832 0 832 -16
WIRE -448 48 -448 -240
WIRE 768 64 768 -16
WIRE 768 64 672 64
WIRE 832 96 832 80
WIRE 704 128 672 128
WIRE 928 128 928 -320
WIRE 928 128 784 128
WIRE -448 144 -448 128
WIRE -320 144 -448 144
WIRE -448 176 -448 144
WIRE 784 192 672 192
WIRE 928 192 928 128
WIRE 928 192 864 192
WIRE 704 256 672 256
WIRE 928 256 928 192
WIRE 928 256 784 256
WIRE -448 304 -448 256
WIRE -320 304 -448 304
WIRE -448 320 -448 304
WIRE 784 320 672 320
WIRE 928 320 928 256
WIRE 928 320 864 320
WIRE 688 384 672 384
WIRE -448 416 -448 400
WIRE -160 464 -160 448
WIRE -48 464 -48 448
WIRE 64 464 64 448
WIRE 176 464 176 448
WIRE 288 464 288 448
WIRE 288 464 176 464
WIRE 400 464 400 448
WIRE 400 464 288 464
WIRE 512 464 512 448
WIRE 176 480 176 464
WIRE 512 544 512 528
WIRE 176 560 176 544
FLAG -48 464 0
FLAG -448 416 0
FLAG 176 560 0
FLAG -1056 -48 0
FLAG 704 -64 0
FLAG 832 96 0
FLAG 992 -128 0
FLAG 1168 -240 OUT
FLAG 512 544 0
FLAG -1056 -160 IN
FLAG 1168 -128 0
FLAG -160 464 0
FLAG 64 464 0
FLAG 688 384 0
SYMBOL LTC4229 176 224 R0
SYMATTR InstName U1
SYMBOL res -464 32 R0
SYMATTR InstName R1
SYMATTR Value 21.5K
SYMBOL res -464 160 R0
SYMATTR InstName R2
SYMATTR Value 1.1K
SYMBOL res -464 304 R0
SYMATTR InstName R3
SYMATTR Value 2K
SYMBOL cap 160 480 R0
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL nmos 144 -112 M270
WINDOW 0 81 37 VTop 2
WINDOW 3 66 -21 VRight 2
SYMATTR InstName Q1
SYMATTR Value SiR818DP
SYMBOL nmos 432 -192 R270
WINDOW 0 79 44 VTop 2
WINDOW 3 47 42 VTop 2
SYMATTR InstName Q2
SYMATTR Value SiR818DP
SYMBOL res 352 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 2.5m
SYMBOL voltage -1056 -160 R0
WINDOW 3 54 59 Left 2
WINDOW 123 24 95 Left 2
SYMATTR Value PWL(0 0 .1m 12 200m 12
SYMATTR Value2 +100u 12 +100n 0 +100u 0 +100n 12)
SYMATTR InstName V1
SYMBOL cap -192 -112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value .1µ
SYMBOL res 496 -192 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 624 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 1K
SYMBOL cap 624 -48 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL res 816 -128 R0
SYMATTR InstName R7
SYMATTR Value 15K
SYMBOL res 816 -16 R0
SYMATTR InstName R8
SYMATTR Value 2K
SYMBOL cap 976 -224 R0
WINDOW 123 21 79 Left 2
WINDOW 3 29 56 Left 2
SYMATTR Value2 Rser=50m
SYMATTR Value 680µ
SYMATTR InstName C4
SYMBOL res 800 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 100K
SYMBOL res 880 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 100K
SYMBOL res 800 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 100K
SYMBOL res 880 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 100K
SYMBOL cap 496 464 R0
SYMATTR InstName C5
SYMATTR Value .1µ
SYMBOL res 1152 -240 R0
SYMATTR InstName Rload
SYMATTR Value 10
TEXT 744 472 Left 2 !.tran 0 200.5m 200m
TEXT 104 -328 Bottom 2 ;LTC4229 protects from Input Brownout