Version 4 SHEET 1 1152 948 WIRE 160 -736 112 -736 WIRE 272 -736 224 -736 WIRE 336 -736 272 -736 WIRE 496 -736 336 -736 WIRE 272 -704 272 -736 WIRE 336 -704 336 -736 WIRE 112 -464 112 -736 WIRE 480 -464 112 -464 WIRE 576 -464 560 -464 WIRE 656 -464 576 -464 WIRE 752 -464 656 -464 WIRE 848 -464 832 -464 WIRE 576 -400 576 -464 WIRE 656 -400 656 -464 WIRE 848 -368 848 -400 WIRE 576 -288 576 -336 WIRE 656 -288 656 -320 WIRE -432 -96 -448 -96 WIRE -288 -96 -352 -96 WIRE -160 -96 -288 -96 WIRE 0 -96 -160 -96 WIRE 112 -96 112 -464 WIRE 112 -96 0 -96 WIRE 240 -96 112 -96 WIRE 320 -96 240 -96 WIRE 464 -96 400 -96 WIRE 528 -96 464 -96 WIRE 848 -96 624 -96 WIRE 864 -96 848 -96 WIRE -448 -32 -448 -96 WIRE -288 -32 -288 -96 WIRE -160 -32 -160 -96 WIRE 576 -16 576 -32 WIRE 576 -16 464 -16 WIRE 240 16 240 -96 WIRE 576 32 576 -16 WIRE 576 80 576 32 WIRE 864 80 864 -96 WIRE -448 96 -448 32 WIRE -288 96 -288 32 WIRE -160 96 -160 32 WIRE 432 96 240 96 WIRE 432 272 432 96 WIRE 576 320 576 144 WIRE 160 432 80 432 WIRE 240 432 160 432 WIRE 432 432 240 432 WIRE 848 432 528 432 WIRE 160 448 160 432 WIRE 240 448 240 432 WIRE 432 464 432 432 WIRE 528 464 528 432 WIRE 352 528 240 528 WIRE 656 528 608 528 WIRE 160 544 160 512 WIRE 240 544 240 528 WIRE 656 544 656 528 WIRE 240 624 240 608 WIRE 656 624 656 608 WIRE 656 624 608 624 WIRE 736 624 656 624 WIRE 848 624 848 432 WIRE 848 624 816 624 WIRE 944 624 848 624 WIRE 1040 624 944 624 WIRE 656 640 656 624 WIRE 944 640 944 624 WIRE 1040 640 1040 624 WIRE 848 704 848 624 WIRE 208 720 160 720 WIRE 352 720 288 720 WIRE 656 720 656 704 WIRE 656 720 608 720 WIRE 944 736 944 704 WIRE 1040 736 1040 720 WIRE 176 816 160 816 WIRE 256 816 240 816 WIRE 352 816 336 816 WIRE 848 816 848 784 WIRE 848 816 608 816 WIRE 848 832 848 816 WIRE 480 896 480 880 WIRE 848 928 848 912 FLAG -448 176 0 FLAG 240 176 0 FLAG 576 320 0 FLAG 864 160 0 FLAG 848 -96 Vprotect FLAG 576 32 Vctl FLAG -288 176 0 FLAG -160 176 0 FLAG 0 -96 V_Load_Dump FLAG 576 -288 0 FLAG 656 -288 0 FLAG 656 -464 V-Ain FLAG 848 -288 0 FLAG 944 736 0 FLAG 848 928 0 FLAG 160 816 0 FLAG 480 896 0 FLAG 1040 736 0 FLAG 160 720 0 FLAG 240 624 0 FLAG 1040 624 OUT FLAG 160 544 0 FLAG 272 -640 0 FLAG 336 -640 0 FLAG 496 -736 Vin_3v3 IOPIN 496 -736 BiDir SYMBOL voltage -448 80 R0 WINDOW 3 -99 161 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value EXP(0 202 5ms 10ms 0s 220ms) SYMATTR InstName V1 SYMBOL res 224 0 R0 SYMATTR InstName R1 SYMATTR Value 2K SYMBOL res 224 80 R0 SYMATTR InstName R2 SYMATTR Value 25K SYMBOL npn 528 -32 R270 SYMATTR InstName Q2 SYMATTR Value 2N3904 SYMBOL res 848 64 R0 SYMATTR InstName R3 SYMATTR Value 360R SYMBOL res 448 -112 R0 SYMATTR InstName R4 SYMATTR Value 1000 SYMBOL res 416 -112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 1R SYMBOL voltage -288 80 R0 WINDOW 3 40 80 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value 28.6 SYMATTR InstName V2 SYMBOL diode -272 32 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMBOL diode -432 32 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMBOL res -336 -112 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 2R SYMBOL diode -176 -32 R0 SYMATTR InstName D4 SYMBOL voltage -160 80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value 55.3 SYMBOL res 464 -448 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R7 SYMATTR Value 100K SYMBOL res 640 -416 R0 SYMATTR InstName R8 SYMATTR Value 8870R SYMBOL cap 560 -400 R0 SYMATTR InstName C1 SYMATTR Value 0.1µF SYMBOL res 736 -448 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R9 SYMATTR Value 1R SYMBOL voltage 848 -384 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V4 SYMATTR Value 5 SYMBOL diode 832 -464 R0 SYMATTR InstName D5 SYMBOL ind 720 640 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rpar=2K SYMBOL schottky 640 704 M180 WINDOW 0 28 62 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D6 SYMATTR Value 1N5819 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 928 640 R0 SYMATTR InstName C2 SYMATTR Value 10µ SYMBOL res 832 688 R0 SYMATTR InstName R10 SYMATTR Value 536K SYMATTR SpiceLine tol=1 pwr=0.1 SYMBOL res 832 816 R0 SYMATTR InstName R11 SYMATTR Value 38.3K SYMATTR SpiceLine tol=1 SYMBOL cap 640 544 R0 WINDOW 3 30 49 Left 2 SYMATTR Value .22µ SYMATTR InstName C3 SYMBOL cap 240 800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 470p SYMBOL res 352 800 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 16.2K SYMBOL res 304 704 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 16.9K SYMBOL res 224 432 R0 SYMATTR InstName R14 SYMATTR Value 100K SYMBOL cap 224 544 R0 SYMATTR InstName C5 SYMATTR Value 0.068µ SYMBOL LT3682 480 672 R0 SYMATTR InstName U1 SYMBOL res 1024 624 R0 SYMATTR InstName Rload1 SYMATTR Value 12 SYMATTR SpiceLine pwr=14w SYMBOL cap 144 448 R0 SYMATTR InstName C6 SYMATTR Value 2.2µ SYMBOL diode 160 -720 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D7 SYMBOL polcap 256 -704 R0 WINDOW 3 24 56 Left 2 SYMATTR Value 22µ SYMATTR InstName C7 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=63 Irms=170m Rser=1 Lser=0 mfg="Nichicon" pn="UPG1J220MPH" type="Al electrolytic" SYMBOL polcap 320 -704 R0 WINDOW 3 24 56 Left 2 SYMATTR Value 0.47µ SYMATTR InstName C8 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=50 Irms=22m Rser=3.9 Lser=0 mfg="Nichicon" pn="UPL1HR47MAH" type="Al electrolytic" SYMBOL UserLib\\Z-Diodes\ from\ DiodesInc\\Xzener_DiodesInc 592 144 R180 WINDOW 38 24 -21 Left 2 SYMATTR InstName U2 SYMATTR SpiceModel SMAZ27 TEXT -480 280 Left 2 !.tran .6s TEXT -504 -152 Left 2 ;This simulates a Load Dump on a 24v System TEXT 544 -552 Left 2 ;Analog Input intrinsic diode and\nsmall R for current measurement TEXT 480 408 Bottom 2 ;LT3682 - 1A µPower Step-Down Switching Regulator\nInput: 6.9V - 36V(Transients to 60V) Output: 5V @ 1A TEXT 136 752 Left 2 ;1MHz