Version 4 SHEET 1 1640 832 WIRE -768 -480 -1072 -480 WIRE 0 -480 -768 -480 WIRE 48 -480 0 -480 WIRE 144 -480 48 -480 WIRE 240 -480 144 -480 WIRE -1072 -464 -1072 -480 WIRE 48 -464 48 -480 WIRE 144 -464 144 -480 WIRE 240 -464 240 -480 WIRE -80 -448 -912 -448 WIRE -112 -416 -976 -416 WIRE -144 -384 -944 -384 WIRE 48 -368 48 -400 WIRE 144 -368 144 -400 WIRE 240 -368 240 -384 WIRE -1184 -352 -1280 -352 WIRE -640 -352 -1184 -352 WIRE -352 -352 -640 -352 WIRE -272 -352 -352 -352 WIRE -208 -352 -272 -352 WIRE 0 -352 0 -480 WIRE -352 -336 -352 -352 WIRE -208 -336 -208 -352 WIRE -1072 -320 -1072 -384 WIRE -1008 -320 -1072 -320 WIRE -1184 -288 -1184 -352 WIRE -768 -288 -768 -480 WIRE -640 -288 -640 -352 WIRE -512 -288 -512 -304 WIRE -1072 -272 -1072 -320 WIRE -80 -272 -80 -448 WIRE -48 -272 -80 -272 WIRE -272 -256 -272 -352 WIRE -208 -256 -208 -272 WIRE -1008 -240 -1008 -320 WIRE -880 -240 -1008 -240 WIRE -352 -240 -352 -256 WIRE -352 -240 -384 -240 WIRE -112 -224 -112 -416 WIRE 0 -224 0 -256 WIRE 0 -224 -112 -224 WIRE -1072 -192 -1072 -208 WIRE 272 -192 224 -192 WIRE 416 -192 272 -192 WIRE 464 -192 416 -192 WIRE 544 -192 464 -192 WIRE 608 -192 544 -192 WIRE 672 -192 608 -192 WIRE 800 -192 752 -192 WIRE 896 -192 800 -192 WIRE 464 -176 464 -192 WIRE 544 -176 544 -192 WIRE 608 -176 608 -192 WIRE 800 -176 800 -192 WIRE 896 -176 896 -192 WIRE -1184 -160 -1184 -224 WIRE -880 -160 -1184 -160 WIRE -272 -160 -272 -192 WIRE -272 -160 -384 -160 WIRE 224 -160 224 -192 WIRE 272 -160 272 -192 WIRE -1184 -112 -1184 -160 WIRE -912 -80 -912 -448 WIRE -880 -80 -912 -80 WIRE 176 -80 -384 -80 WIRE 464 -80 464 -112 WIRE 544 -80 544 -112 WIRE 608 -80 608 -112 WIRE 800 -80 800 -112 WIRE 896 -80 896 -96 WIRE 224 -64 -80 -64 WIRE 272 -64 272 -96 WIRE 272 -64 224 -64 WIRE 416 -32 416 -192 WIRE 0 -16 0 -224 WIRE 64 -16 0 -16 WIRE 224 -16 224 -64 WIRE 224 -16 144 -16 WIRE -1184 0 -1184 -48 WIRE -976 0 -976 -416 WIRE -976 0 -1184 0 WIRE -880 0 -976 0 WIRE -272 0 -272 -96 WIRE -272 0 -384 0 WIRE -80 0 -80 -64 WIRE -80 0 -272 0 WIRE 224 0 224 -16 WIRE -944 80 -944 -384 WIRE -880 80 -944 80 WIRE 176 80 -384 80 WIRE 0 96 0 -16 WIRE 48 96 0 96 WIRE 0 112 0 96 WIRE 48 112 48 96 WIRE -960 160 -976 160 WIRE -880 160 -896 160 WIRE -208 160 -384 160 WIRE 416 160 416 48 WIRE 416 160 320 160 WIRE 416 176 416 160 WIRE -144 192 -144 -384 WIRE -48 192 -144 192 WIRE 48 208 48 176 WIRE 48 208 0 208 WIRE 112 208 48 208 WIRE 224 208 224 96 WIRE 224 208 112 208 WIRE 64 224 -320 224 WIRE 112 224 112 208 WIRE 112 224 64 224 WIRE 160 224 112 224 WIRE -1184 240 -1232 240 WIRE -1072 240 -1104 240 WIRE -880 240 -1072 240 WIRE -352 240 -384 240 WIRE 64 240 64 224 WIRE 160 240 160 224 WIRE -1232 256 -1232 240 WIRE -1072 256 -1072 240 WIRE 416 272 416 256 WIRE -960 320 -976 320 WIRE -880 320 -896 320 WIRE -240 320 -384 320 WIRE -1232 336 -1232 320 WIRE -1072 336 -1072 320 WIRE 64 336 64 320 WIRE 64 336 -304 336 WIRE 112 336 64 336 WIRE 160 336 160 320 WIRE 160 336 112 336 WIRE 112 352 112 336 WIRE -208 384 -208 160 WIRE 320 384 320 160 WIRE 320 384 -208 384 WIRE -880 400 -912 400 WIRE -352 400 -352 240 WIRE -352 400 -384 400 WIRE -352 448 -352 400 WIRE -496 480 -496 464 WIRE -240 496 -240 320 WIRE -144 496 -240 496 WIRE -768 512 -768 464 WIRE -736 512 -768 512 WIRE -640 512 -640 464 WIRE -640 512 -672 512 WIRE -464 512 -640 512 WIRE -304 512 -304 336 WIRE -304 512 -384 512 WIRE -240 528 -240 496 WIRE -768 576 -768 512 WIRE -592 576 -768 576 WIRE -320 576 -320 224 WIRE -320 576 -512 576 WIRE -144 608 -144 496 WIRE -240 640 -240 608 WIRE -1280 752 -1280 -352 WIRE -240 752 -240 720 WIRE -240 752 -1280 752 WIRE -144 752 -144 672 WIRE -144 752 -240 752 FLAG 112 352 0 FLAG 896 -80 0 FLAG -1232 336 0 FLAG 896 -192 OUT FLAG 240 -480 IN FLAG 144 -368 0 FLAG -512 -304 0 FLAG -1072 -192 0 FLAG -496 480 0 FLAG -208 -256 0 FLAG -976 320 0 FLAG -912 400 0 FLAG 464 -80 0 FLAG 544 -80 0 FLAG -976 160 0 FLAG -1072 336 0 FLAG 416 272 0 FLAG 48 -368 0 FLAG 240 -368 0 FLAG -352 448 0 FLAG 608 -80 0 FLAG 800 -80 0 SYMBOL PowerProducts\\LTC3780 -640 80 R0 SYMATTR InstName U1 SYMBOL nmos -48 -352 R0 SYMATTR InstName Q1 SYMATTR Value SUD40N04-10A SYMBOL nmos -48 112 R0 WINDOW 3 46 100 Right 2 WINDOW 0 39 -3 Right 2 SYMATTR Value SUD40N04-10A SYMATTR InstName Q2 SYMBOL nmos 176 -160 R0 WINDOW 0 32 -21 Right 2 WINDOW 3 -6 57 Right 2 SYMATTR InstName Q3 SYMATTR Value SUD40N04-10A SYMBOL nmos 176 0 R0 SYMATTR InstName Q4 SYMATTR Value SUD40N04-10A SYMBOL ind 48 0 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 0.047m SYMATTR SpiceLine Rser=0.005 Rpar=2K SYMBOL res 48 224 R0 SYMATTR InstName R1 SYMATTR Value 0.020 SYMBOL res 144 224 R0 SYMATTR InstName R2 SYMATTR Value 0.020 SYMBOL cap 128 -464 R0 SYMATTR InstName C2 SYMATTR Value 22µ SYMATTR SpiceLine Rser=0.1 SYMBOL cap -224 -336 R0 SYMATTR InstName C3 SYMATTR Value 4.7µ SYMBOL cap -896 304 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value .001µ SYMBOL res -1088 224 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 100K SYMBOL cap -1248 256 R0 SYMATTR InstName C5 SYMATTR Value .01µ SYMBOL res -496 592 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 100 SYMBOL res -368 528 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 100 SYMBOL voltage 240 -480 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 24 44 Left 2 SYMATTR Value 30 SYMATTR InstName V1 SYMBOL res -1088 -480 R0 SYMATTR InstName R6 SYMATTR Value 47k SYMBOL res 400 -48 R0 SYMATTR InstName R7 SYMATTR Value 348k SYMBOL res 400 160 R0 SYMATTR InstName R8 SYMATTR Value 12k SYMBOL cap -288 -160 R0 WINDOW 0 32 12 Left 2 SYMATTR InstName C6 SYMATTR Value .22µ SYMBOL cap -1200 -112 R0 SYMATTR InstName C7 SYMATTR Value .22µ SYMBOL cap -896 144 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C8 SYMATTR Value .001µ SYMBOL res -368 -352 R0 SYMATTR InstName R9 SYMATTR Value 100K SYMBOL schottky 256 -96 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value MBRS340 SYMBOL schottky 32 176 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS340 SYMBOL cap 448 -176 R0 SYMATTR InstName C9 SYMATTR Value 40µ SYMATTR SpiceLine Rser=0.01 SYMBOL cap 32 -464 R0 SYMATTR InstName C10 SYMATTR Value 4.7µ SYMATTR SpiceLine Rser=0.01 SYMBOL cap -672 496 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C11 SYMATTR Value 100p SYMBOL cap -1088 256 R0 SYMATTR InstName C12 SYMATTR Value 100p SYMBOL zener -1088 -208 M180 WINDOW 0 27 62 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value 1N750 SYMBOL res 880 -192 R0 SYMATTR InstName Rload SYMATTR Value 50 SYMBOL schottky -288 -256 R0 SYMATTR InstName D4 SYMATTR Value 1N5819 SYMBOL schottky -1200 -288 R0 SYMATTR InstName D5 SYMATTR Value 1N5819 SYMBOL polcap 528 -176 R0 SYMATTR InstName C1 SYMATTR Value 390µ SYMATTR SpiceLine Rser=0.05 SYMBOL res -224 624 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R10 SYMATTR Value 220k SYMBOL cap 592 -176 R0 SYMATTR InstName C13 SYMATTR Value 10µ SYMBOL cap 784 -176 R0 SYMATTR InstName C14 SYMATTR Value 10µ SYMBOL ind 656 -176 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 0.01m SYMBOL cap -128 672 R180 WINDOW 0 23 58 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C15 SYMATTR Value 47p SYMBOL res -224 736 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R11 SYMATTR Value 27k TEXT 416 352 Left 2 !.tran 10m startup TEXT -288 -488 Bottom 2 ;LTC3780 Design - High Efficiency Buck-Boost DC/DC Converter\nInput: 18 to 35V Output: 24V @ 1A