Version 4 SHEET 1 1668 1000 WIRE 32 -480 16 -480 WIRE 128 -480 112 -480 WIRE 144 -480 128 -480 WIRE 272 -480 224 -480 WIRE -480 -416 -560 -416 WIRE 224 -416 -480 -416 WIRE 896 -416 224 -416 WIRE 272 -400 272 -480 WIRE 272 -400 -288 -400 WIRE 320 -400 320 -432 WIRE 320 -400 272 -400 WIRE 752 -400 320 -400 WIRE -560 -384 -560 -416 WIRE -480 -384 -480 -416 WIRE -288 -384 -288 -400 WIRE 752 -384 752 -400 WIRE 896 -384 896 -416 WIRE 128 -368 128 -480 WIRE 224 -368 224 -416 WIRE 320 -368 320 -400 WIRE -192 -304 -432 -304 WIRE 848 -304 720 -304 WIRE -560 -288 -560 -304 WIRE -288 -208 -288 -320 WIRE -192 -208 -288 -208 WIRE 752 -208 752 -320 WIRE 752 -208 720 -208 WIRE -288 -192 -288 -208 WIRE 752 -192 752 -208 WIRE -832 -112 -944 -112 WIRE -800 -112 -832 -112 WIRE -736 -112 -800 -112 WIRE -640 -112 -656 -112 WIRE -576 -112 -640 -112 WIRE -480 -112 -480 -288 WIRE -480 -112 -576 -112 WIRE -288 -112 -288 -128 WIRE -288 -112 -480 -112 WIRE -192 -112 -288 -112 WIRE 752 -112 752 -128 WIRE 752 -112 720 -112 WIRE 896 -112 896 -288 WIRE 896 -112 752 -112 WIRE 1120 -112 896 -112 WIRE 1200 -112 1120 -112 WIRE 1216 -112 1200 -112 WIRE 1312 -112 1296 -112 WIRE 1408 -112 1312 -112 WIRE 1456 -112 1408 -112 WIRE 1568 -112 1456 -112 WIRE -944 -96 -944 -112 WIRE -480 -96 -480 -112 WIRE 896 -96 896 -112 WIRE 1456 -96 1456 -112 WIRE 1568 -96 1568 -112 WIRE -576 -64 -576 -112 WIRE 1120 -48 1120 -112 WIRE -192 -16 -432 -16 WIRE 848 -16 720 -16 WIRE -944 0 -944 -32 WIRE 1456 0 1456 -32 WIRE 1568 0 1568 -16 WIRE -480 32 -480 0 WIRE 896 32 896 0 WIRE -640 80 -640 -112 WIRE -576 80 -576 16 WIRE -272 80 -576 80 WIRE -192 80 -272 80 WIRE 800 80 720 80 WIRE 1120 80 1120 32 WIRE 1120 80 800 80 WIRE 1200 80 1200 -112 WIRE -272 96 -272 80 WIRE 800 96 800 80 WIRE -800 176 -800 -112 WIRE -272 176 -272 160 WIRE -272 176 -800 176 WIRE -192 176 -272 176 WIRE 800 176 800 160 WIRE 800 176 720 176 WIRE 1312 176 1312 -112 WIRE 1312 176 800 176 WIRE -272 192 -272 176 WIRE 800 192 800 176 WIRE -800 256 -800 176 WIRE 1312 256 1312 176 WIRE -640 272 -640 160 WIRE -272 272 -272 256 WIRE -272 272 -640 272 WIRE -192 272 -272 272 WIRE 800 272 800 256 WIRE 800 272 720 272 WIRE 1200 272 1200 160 WIRE 1200 272 800 272 WIRE -800 368 -800 336 WIRE -192 368 -800 368 WIRE 1312 368 1312 336 WIRE 1312 368 720 368 WIRE -800 384 -800 368 WIRE 1312 384 1312 368 WIRE -192 464 -208 464 WIRE 736 464 720 464 WIRE -800 480 -800 464 WIRE 1312 480 1312 464 WIRE -192 560 -208 560 WIRE 736 560 720 560 WIRE 848 560 736 560 WIRE 928 560 912 560 WIRE -304 656 -320 656 WIRE -224 656 -240 656 WIRE -192 656 -224 656 WIRE 752 656 720 656 WIRE 80 832 80 816 WIRE 272 832 272 816 WIRE 80 928 80 912 WIRE -208 960 -208 560 WIRE 736 960 736 560 WIRE 736 960 -208 960 WIRE -224 976 -224 656 WIRE 752 976 752 656 WIRE 752 976 -224 976 WIRE -832 992 -832 -112 WIRE 1408 992 1408 -112 WIRE 1408 992 -832 992 FLAG 272 832 0 FLAG -560 -288 0 FLAG 320 -496 0 FLAG -480 32 0 FLAG -208 464 0 FLAG -800 480 0 FLAG 928 560 0 FLAG -320 656 0 FLAG 896 32 0 FLAG 736 464 0 FLAG 1312 480 0 FLAG 80 928 0 FLAG -944 0 0 FLAG 1456 0 0 FLAG 1568 0 0 FLAG 1568 -112 OUT FLAG -560 -416 IN FLAG 16 -480 0 SYMBOL PowerProducts\\LTC3875 272 224 R0 SYMATTR InstName U1 SYMBOL voltage -560 -400 R0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL cap 304 -496 R0 SYMATTR InstName C1 SYMATTR Value 4.7µ SYMBOL nmos -432 -384 M0 WINDOW 0 38 -5 Right 2 WINDOW 3 33 106 Right 2 SYMATTR InstName M1 SYMATTR Value BSC050NE2LS SYMBOL nmos -432 -96 M0 WINDOW 0 -2 20 Right 2 WINDOW 3 36 109 Right 2 SYMATTR InstName M2 SYMATTR Value BSC010NE2LSI SYMBOL ind -640 -96 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value .3µ SYMATTR SpiceLine Rser=.32m SYMBOL cap -304 -192 R0 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL schottky -304 -384 R0 SYMATTR InstName D1 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap -288 96 R0 SYMATTR InstName C3 SYMATTR Value 220n SYMBOL cap -288 192 R0 SYMATTR InstName C4 SYMATTR Value 220n SYMBOL res -592 -80 R0 SYMATTR InstName R1 SYMATTR Value 845 SYMBOL res -656 64 R0 SYMATTR InstName R2 SYMATTR Value 4.22K SYMBOL res -816 240 R0 SYMATTR InstName R3 SYMATTR Value 20K SYMBOL res -816 368 R0 SYMATTR InstName R4 SYMATTR Value 20K SYMBOL cap 848 544 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 60 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1500p SYMATTR SpiceLine Rser=15K Cpar=200p SYMBOL cap -240 640 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .005µ SYMBOL nmos 848 -384 R0 WINDOW 0 52 10 Left 2 WINDOW 3 53 114 Left 2 SYMATTR InstName M3 SYMATTR Value BSC050NE2LS SYMBOL nmos 848 -96 R0 WINDOW 0 59 16 Left 2 WINDOW 3 60 103 Left 2 SYMATTR InstName M4 SYMATTR Value BSC010NE2LSI SYMBOL ind 1200 -96 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value .3µ SYMATTR SpiceLine Rser=.32m SYMBOL cap 736 -192 R0 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL schottky 736 -384 R0 SYMATTR InstName D2 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 784 96 R0 SYMATTR InstName C8 SYMATTR Value 220n SYMBOL cap 784 192 R0 SYMATTR InstName C9 SYMATTR Value 220n SYMBOL res 1104 -64 R0 SYMATTR InstName R5 SYMATTR Value 845 SYMBOL res 1184 64 R0 SYMATTR InstName R6 SYMATTR Value 4.22K SYMBOL res 1296 240 R0 SYMATTR InstName R7 SYMATTR Value 20K SYMBOL res 1296 368 R0 SYMATTR InstName R8 SYMATTR Value 20K SYMBOL res 64 816 R0 SYMATTR InstName R9 SYMATTR Value 122K SYMBOL polcap -960 -96 R0 WINDOW 3 37 39 Left 2 WINDOW 123 29 68 Left 2 SYMATTR Value 470µ SYMATTR Value2 x2 SYMATTR InstName C10 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=4 Irms=6.5 Rser=0.006 Lser=0 mfg="KEMET" pn="T530D477M004ASE006" type="Tantalum" SYMBOL polcap 1440 -96 R0 WINDOW 3 41 37 Left 2 WINDOW 123 28 64 Left 2 SYMATTR Value 470µ SYMATTR Value2 x2 SYMATTR InstName C11 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=4 Irms=6.5 Rser=0.006 Lser=0 mfg="KEMET" pn="T530D477M004ASE006" type="Tantalum" SYMBOL res 1552 -112 R0 SYMATTR InstName Rload SYMATTR Value 20m SYMBOL res 240 -496 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R10 SYMATTR Value 30K SYMBOL res 128 -496 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R11 SYMATTR Value 10K TEXT 1104 688 Left 2 !.tran 1.5m startup