Version 4 SHEET 1 3456 2212 WIRE 1184 1664 1184 1648 WIRE 1184 1760 1184 1728 WIRE 1200 1264 1200 1232 WIRE 1200 1376 1200 1344 WIRE 1232 1648 1184 1648 WIRE 1312 1232 1200 1232 WIRE 1312 1264 1312 1232 WIRE 1312 1376 1312 1328 WIRE 1344 1648 1312 1648 WIRE 1344 1664 1344 1648 WIRE 1344 1760 1344 1728 WIRE 1408 1232 1312 1232 WIRE 1408 1424 1408 1232 WIRE 1408 1440 1408 1424 WIRE 1408 1536 1408 1520 WIRE 1440 1760 1424 1760 WIRE 1456 1376 1456 1344 WIRE 1472 1344 1456 1344 WIRE 1552 1424 1408 1424 WIRE 1552 1536 1408 1536 WIRE 1552 1648 1344 1648 WIRE 1552 1760 1520 1760 WIRE 1664 1232 1408 1232 WIRE 1664 1248 1664 1232 WIRE 1664 1344 1536 1344 WIRE 1664 1344 1664 1328 WIRE 1664 1360 1664 1344 WIRE 1664 1824 1664 1808 WIRE 1792 1232 1664 1232 WIRE 1792 1360 1792 1232 WIRE 1792 1824 1792 1808 WIRE 1920 1232 1792 1232 WIRE 1920 1280 1920 1232 WIRE 1920 1424 1904 1424 WIRE 1920 1424 1920 1360 WIRE 2000 1232 1920 1232 WIRE 2000 1760 1904 1760 WIRE 2000 1760 2000 1232 WIRE 2032 1536 1904 1536 WIRE 2144 1536 2112 1536 WIRE 2144 1552 2144 1536 WIRE 2144 1648 1904 1648 WIRE 2144 1648 2144 1616 WIRE 2256 1536 2144 1536 WIRE 2256 1552 2256 1536 WIRE 2256 1648 2144 1648 WIRE 2256 1648 2256 1632 WIRE 2256 1664 2256 1648 WIRE 2256 1760 2256 1744 WIRE 2384 1536 2256 1536 WIRE 2384 1616 2384 1536 WIRE 2384 1760 2384 1680 WIRE 2496 1536 2384 1536 WIRE 2496 1600 2496 1536 WIRE 2496 1760 2496 1680 FLAG 1184 1760 0 FLAG 1200 1376 0 FLAG 2256 1760 0 FLAG 2384 1760 0 FLAG 2496 1536 OUT FLAG 1424 1760 0 FLAG 1408 1600 0 FLAG 1312 1376 0 FLAG 1344 1760 0 FLAG 1456 1376 0 FLAG 2496 1760 0 FLAG 1200 1232 IN FLAG 1664 1824 0 FLAG 1792 1824 0 SYMBOL ind 2016 1552 R270 WINDOW 0 32 56 VTop 0 WINDOW 3 5 56 VBottom 0 SYMATTR InstName L1 SYMATTR Value .2µ SYMATTR SpiceLine Ipk=17 Rser=.0042 SYMBOL RES 2240 1536 R0 SYMATTR InstName R1 SYMATTR Value 2.55K SYMBOL VOLTAGE 1200 1248 R0 SYMATTR InstName V1 SYMATTR Value 3.3 SYMBOL cap 2368 1616 R0 WINDOW 40 24 92 Left 0 SYMATTR SpiceLine2 x3 SYMATTR InstName C1 SYMATTR Value 100µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL res 2240 1648 R0 SYMATTR InstName R2 SYMATTR Value 2K SYMBOL cap 2128 1552 R0 SYMATTR InstName C2 SYMATTR Value 1000p SYMBOL PowerProducts\\LTC3418 1728 1584 R0 SYMATTR InstName U1 SYMBOL cap 1168 1664 R0 SYMATTR InstName C3 SYMATTR Value 1000p SYMBOL RES 1328 1632 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 4.99K SYMBOL cap 1392 1536 R0 WINDOW 0 25 12 Left 0 WINDOW 3 25 51 Left 0 SYMATTR InstName C4 SYMATTR Value 1000p SYMBOL RES 1392 1424 R0 SYMATTR InstName R4 SYMATTR Value 2.2Meg SYMBOL RES 1536 1744 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R5 SYMATTR Value 69.8K SYMBOL cap 1328 1664 R0 SYMATTR InstName C5 SYMATTR Value 47p SYMBOL cap 1296 1264 R0 WINDOW 3 25 54 Left 0 WINDOW 40 33 79 Left 0 SYMATTR Value 100µ SYMATTR SpiceLine2 x5 SYMATTR InstName C6 SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL RES 1648 1232 R0 SYMATTR InstName R6 SYMATTR Value 100 SYMBOL cap 1536 1360 M270 WINDOW 0 32 32 VTop 0 WINDOW 3 0 32 VBottom 0 SYMATTR InstName C7 SYMATTR Value 1µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL res 1904 1264 R0 SYMATTR InstName R7 SYMATTR Value 100K SYMBOL load2 2496 1600 R0 WINDOW 123 0 0 Left 0 WINDOW 39 25 112 Left 0 SYMATTR SpiceLine load SYMATTR InstName I1 SYMATTR Value 8 TEXT 1992 1808 Left 0 !.tran 1.75m startup TEXT 1160 1840 Left 0 ;Note:\n If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n Component substitution and printed circuit board layout may significantly affect circuit performance or reliability\n Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts\n Copyright © 2006 Linear Technology Inc. All rights reserved. TEXT 1720 1184 Center 0 ;LTC3418 - 8A, 4MHz, Monolithic Synchronous Step-down Regulator\nInput: 3.3V Output: 1.8V @ 8A