Version 4 SHEET 1 3528 2164 WIRE 1616 1200 1504 1200 WIRE 1712 1200 1616 1200 WIRE 1904 1200 1712 1200 WIRE 2144 1200 1904 1200 WIRE 2336 1200 2144 1200 WIRE 1504 1216 1504 1200 WIRE 1616 1216 1616 1200 WIRE 1712 1216 1712 1200 WIRE 2144 1216 2144 1200 WIRE 1904 1280 1904 1200 WIRE 1904 1280 1808 1280 WIRE 2000 1280 1904 1280 WIRE 2336 1280 2336 1200 WIRE 2336 1280 2288 1280 WIRE 2416 1280 2336 1280 WIRE 1808 1296 1808 1280 WIRE 2416 1296 2416 1280 WIRE 1504 1312 1504 1296 WIRE 1616 1312 1616 1280 WIRE 1712 1312 1712 1280 WIRE 1808 1376 1808 1360 WIRE 1904 1376 1904 1280 WIRE 2000 1376 1904 1376 WIRE 2336 1376 2336 1280 WIRE 2336 1376 2288 1376 WIRE 2416 1376 2416 1360 WIRE 1904 1472 1904 1456 WIRE 2000 1472 1904 1472 WIRE 2336 1472 2336 1456 WIRE 2336 1472 2288 1472 WIRE 1616 1568 1168 1568 WIRE 1728 1568 1616 1568 WIRE 1840 1568 1728 1568 WIRE 1904 1568 1840 1568 WIRE 2000 1568 1984 1568 WIRE 2320 1568 2288 1568 WIRE 2432 1568 2400 1568 WIRE 2512 1568 2432 1568 WIRE 2640 1568 2512 1568 WIRE 2784 1568 2640 1568 WIRE 1168 1584 1168 1568 WIRE 1616 1584 1616 1568 WIRE 1728 1584 1728 1568 WIRE 1840 1584 1840 1568 WIRE 2432 1584 2432 1568 WIRE 2512 1584 2512 1568 WIRE 2640 1584 2640 1568 WIRE 2784 1584 2784 1568 WIRE 2000 1664 1968 1664 WIRE 2320 1664 2288 1664 WIRE 1168 1680 1168 1664 WIRE 1616 1680 1616 1648 WIRE 1728 1680 1728 1664 WIRE 1840 1680 1840 1648 WIRE 1840 1680 1728 1680 WIRE 1968 1680 1968 1664 WIRE 1968 1680 1840 1680 WIRE 2320 1680 2320 1664 WIRE 2432 1680 2432 1648 WIRE 2432 1680 2320 1680 WIRE 2512 1680 2512 1664 WIRE 2512 1680 2432 1680 WIRE 2640 1680 2640 1648 WIRE 2784 1680 2784 1664 WIRE 1728 1696 1728 1680 WIRE 2512 1696 2512 1680 WIRE 2000 1760 1984 1760 WIRE 2304 1760 2288 1760 WIRE 1728 1792 1728 1776 WIRE 2512 1792 2512 1776 WIRE 2080 1840 2080 1824 WIRE 2208 1840 2208 1824 FLAG 2080 1840 0 FLAG 1504 1312 0 FLAG 2640 1680 0 FLAG 1504 1200 IN FLAG 2512 1792 0 FLAG 1728 1792 0 FLAG 1616 1680 0 FLAG 1168 1568 OUT1 FLAG 1168 1680 0 FLAG 1616 1312 0 FLAG 1808 1376 0 FLAG 2416 1376 0 FLAG 1712 1312 0 FLAG 2784 1680 0 FLAG 2784 1568 OUT2 FLAG 1984 1760 0 FLAG 2208 1840 0 FLAG 2304 1760 0 SYMBOL ind 2304 1584 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 4.7µ SYMATTR SpiceLine Rser=.0042 SYMBOL RES 2496 1568 R0 SYMATTR InstName R2 SYMATTR Value 475K SYMBOL VOLTAGE 1504 1200 R0 WINDOW 123 0 0 Left 2 SYMATTR SpiceLine Rser=0.01 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL cap 2624 1584 R0 SYMATTR InstName C2 SYMATTR Value 10µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL res 2496 1680 R0 WINDOW 0 35 46 Left 2 SYMATTR InstName R4 SYMATTR Value 105K SYMBOL current 2784 1584 R0 WINDOW 123 0 0 Left 2 WINDOW 39 44 35 Left 2 WINDOW 3 21 83 Left 2 SYMATTR SpiceLine load SYMATTR Value PULSE(.2 .6 .6m 5n 5n 100u 200u) SYMATTR InstName I2 SYMBOL cap 2416 1584 R0 SYMATTR InstName C4 SYMATTR Value 22p SYMBOL ind 2000 1584 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 2.2µ SYMATTR SpiceLine Rser=.0042 SYMBOL cap 1824 1584 R0 WINDOW 0 33 8 Left 2 WINDOW 3 30 56 Left 2 SYMATTR InstName C3 SYMATTR Value 22p SYMBOL res 1712 1680 R0 SYMATTR InstName R3 SYMATTR Value 75K SYMBOL cap 1600 1584 R0 SYMATTR InstName C1 SYMATTR Value 10µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL current 1168 1584 R0 WINDOW 123 0 0 Left 2 WINDOW 39 44 48 Left 2 WINDOW 3 22 85 Left 2 SYMATTR SpiceLine load SYMATTR Value PULSE(.2 .6 .6m 5n 5n 100u 200u) SYMATTR InstName I1 SYMBOL RES 1712 1568 R0 WINDOW 3 26 87 Left 2 SYMATTR Value 150K SYMATTR InstName R1 SYMBOL cap 1600 1216 R0 SYMATTR InstName C5 SYMATTR Value 10µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL LTC3607 2144 1520 R0 SYMATTR InstName U1 SYMBOL cap 1792 1296 R0 SYMATTR InstName C7 SYMATTR Value 0.1µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL cap 2400 1296 R0 SYMATTR InstName C8 SYMATTR Value 0.1µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL cap 1696 1216 R0 SYMATTR InstName C6 SYMATTR Value 10µ SYMATTR SpiceLine V=10 Irms=8.919 Rser=0.005 MTBF=0 Lser=0 mfg="KEMET" pn="C1210C106K8PAC" type="X5R" ppPkg=1 SYMBOL res 1888 1360 R0 SYMATTR InstName R5 SYMATTR Value 100K SYMBOL res 2320 1360 R0 SYMATTR InstName R6 SYMATTR Value 100K TEXT 2672 1792 Left 2 !.tran 1m startup TEXT 1512 1856 Left 2 ;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 © 2014 Linear Technology Inc. All rights reserved. TEXT 2144 1168 Bottom 2 ;LTC3607 - Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator\nDual 600mA 15V Monolithic Synchronous Buck Regulator\nInput: 4.5V to 15V Outputs: 1.8V @ 600mA & 3.3V @ 600mA, Fsw = 2.25MHz