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176 -1248 176 WIRE -1088 176 -1088 -112 WIRE -1088 176 -1120 176 WIRE -864 176 -896 176 WIRE 416 176 416 144 WIRE 416 176 96 176 WIRE 1728 176 1728 -464 WIRE 1728 176 416 176 WIRE -1584 224 -1584 -144 WIRE -1248 240 -1248 176 WIRE 592 240 592 -576 WIRE 624 240 592 240 WIRE 752 240 688 240 WIRE 800 240 752 240 WIRE 912 240 864 240 WIRE -864 272 -896 272 WIRE 128 272 96 272 WIRE 176 272 128 272 WIRE 176 288 176 272 WIRE 992 288 992 -832 WIRE -1376 304 -1536 304 WIRE -1088 304 -1088 176 WIRE -1088 304 -1120 304 WIRE -1040 304 -1088 304 WIRE 752 304 752 240 WIRE -1040 320 -1040 304 WIRE -896 368 -896 272 WIRE -864 368 -896 368 WIRE 128 368 128 272 WIRE 128 368 96 368 WIRE 592 368 592 240 WIRE 592 368 512 368 WIRE 624 368 592 368 WIRE 944 368 880 368 WIRE -2048 384 -2048 -576 WIRE -2048 384 -2160 384 WIRE -2016 384 -2048 384 WIRE -1984 384 -2016 384 WIRE -1872 384 -1904 384 WIRE -1584 384 -1584 320 WIRE -1584 384 -1872 384 WIRE -1408 384 -1408 176 WIRE -1408 384 -1584 384 WIRE -1376 384 -1408 384 WIRE -1088 384 -1088 304 WIRE -1088 384 -1120 384 WIRE 176 384 176 352 WIRE 512 384 512 368 WIRE -2160 400 -2160 384 WIRE -1040 400 -1040 384 WIRE -896 400 -896 368 WIRE 128 400 128 368 WIRE 128 400 -896 400 WIRE -1584 416 -1584 384 WIRE -1872 448 -1872 384 WIRE 592 448 592 368 WIRE 624 448 592 448 WIRE 912 448 912 240 WIRE 912 448 880 448 WIRE 992 448 992 384 WIRE 992 448 912 448 WIRE 1280 448 992 448 WIRE 1312 448 1280 448 WIRE 1424 448 1392 448 WIRE 1504 448 1504 -576 WIRE 1504 448 1424 448 WIRE 1600 448 1504 448 WIRE -1376 464 -1456 464 WIRE -864 464 -1120 464 WIRE 352 464 96 464 WIRE 512 464 512 448 WIRE 992 464 992 448 WIRE 1600 464 1600 448 WIRE -2160 480 -2160 464 WIRE -1456 496 -1456 464 WIRE -1456 496 -1536 496 WIRE 1280 496 1280 448 WIRE 352 528 352 464 WIRE 624 528 352 528 WIRE 928 528 880 528 WIRE -1584 544 -1584 512 WIRE -1248 544 -1248 528 WIRE 928 544 928 528 WIRE 944 544 928 544 WIRE -928 560 -1152 560 WIRE -864 560 -928 560 WIRE 128 560 96 560 WIRE 416 560 128 560 WIRE 1600 560 1600 528 WIRE -928 576 -928 560 WIRE 128 576 128 560 WIRE 992 576 992 560 WIRE 752 608 752 592 WIRE -1872 624 -1872 528 WIRE -1152 624 -1152 560 WIRE -1152 624 -1872 624 WIRE -2016 656 -2016 384 WIRE -928 656 -928 640 WIRE -928 656 -2016 656 WIRE -864 656 -928 656 WIRE 128 656 128 640 WIRE 128 656 96 656 WIRE 352 656 128 656 WIRE 416 720 416 560 WIRE 1280 720 1280 576 WIRE 1280 720 416 720 WIRE -960 752 -960 -208 WIRE -864 752 -960 752 WIRE 128 752 96 752 WIRE 352 752 352 656 WIRE 1424 752 1424 448 WIRE 1424 752 352 752 WIRE -960 784 -960 752 WIRE 128 784 128 752 WIRE 128 784 -960 784 WIRE -1088 848 -1088 384 WIRE -864 848 -1088 848 WIRE 592 848 592 448 WIRE 592 848 96 848 WIRE -976 944 -976 16 WIRE -864 944 -976 944 WIRE 128 944 96 944 WIRE -976 992 -976 944 WIRE 128 992 128 944 WIRE 128 992 -976 992 WIRE -864 1136 -880 1136 WIRE 128 1136 96 1136 WIRE -384 1312 -384 1296 WIRE -768 1344 -768 1296 WIRE -672 1344 -672 1296 WIRE -672 1344 -768 1344 WIRE -96 1344 -96 1296 WIRE -96 1344 -672 1344 WIRE 0 1344 0 1296 WIRE 0 1344 -96 1344 WIRE -576 1360 -576 1296 WIRE -480 1360 -480 1296 WIRE -480 1360 -576 1360 WIRE -288 1360 -288 1296 WIRE -288 1360 -480 1360 WIRE -192 1360 -192 1296 WIRE -192 1360 -288 1360 WIRE -192 1376 -192 1360 WIRE -192 1472 -192 1456 WIRE -2048 1520 -2048 384 WIRE 1504 1520 1504 448 WIRE 1504 1520 -2048 1520 FLAG 240 -592 0 FLAG 352 -672 0 FLAG 752 -416 0 FLAG 1072 -448 0 FLAG 1568 -448 0 FLAG 1952 -448 0 FLAG 176 384 0 FLAG -1248 -416 0 FLAG -1728 -448 0 FLAG -1248 544 0 FLAG -1584 544 0 FLAG 752 608 0 FLAG 992 576 0 FLAG -192 1472 0 FLAG -384 1312 0 FLAG -2160 -720 0 FLAG -2160 -832 IN FLAG 496 -560 0 FLAG 512 464 0 FLAG -1040 -560 0 FLAG -1040 400 0 FLAG 1600 560 0 FLAG -2160 480 0 FLAG -2160 -480 0 FLAG 1792 -448 0 FLAG -320 -704 0 FLAG -1824 -736 0 FLAG 1184 -736 0 FLAG -1936 -736 0 FLAG 1952 -576 OUT FLAG 128 1136 0 FLAG -880 1136 0 FLAG -896 176 0 SYMBOL PowerProducts\\LTC7851 -384 320 R0 SYMATTR InstName U1 SYMBOL res 224 -608 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 30.9K SYMBOL voltage 352 -784 R0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL PowerProducts\\LTC4449 752 -576 R0 SYMATTR InstName U2 SYMBOL schottky 624 -768 R270 WINDOW 3 -4 37 VBottom 2 WINDOW 0 32 32 VTop 2 SYMATTR Value CMDSH2-3 SYMATTR InstName D1 SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos 1024 -736 R0 SYMATTR InstName M1 SYMATTR Value BSC050NE2LS SYMBOL nmos 1024 -560 R0 SYMATTR InstName M2 SYMATTR Value BSC010NE2LSI SYMBOL cap 864 -800 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value .22µ SYMBOL ind 1296 -560 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 250n SYMATTR Value2 Rser=.3m SYMATTR SpiceLine Ipk=40 Rser=0.00032 Rpar=45.7 Cpar=1.13p mfg="Würth Elektronik" pn="744301025 WE-HCM 1190" SYMBOL cap 1552 -544 R0 WINDOW 123 27 59 Left 2 WINDOW 3 40 34 Left 2 SYMATTR Value2 x2 SYMATTR Value 100µ SYMATTR InstName CoCer1 SYMATTR SpiceLine V=6.3 Irms=18.1 Rser=0.00224198 Lser=0 mfg="KEMET" pn="C1206C107K9PAC" type="X5R" SYMBOL res 1936 -576 R0 SYMATTR InstName R3 SYMATTR Value 10m SYMBOL res 400 48 R0 SYMATTR InstName R5 SYMATTR Value 10K SYMBOL cap 160 352 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C5 SYMATTR Value 100p SYMBOL PowerProducts\\LTC4449 -1248 -576 M0 SYMATTR InstName U3 SYMBOL schottky -1120 -768 M270 WINDOW 3 -4 37 VBottom 2 WINDOW 0 32 32 VTop 2 SYMATTR Value CMDSH2-3 SYMATTR InstName D2 SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos -1680 -736 M0 WINDOW 0 31 -3 Right 2 WINDOW 3 32 100 Right 2 SYMATTR InstName M3 SYMATTR Value BSC050NE2LS SYMBOL nmos -1680 -560 M0 WINDOW 0 -4 20 Right 2 WINDOW 3 27 104 Right 2 SYMATTR InstName M4 SYMATTR Value BSC010NE2LSI SYMBOL cap -1360 -800 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .1µ SYMBOL PowerProducts\\LTC4449 -1248 384 M0 SYMATTR InstName U4 SYMBOL schottky -1120 192 M270 WINDOW 3 -4 37 VBottom 2 WINDOW 0 32 32 VTop 2 SYMATTR Value CMDSH2-3 SYMATTR InstName D3 SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos -1536 224 M0 WINDOW 0 32 -3 Right 2 WINDOW 3 34 102 Right 2 SYMATTR InstName M5 SYMATTR Value BSC050NE2LS SYMBOL nmos -1536 416 M0 WINDOW 0 37 -2 Right 2 WINDOW 3 34 99 Right 2 SYMATTR InstName M6 SYMATTR Value BSC010NE2LSI SYMBOL cap -1360 160 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C8 SYMATTR Value .1µ SYMBOL PowerProducts\\LTC4449 752 448 R0 SYMATTR InstName U5 SYMBOL schottky 624 256 R270 WINDOW 3 -4 37 VBottom 2 WINDOW 0 32 32 VTop 2 SYMATTR Value CMDSH2-3 SYMATTR InstName D4 SYMATTR Description Diode SYMATTR Type diode SYMBOL nmos 944 288 R0 SYMATTR InstName M7 SYMATTR Value BSC050NE2LS SYMBOL nmos 944 464 R0 SYMATTR InstName M8 SYMATTR Value BSC010NE2LSI SYMBOL cap 864 224 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C10 SYMATTR Value .1µ SYMBOL res -208 1360 R0 SYMATTR InstName R8 SYMATTR Value 43.2K SYMBOL voltage -2160 -832 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 12 SYMBOL cap 112 -384 R0 SYMATTR InstName C12 SYMATTR Value .22µ SYMBOL cap 112 576 R0 SYMATTR InstName C13 SYMATTR Value .22µ SYMBOL cap -960 -384 R0 SYMATTR InstName C14 SYMATTR Value .22µ SYMBOL res -1888 544 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R10 SYMATTR Value 3.57K SYMBOL cap -944 576 R0 SYMATTR InstName C7 SYMATTR Value .22µ SYMBOL res 1264 592 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 3.57K SYMBOL res 1264 -432 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R11 SYMATTR Value 3.57K SYMBOL res -1856 -352 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R2 SYMATTR Value 3.57K SYMBOL res 176 -112 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL res 352 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 28 58 VTop 2 SYMATTR InstName R7 SYMATTR Value 332 SYMBOL cap 384 -96 R0 SYMATTR InstName C3 SYMATTR Value 3.3n SYMBOL cap 176 -192 R0 SYMATTR InstName C4 SYMATTR Value 220p SYMBOL res 352 -224 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R13 SYMATTR Value 4.12K SYMBOL cap 384 -192 R0 SYMATTR InstName C9 SYMATTR Value 2.2n SYMBOL res 576 16 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 10K SYMBOL cap 480 -640 R0 SYMATTR InstName C11 SYMATTR Value 4.7µ SYMBOL cap 496 384 R0 SYMATTR InstName C15 SYMATTR Value 4.7µ SYMBOL cap -1056 -640 R0 SYMATTR InstName C16 SYMATTR Value 4.7µ SYMBOL cap -1056 320 R0 SYMATTR InstName C17 SYMATTR Value 4.7µ SYMBOL ind 1296 464 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 250n SYMATTR Value2 Rser=.3m SYMATTR SpiceLine Ipk=40 Rser=0.00032 Rpar=45.7 Cpar=1.13p mfg="Würth Elektronik" pn="744301025 WE-HCM 1190" SYMBOL ind -1888 400 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L4 SYMATTR Value 250n SYMATTR Value2 Rser=.3m SYMATTR SpiceLine Ipk=40 Rser=0.00032 Rpar=45.7 Cpar=1.13p mfg="Würth Elektronik" pn="744301025 WE-HCM 1190" SYMBOL ind -1856 -560 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L3 SYMATTR Value 250n SYMATTR Value2 Rser=.3m SYMATTR SpiceLine Ipk=40 Rser=0.00032 Rpar=45.7 Cpar=1.13p mfg="Würth Elektronik" pn="744301025 WE-HCM 1190" SYMBOL polcap 1776 -544 R0 WINDOW 123 31 63 Left 2 WINDOW 3 38 35 Left 2 SYMATTR Value2 x12 SYMATTR Value 330µ SYMATTR InstName CoBlk SYMATTR SpiceLine V=2.5 Irms=4.55826 Rser=0.009 Lser=0 mfg="KEMET" pn="T520V337M2R5ATE009" type="Tantalum" SYMBOL cap 1584 464 R0 WINDOW 123 31 57 Left 2 WINDOW 3 41 32 Left 2 SYMATTR Value2 x2 SYMATTR Value 100µ SYMATTR InstName CoCer2 SYMATTR SpiceLine V=6.3 Irms=18.1 Rser=0.00224198 Lser=0 mfg="KEMET" pn="C1206C107K9PAC" type="X5R" SYMBOL cap -2176 400 R0 WINDOW 123 29 56 Left 2 WINDOW 3 42 35 Left 2 SYMATTR Value2 x2 SYMATTR Value 100µ SYMATTR InstName CoCer4 SYMATTR SpiceLine V=6.3 Irms=18.1 Rser=0.00224198 Lser=0 mfg="KEMET" pn="C1206C107K9PAC" type="X5R" SYMBOL cap -2176 -560 R0 WINDOW 123 30 65 Left 2 WINDOW 3 40 37 Left 2 SYMATTR Value2 x2 SYMATTR Value 100µ SYMATTR InstName CoCer3 SYMATTR SpiceLine V=6.3 Irms=18.1 Rser=0.00224198 Lser=0 mfg="KEMET" pn="C1206C107K9PAC" type="X5R" SYMBOL cap -336 -768 R0 WINDOW 0 46 22 Left 2 WINDOW 3 43 49 Left 2 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL cap -1840 -816 R0 WINDOW 123 25 57 Left 2 WINDOW 3 43 32 Left 2 SYMATTR Value2 x4 SYMATTR Value 22µ SYMATTR InstName C18 SYMATTR SpiceLine V=25 Irms=0 Rser=0.003 Lser=0 mfg="TDK" pn="C575OX5RIE226M" type="X5R" SYMBOL cap 1168 -816 R0 WINDOW 123 29 60 Left 2 WINDOW 3 45 28 Left 2 SYMATTR Value2 x4 SYMATTR Value 22µ SYMATTR InstName C19 SYMATTR SpiceLine V=25 Irms=0 Rser=0.003 Lser=0 mfg="TDK" pn="C575OX5RIE226M" type="X5R" SYMBOL polcap -1952 -816 R0 WINDOW 123 30 61 Left 2 WINDOW 3 36 35 Left 2 SYMATTR Value2 x2 SYMATTR Value 180µ SYMATTR InstName C20 SYMATTR SpiceLine Rser=30m TEXT 1160 1424 Left 2 !.tran 1m startup TEXT -328 -856 Bottom 4 ;LTC7851 - Quad Output, Multiphase Step-Down Voltage Mode DC/DC Controller with Accurate Current Sharing\nLTC4449 - High Speed Synchronous N-Channel MOSFET Driver\n4-Phase Converter with Discrete Gate Drivers and MOSFETs\nInput: 7V to 14V Outputs: 1.2V @ 120A, Fswitch = 400kHz TEXT 2000 -608 Bottom 2 ;1.2V/120A TEXT -1280 1560 Left 4 ;Note:\n More output capacitors may be needed to meet load step and output voltage requirements.\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 ADI parts.\n Copyright © 2018 Analog Devices Inc. All rights reserved.