Version 4 SHEET 1 2932 1948 WIRE -176 -96 -272 -96 WIRE -96 -96 -176 -96 WIRE -32 -96 -96 -96 WIRE 256 -96 -32 -96 WIRE 992 -96 256 -96 WIRE 1248 -96 1216 -96 WIRE 1360 -96 1328 -96 WIRE 1504 -96 1504 -128 WIRE 1504 -96 1360 -96 WIRE -272 -80 -272 -96 WIRE -176 -80 -176 -96 WIRE -32 -80 -32 -96 WIRE 1360 -80 1360 -96 WIRE 1504 -80 1504 -96 WIRE 256 -48 256 -96 WIRE 112 0 -32 0 WIRE 640 0 400 0 WIRE 720 0 640 0 WIRE 880 0 816 0 WIRE 992 0 880 0 WIRE 1360 0 1216 0 WIRE -272 16 -272 0 WIRE -176 16 -176 -16 WIRE -32 16 -32 0 WIRE 640 16 640 0 WIRE 880 16 880 0 WIRE 1360 16 1360 0 WIRE 768 80 768 64 WIRE 112 96 96 96 WIRE 592 96 400 96 WIRE -32 112 -32 96 WIRE 640 112 640 80 WIRE 1728 128 1728 96 WIRE 768 176 768 160 WIRE 432 192 400 192 WIRE 880 192 880 96 WIRE 896 192 880 192 WIRE 992 192 976 192 WIRE 1264 192 1216 192 WIRE 1360 192 1360 96 WIRE 1360 192 1264 192 WIRE 1504 192 1504 -16 WIRE 1504 192 1360 192 WIRE 1552 192 1504 192 WIRE 1680 192 1632 192 WIRE 1824 192 1776 192 WIRE 432 208 432 192 WIRE 880 256 880 192 WIRE 1264 256 1264 192 WIRE 1264 256 880 256 WIRE 32 288 16 288 WIRE 112 288 96 288 WIRE 432 288 432 272 WIRE 432 288 400 288 WIRE 480 288 432 288 WIRE 592 288 592 96 WIRE 592 288 560 288 WIRE 672 288 592 288 WIRE 784 288 672 288 WIRE 896 288 784 288 WIRE 1200 288 896 288 WIRE 672 304 672 288 WIRE 784 304 784 288 WIRE 1200 320 1200 288 WIRE 16 384 0 384 WIRE 112 384 96 384 WIRE 432 384 400 384 WIRE 944 384 928 384 WIRE 1072 384 1024 384 WIRE 1440 384 1328 384 WIRE 1552 384 1440 384 WIRE 1648 384 1552 384 WIRE 1712 384 1648 384 WIRE 1824 384 1824 192 WIRE 1824 384 1792 384 WIRE 1872 384 1824 384 WIRE 1968 384 1872 384 WIRE 672 400 672 368 WIRE 784 400 784 368 WIRE 1440 400 1440 384 WIRE 1552 400 1552 384 WIRE 1648 400 1648 384 WIRE 1872 400 1872 384 WIRE 1968 400 1968 384 WIRE 432 432 432 384 WIRE 480 432 432 432 WIRE 592 432 592 288 WIRE 592 432 544 432 WIRE 752 432 592 432 WIRE 192 448 192 432 WIRE 320 448 320 432 WIRE 592 464 592 432 WIRE 752 464 752 432 WIRE 944 480 928 480 WIRE 1056 480 1024 480 WIRE 1072 480 1056 480 WIRE 1440 480 1328 480 WIRE 1552 496 1552 464 WIRE 1648 496 1648 480 WIRE 1872 496 1872 464 WIRE 1968 496 1968 480 WIRE 1200 560 1200 544 WIRE 1472 560 1200 560 WIRE -96 576 -96 -96 WIRE 112 576 -96 576 WIRE 592 576 592 544 WIRE 896 592 896 288 WIRE 1200 592 896 592 WIRE -96 608 -96 576 WIRE 112 608 112 576 WIRE 752 624 752 544 WIRE 752 624 656 624 WIRE 1200 624 1200 592 WIRE 752 672 752 624 WIRE 944 688 928 688 WIRE 1072 688 1024 688 WIRE 1536 688 1328 688 WIRE 1648 688 1536 688 WIRE 1712 688 1648 688 WIRE 1824 688 1824 384 WIRE 1824 688 1792 688 WIRE -96 704 -96 672 WIRE 432 704 432 432 WIRE 592 704 592 672 WIRE 592 704 432 704 WIRE 1536 704 1536 688 WIRE 1648 704 1648 688 WIRE 592 720 592 704 WIRE 944 784 928 784 WIRE 1056 784 1056 480 WIRE 1056 784 1024 784 WIRE 1072 784 1056 784 WIRE 1440 784 1440 480 WIRE 1440 784 1328 784 WIRE 1536 800 1536 768 WIRE 1648 800 1648 784 WIRE 592 816 592 800 WIRE 192 864 192 832 WIRE 272 864 192 864 WIRE 432 864 352 864 WIRE 592 864 432 864 WIRE 1200 864 1200 848 WIRE 1200 864 592 864 WIRE 1472 864 1472 560 WIRE 1472 864 1200 864 WIRE 1680 864 1472 864 WIRE 1824 864 1824 688 WIRE 1824 864 1744 864 WIRE 432 880 432 864 WIRE 592 880 592 864 WIRE 1200 880 1200 864 WIRE 1472 880 1472 864 WIRE 48 976 48 832 WIRE 432 976 432 960 WIRE 432 976 48 976 WIRE 592 976 592 960 WIRE 592 976 432 976 WIRE 1200 976 1200 960 WIRE 1472 976 1472 944 WIRE 752 1024 752 752 WIRE 1824 1024 1824 864 WIRE 1824 1024 752 1024 FLAG 192 448 0 FLAG 320 448 0 FLAG 0 384 0 FLAG 16 288 0 FLAG -272 16 0 FLAG 640 112 0 FLAG 784 400 0 FLAG -272 -96 IN FLAG 96 96 0 FLAG -32 112 0 FLAG -176 16 0 FLAG 672 400 0 FLAG 928 384 0 FLAG 928 480 0 FLAG 1968 384 OUT FLAG 1968 496 0 FLAG 928 688 0 FLAG 928 784 0 FLAG 1200 976 0 FLAG 1552 496 0 FLAG 1872 496 0 FLAG 1536 800 0 FLAG 1648 800 0 FLAG 592 816 0 FLAG 1472 976 0 FLAG 768 176 0 FLAG 1504 -128 0 FLAG 1728 96 0 FLAG 1648 496 0 FLAG -96 704 0 SYMBOL res 112 368 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 60.4K SYMBOL cap 96 272 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value .01µ SYMBOL voltage -272 -96 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 25 SYMBOL cap 624 16 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL ind 464 304 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 5.5µ SYMATTR SpiceLine Ipk=9.5 Rser=0.0103 Rpar=2100 Cpar=3.89p mfg="Wurth Elektronik" pn="744325550 WE-HCI 1050" SYMBOL cap 416 208 R0 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL cap 768 304 R0 WINDOW 3 38 34 Left 2 WINDOW 123 24 60 Left 2 SYMATTR Value 10µ SYMATTR Value2 x5 SYMATTR InstName C4 SYMATTR SpiceLine Rser=0.005 SYMBOL cap 544 416 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 1n SYMBOL LT8612 256 192 R0 SYMATTR InstName U1 SYMBOL res -48 0 R0 SYMATTR InstName R2 SYMATTR Value 54.6K SYMBOL res -48 -96 R0 SYMATTR InstName R3 SYMATTR Value 499K SYMBOL cap -192 -80 R0 SYMATTR InstName C6 SYMATTR Value 10µ SYMBOL cap 656 304 R0 SYMATTR InstName C7 SYMATTR Value 100µ SYMATTR SpiceLine Rser=0.005 SYMBOL res 1040 368 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL LT3081 1200 432 R0 SYMATTR InstName U2 SYMBOL res 1040 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 1K SYMBOL res 1424 384 R0 SYMATTR InstName R6 SYMATTR Value 104K SYMBOL res 1040 672 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 10K SYMBOL LT3081 1200 736 R0 SYMATTR InstName U3 SYMBOL res 1040 768 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R8 SYMATTR Value 1K SYMBOL res 1184 864 R0 SYMATTR InstName R9 SYMATTR Value 5.1K SYMBOL cap 1536 400 R0 WINDOW 3 38 34 Left 2 WINDOW 123 24 60 Left 2 SYMATTR Value 10µ SYMATTR Value2 x3 SYMATTR InstName C8 SYMATTR SpiceLine Rser=0.005 SYMBOL cap 1856 400 R0 SYMATTR InstName C9 SYMATTR Value 1µ SYMATTR SpiceLine Rser=0.005 SYMBOL diode 1680 880 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL cap 1520 704 R0 WINDOW 3 38 34 Left 2 WINDOW 123 24 60 Left 2 SYMATTR Value 10µ SYMATTR Value2 x3 SYMATTR InstName C10 SYMATTR SpiceLine Rser=0.005 SYMBOL res 1696 400 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R10 SYMATTR Value 10m SYMBOL res 1696 704 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R11 SYMATTR Value 10m SYMBOL res 736 448 R0 SYMATTR InstName R12 SYMATTR Value 100K SYMBOL res 576 448 R0 SYMATTR InstName R13 SYMATTR Value 1K SYMBOL res 576 704 R0 SYMATTR InstName R14 SYMATTR Value 4.99K SYMBOL pnp 656 672 R180 WINDOW 0 4 68 Right 2 WINDOW 3 9 28 Right 2 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL res 736 656 R0 SYMATTR InstName R15 SYMATTR Value 100K SYMBOL cap 1456 880 R0 SYMATTR InstName C11 SYMATTR Value .01µ SYMBOL ind 1232 -80 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 470µ SYMBOL res 1344 -96 R0 SYMATTR Value 1.47Meg SYMATTR InstName R16 SYMBOL res 1344 0 R0 SYMATTR InstName R17 SYMATTR Value 280K SYMBOL cap 1488 -80 R0 SYMATTR InstName C12 SYMATTR Value 10µ SYMBOL LTC3632 1104 48 R0 SYMATTR InstName U4 SYMBOL pnp 816 64 M270 WINDOW 0 99 50 VTop 2 WINDOW 3 70 47 VTop 2 SYMATTR InstName Q2 SYMATTR Value 2N3906 SYMBOL res 752 64 R0 SYMATTR InstName R18 SYMATTR Value 1K SYMBOL res 864 0 R0 SYMATTR InstName R19 SYMATTR Value 10K SYMBOL res 992 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R20 SYMATTR Value 806K SYMBOL res 1648 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R21 SYMATTR Value 549 SYMBOL npn 1776 128 R90 WINDOW 0 39 35 VRight 2 WINDOW 3 78 8 VRight 2 SYMATTR InstName Q3 SYMATTR Value 2N3019 SYMBOL res 1632 384 R0 SYMATTR InstName R22 SYMATTR Value 10K SYMBOL res 1632 688 R0 SYMATTR InstName R23 SYMATTR Value 10K SYMBOL PowerProducts\\LT3092 112 720 R0 SYMATTR InstName U5 SYMBOL cap -112 608 R0 SYMATTR InstName C13 SYMATTR Value 1µ SYMBOL res 256 880 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R24 SYMATTR Value 200 SYMBOL res 416 864 R0 SYMATTR InstName R25 SYMATTR Value 47.5k SYMBOL res 576 864 R0 SYMATTR InstName R26 SYMATTR Value 73.5K SYMBOL res 1952 384 R0 SYMATTR InstName Rload SYMATTR Value 8 TEXT 1544 984 Left 2 !.tran 3m startup TEXT 768 -176 Bottom 2 ;LT3081 - 1.5A Single Resistor Rugged Linear Regulator with Monitors\nLT8612 - 42V, 6A Synchronous Step-Down Regulator with 3µA Quiescent Current\nLTC3632 - High Efficiency, High Voltage 20mA Synchronous Step-Down Converter\nLT3092 - 200mA 2-Terminal Programmable Current Source\n24V 3A Constant Voltage, Constant Current Bench Supply\nInput: 10V to 40V Output: 0V to 25V @ 0 to 3.1A TEXT 232 1048 Left 2 ;Note:\n Details description of this circuit is available in July 2014 edition of LT Journal of Analog Inovation.\n A smaller RUN/SS capacitors on the LT8612 is being used to reduce simulation time. The typical value should be 0.1µF.\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 © 2015 Linear Technology Inc. All rights reserved. TEXT 1176 912 Right 2 ;Vout\nAdjust TEXT 1416 424 Right 2 ;Ilim\nAdjust