Version 4 SHEET 1 2652 1068 WIRE -448 -1024 -560 -1024 WIRE -352 -1024 -448 -1024 WIRE -304 -1024 -352 -1024 WIRE -96 -1024 -304 -1024 WIRE 0 -1024 -96 -1024 WIRE 384 -1024 0 -1024 WIRE 528 -1024 384 -1024 WIRE 608 -1024 528 -1024 WIRE -560 -1008 -560 -1024 WIRE 528 -1008 528 -1024 WIRE -448 -992 -448 -1024 WIRE 144 -992 -208 -992 WIRE 416 -992 144 -992 WIRE 480 -992 416 -992 WIRE 416 -976 416 -992 WIRE 0 -960 0 -1024 WIRE 144 -960 144 -992 WIRE -304 -928 -304 -960 WIRE -560 -912 -560 -928 WIRE -448 -912 -448 -928 WIRE 528 -912 528 -944 WIRE -96 -896 -96 -1024 WIRE -80 -896 -96 -896 WIRE 384 -896 384 -1024 WIRE 384 -896 368 -896 WIRE 416 -880 416 -912 WIRE -208 -800 -208 -992 WIRE -176 -800 -208 -800 WIRE -80 -800 -96 -800 WIRE 384 -800 368 -800 WIRE 480 -800 480 -992 WIRE 480 -800 464 -800 WIRE -352 -784 -352 -1024 WIRE 608 -784 608 -1024 WIRE -80 -704 -304 -704 WIRE 560 -704 368 -704 WIRE -80 -608 -144 -608 WIRE 416 -608 368 -608 WIRE -144 -592 -144 -608 WIRE 416 -592 416 -608 WIRE -832 -512 -944 -512 WIRE -736 -512 -832 -512 WIRE -656 -512 -736 -512 WIRE -640 -512 -656 -512 WIRE -544 -512 -560 -512 WIRE -480 -512 -544 -512 WIRE -352 -512 -352 -688 WIRE -352 -512 -400 -512 WIRE -144 -512 -144 -528 WIRE -144 -512 -352 -512 WIRE -80 -512 -144 -512 WIRE 416 -512 416 -528 WIRE 416 -512 368 -512 WIRE 608 -512 608 -688 WIRE 608 -512 416 -512 WIRE 688 -512 608 -512 WIRE 816 -512 768 -512 WIRE 832 -512 816 -512 WIRE 928 -512 912 -512 WIRE 976 -512 928 -512 WIRE 1056 -512 976 -512 WIRE 1104 -512 1056 -512 WIRE -944 -496 -944 -512 WIRE -832 -496 -832 -512 WIRE -736 -496 -736 -512 WIRE -352 -496 -352 -512 WIRE 608 -496 608 -512 WIRE 976 -496 976 -512 WIRE 1104 -496 1104 -512 WIRE -80 -416 -304 -416 WIRE 560 -416 368 -416 WIRE -944 -400 -944 -416 WIRE -832 -400 -832 -432 WIRE -736 -400 -736 -432 WIRE 976 -400 976 -432 WIRE 1104 -400 1104 -416 WIRE -352 -384 -352 -400 WIRE 608 -384 608 -400 WIRE -544 -320 -544 -512 WIRE -80 -320 -544 -320 WIRE 816 -320 816 -512 WIRE 816 -320 368 -320 WIRE -656 -224 -656 -512 WIRE -80 -224 -656 -224 WIRE 928 -224 928 -512 WIRE 928 -224 368 -224 WIRE 1056 -224 1056 -512 WIRE -656 -128 -656 -224 WIRE -80 -128 -656 -128 WIRE 1056 -128 1056 -144 WIRE 1056 -128 368 -128 WIRE 1056 -112 1056 -128 WIRE -448 -32 -496 -32 WIRE -336 -32 -368 -32 WIRE -80 -32 -336 -32 WIRE 528 -32 368 -32 WIRE 592 -32 528 -32 WIRE 720 -32 672 -32 WIRE -496 -16 -496 -32 WIRE -336 -16 -336 -32 WIRE 528 -16 528 -32 WIRE 720 -16 720 -32 WIRE 1056 -16 1056 -32 WIRE -496 64 -496 48 WIRE -336 64 -336 48 WIRE -160 64 -176 64 WIRE -80 64 -96 64 WIRE 400 64 368 64 WIRE 480 64 464 64 WIRE 528 64 528 48 WIRE 720 64 720 48 WIRE 400 160 368 160 WIRE 512 160 480 160 WIRE -80 256 -96 256 WIRE 384 256 368 256 WIRE 0 336 0 320 WIRE 288 336 288 320 WIRE -208 368 -208 -800 WIRE 96 368 96 320 WIRE 96 368 -208 368 WIRE 192 368 192 320 WIRE 192 368 96 368 WIRE 288 416 288 400 FLAG -560 -912 0 FLAG 0 336 0 FLAG 608 -384 0 FLAG 416 -880 0 FLAG 976 -400 0 FLAG 1056 -16 0 FLAG 1104 -400 0 FLAG 720 64 0 FLAG 480 64 0 FLAG -352 -384 0 FLAG -736 -400 0 FLAG -944 -400 0 FLAG -496 64 0 FLAG -176 64 0 FLAG -560 -1024 IN FLAG 1104 -512 OUT2 FLAG -944 -512 OUT1 FLAG 288 416 0 FLAG 512 160 0 FLAG 384 256 0 FLAG -832 -400 0 FLAG -96 256 0 FLAG -448 -912 0 FLAG 528 -912 0 FLAG -304 -928 0 FLAG -336 64 0 FLAG 528 64 0 SYMBOL voltage -560 -1024 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 55 SYMBOL cap 400 -976 R0 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL cap 400 -592 R0 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL ind 672 -496 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 60µ SYMATTR SpiceLine Ipk=20 Rser=0.005 Rpar=0 Cpar=0 mfg="Hurricane" pn="HL-8113" SYMBOL res 816 -496 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R1 SYMATTR Value 15m SYMBOL polcap 960 -496 R0 WINDOW 3 24 56 Left 2 SYMATTR Value 33µ SYMATTR InstName C3 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=16 Irms=1.285 Rser=50m Lser=0 SYMBOL res 1040 -240 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL res 1040 -128 R0 SYMATTR InstName R3 SYMATTR Value 2.26k SYMBOL cap 400 80 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C5 SYMATTR Value .001µ SYMBOL cap -160 -592 R0 SYMATTR InstName C6 SYMATTR Value .1µ SYMBOL res -544 -496 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R4 SYMATTR Value 4m SYMBOL polcap -752 -496 R0 WINDOW 3 24 56 Left 2 SYMATTR Value 220µ SYMATTR InstName C7 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=6.3 Irms=4.1 Rser=0.009 Lser=0 mfg="KEMET" pn="T520D227M006ASE009" type="Tantalum" SYMBOL cap -96 80 M270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C9 SYMATTR Value .001µ SYMBOL res 1088 -512 R0 SYMATTR InstName Rload2 SYMATTR Value 18 SYMBOL res -960 -512 R0 SYMATTR InstName Rload1 SYMATTR Value 0.66 SYMBOL nmos -304 -784 M0 SYMATTR InstName Q3 SYMATTR Value BSC057N08NS3 SYMBOL nmos -304 -496 M0 SYMATTR InstName Q4 SYMATTR Value BSC042NE7NS3 SYMBOL LTC3892 144 -320 R0 SYMATTR InstName U1 SYMBOL cap 272 336 R0 SYMATTR InstName C10 SYMATTR Value 4.7µ SYMBOL nmos 560 -496 R0 SYMATTR InstName Q1 SYMATTR Value BSC042NE7NS3 SYMBOL nmos 560 -784 R0 SYMATTR InstName Q2 SYMATTR Value BSC057N08NS3 SYMBOL res 384 176 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 35.7K SYMBOL cap -848 -496 R0 SYMATTR InstName C11 SYMATTR Value 10µ SYMATTR SpiceLine V=10 Irms=10.158 Rser=0.004 Lser=0 mfg="KEMET" pn="C1206C106K8PAC" type="X5R" SYMBOL cap 704 48 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C4 SYMATTR Value 4.7n SYMBOL res 688 -48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 19.6K SYMBOL cap 512 48 M180 WINDOW 0 24 56 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C13 SYMATTR Value 47p SYMBOL cap -512 -16 R0 SYMATTR InstName C8 SYMATTR Value 15n SYMBOL res -352 -48 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 5.1K SYMBOL cap -352 -16 R0 SYMATTR InstName C14 SYMATTR Value 47p SYMBOL ind -496 -496 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 6.8µ SYMATTR SpiceLine Ipk=7.5 Rser=0.0175 Rpar=0 Cpar=0 mfg="Vishay" pn="IHLP4040DZ11-6R8" SYMBOL polcap -464 -992 R0 WINDOW 3 24 56 Left 2 SYMATTR Value 33µ SYMATTR InstName C16 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=16 Irms=1.285 Rser=50m Lser=0 SYMBOL cap 512 -1008 R0 SYMATTR InstName C17 SYMATTR Value 2µ SYMATTR SpiceLine Rser=2m SYMBOL cap -320 -1024 R0 WINDOW 0 33 21 Left 2 WINDOW 3 24 66 Left 2 SYMATTR InstName C18 SYMATTR Value 2µ SYMATTR SpiceLine Rser=2m SYMBOL res -192 -784 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R8 SYMATTR Value 100K SYMBOL res 480 -816 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 100K TEXT 704 248 Left 2 !.tran 2m startup TEXT 120 -1160 Center 3 ;LTC3892 - 60V Low Iq, Dual, 2-Phase Synchronous Step-Down DC/DC Controller\nHigh Efficiency Dual 3.3V/36V Output Step-Down Converter\nInput: 7.5V to 60V Output: 3.3V @ 5.0A, 36V @ 2.0A, Fsw = 200kHz TEXT -552 432 Left 2 ;Notes:\n This device has the ability to adjust gate drive voltage from 5V to 10V with no required external boost diodes.\n The output voltage can be set as low as 0.8V to as high as the input voltage, with certain modifications.\n SS capacitors have been reduced to speed up simulation time. Typical values 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.