Version 4 SHEET 1 2076 1228 WIRE 192 -192 96 -192 WIRE 96 -176 96 -192 WIRE -272 -96 -336 -96 WIRE -144 -96 -208 -96 WIRE 32 -96 -144 -96 WIRE 32 -80 32 -96 WIRE 96 -80 96 -96 WIRE 112 -80 96 -80 WIRE 192 -80 192 -192 WIRE 368 -80 192 -80 WIRE 368 -64 368 -80 WIRE 192 -48 192 -80 WIRE -144 -32 -144 -96 WIRE -432 32 -544 32 WIRE -336 32 -336 -96 WIRE -336 32 -432 32 WIRE -272 32 -336 32 WIRE 144 32 -16 32 WIRE 32 64 32 -16 WIRE 192 64 192 48 WIRE 192 64 32 64 WIRE 368 64 368 0 WIRE 368 64 192 64 WIRE 432 64 368 64 WIRE 432 96 432 64 WIRE 672 96 432 96 WIRE 880 96 672 96 WIRE 992 96 960 96 WIRE 1120 96 1088 96 WIRE 1264 96 1200 96 WIRE 1328 96 1264 96 WIRE -272 112 -352 112 WIRE 32 112 32 64 WIRE 32 112 -16 112 WIRE 272 112 192 112 WIRE -544 128 -544 32 WIRE -432 128 -432 112 WIRE 272 144 272 112 WIRE 336 144 272 144 WIRE 992 144 992 96 WIRE 1088 144 1088 96 WIRE 1264 160 1264 96 WIRE -352 192 -352 112 WIRE -352 192 -480 192 WIRE -272 192 -320 192 WIRE 144 192 -16 192 WIRE -544 224 -544 208 WIRE -480 224 -480 192 WIRE -480 224 -544 224 WIRE -432 224 -480 224 WIRE 336 224 336 144 WIRE 992 224 336 224 WIRE 192 240 192 208 WIRE -496 272 -544 272 WIRE -144 288 -144 256 WIRE -320 304 -320 192 WIRE -208 304 -320 304 WIRE 1088 304 1088 224 WIRE 1264 304 1264 240 WIRE -544 320 -544 272 WIRE -432 368 -432 320 WIRE -272 400 -304 400 WIRE -208 400 -208 304 WIRE -208 400 -272 400 WIRE -208 416 -208 400 WIRE -544 432 -544 400 WIRE -304 432 -304 400 WIRE -304 432 -544 432 WIRE -1040 576 -1456 576 WIRE -528 576 -816 576 WIRE -416 576 -528 576 WIRE -272 576 -272 400 WIRE -272 576 -336 576 WIRE -1456 592 -1456 576 WIRE -528 592 -528 576 WIRE -1040 656 -1072 656 WIRE -752 656 -816 656 WIRE -624 656 -752 656 WIRE -752 672 -752 656 WIRE -624 672 -624 656 WIRE -528 688 -528 672 WIRE -1456 704 -1456 672 WIRE -1136 736 -1152 736 WIRE -1040 736 -1056 736 WIRE -752 736 -816 736 WIRE -752 752 -752 736 WIRE -624 768 -624 752 FLAG -1456 704 0 FLAG -624 768 0 FLAG -528 576 PWMOUT FLAG -528 688 0 FLAG -752 752 0 FLAG -1152 736 0 FLAG -1072 656 0 FLAG -1456 576 AnalogIN FLAG -432 368 0 FLAG -432 128 0 FLAG 192 240 0 FLAG 112 -80 0 FLAG -144 288 0 FLAG 1088 304 0 FLAG 992 96 1 FLAG 1088 96 2 FLAG 1328 96 out FLAG 672 96 in FLAG 1264 304 0 SYMBOL res -1040 720 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 1000k SYMBOL res -544 576 R0 SYMATTR InstName R4 SYMATTR Value 10K SYMBOL voltage -624 656 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 6 SYMBOL voltage -1456 576 R0 WINDOW 123 24 146 Left 2 WINDOW 39 24 125 Left 2 SYMATTR Value 0.5 SYMATTR InstName V2 SYMBOL SpecialFunctions\\LTC6992-1 -928 656 R0 SYMATTR InstName U1 SYMBOL cap -768 672 R0 WINDOW 0 39 10 Left 2 WINDOW 3 36 53 Left 2 SYMATTR InstName C1 SYMATTR Value 0.1µ SYMATTR SpiceLine Rser=.003 SYMBOL res -320 560 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 100 SYMBOL voltage -432 16 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V5 SYMATTR Value 12 SYMBOL diode -272 -80 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MUR460 SYMBOL cap 16 -80 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMATTR SpiceLine V=50 Irms=5.62 Rser=0.007 Lser=0 mfg="KEMET" pn="C1210C105K5PAC" type="X5R" SYMBOL nmos 144 -48 R0 SYMATTR InstName M1 SYMATTR Value Si9420DY SYMBOL nmos 144 112 R0 SYMATTR InstName M2 SYMATTR Value Si9420DY SYMBOL voltage 96 -192 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V6 SYMATTR Value 100 SYMBOL diode 384 0 R180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value MUR460 SYMBOL PowerProducts\\LTC4446 -144 112 R0 SYMATTR InstName U2 SYMBOL npn2 -496 224 R0 SYMATTR InstName Q1 SYMBOL res -560 112 R0 SYMATTR InstName R5 SYMATTR Value 100 SYMBOL res -560 304 R0 SYMATTR InstName R6 SYMATTR Value 100 SYMBOL ind2 976 128 R0 SYMATTR InstName L1 SYMATTR Value 1m SYMATTR Type ind SYMATTR SpiceLine Ipk=200 Rser=1 Rpar=9000 Cpar=1p SYMBOL ind2 1072 128 R0 SYMATTR InstName L2 SYMATTR Value 10µ SYMATTR Type ind SYMATTR SpiceLine Ipk=200 Rser=1 Rpar=9000 Cpar=1p SYMBOL Misc\\EuropeanResistor 864 112 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RP1 SYMATTR Value 20 SYMBOL Misc\\EuropeanResistor 1104 112 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RS1 SYMATTR Value 20 SYMBOL Misc\\EuropeanResistor 1248 144 R0 SYMATTR InstName RP2 SYMATTR Value 1000 TEXT -536 760 Left 2 !.tran 1000u TEXT -448 1072 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 © 2010 Linear Technology Inc. All rights reserved. TEXT -936 528 Bottom 2 ;LTC6992-1: TimerBlox: Voltage-Controlled Pulse Width Modulator\n1MHz Pulse Width Modulator (PWM) TEXT 992 40 Left 2 !K1 L1 L2 1 RECTANGLE Normal 1216 256 848 16 2