Version 4
SHEET 1 1684 740
WIRE 560 64 160 64
WIRE -560 80 -672 80
WIRE -352 80 -496 80
WIRE 32 80 -352 80
WIRE -672 96 -672 80
WIRE 32 96 32 80
WIRE 160 96 160 64
WIRE -352 160 -496 160
WIRE -64 160 -352 160
WIRE 560 160 560 64
WIRE 560 160 256 160
WIRE -352 176 -352 160
WIRE -672 224 -672 176
WIRE -240 240 -256 240
WIRE -160 240 -176 240
WIRE -64 240 -80 240
WIRE 288 240 256 240
WIRE 384 240 288 240
WIRE 448 240 384 240
WIRE 560 240 560 160
WIRE 560 240 528 240
WIRE 656 240 560 240
WIRE 752 240 656 240
WIRE 848 240 752 240
WIRE 1008 240 848 240
WIRE -352 256 -352 240
WIRE 288 256 288 240
WIRE 384 256 384 240
WIRE 752 256 752 240
WIRE 848 256 848 240
WIRE -496 272 -496 160
WIRE 560 272 560 240
WIRE 1008 288 1008 240
WIRE -688 320 -784 320
WIRE -560 320 -608 320
WIRE -208 320 -256 320
WIRE -64 320 -128 320
WIRE 288 320 256 320
WIRE 384 336 384 320
WIRE 656 336 656 240
WIRE -784 352 -784 320
WIRE 752 352 752 320
WIRE 848 352 848 336
WIRE -64 400 -160 400
WIRE 560 400 560 352
WIRE 560 400 256 400
WIRE 560 416 560 400
WIRE -496 432 -496 368
WIRE 1008 432 1008 368
WIRE 96 464 96 448
WIRE -784 480 -784 432
WIRE 1104 480 1072 480
WIRE 1248 480 1184 480
WIRE 560 512 560 496
WIRE 1248 512 1248 480
WIRE -160 544 -160 400
WIRE 656 544 656 416
WIRE 656 544 -160 544
WIRE 1008 560 1008 528
WIRE 1248 640 1248 592
FLAG 384 336 0
FLAG 752 352 0
FLAG 560 512 0
FLAG -256 240 0
FLAG -672 224 0
FLAG 96 464 0
FLAG 848 352 0
FLAG -256 320 0
FLAG -352 256 0
FLAG 848 240 OUT
FLAG 1008 560 0
FLAG 1248 640 0
FLAG -496 432 0
FLAG -784 480 0
FLAG -784 320 Shutdown
FLAG 1248 480 StepLoad
SYMBOL ind 432 256 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 4.7µ
SYMATTR SpiceLine Rpar=2K
SYMBOL schottky 368 320 M180
WINDOW 0 28 62 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value MBRS340
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 736 256 R0
SYMATTR InstName C1
SYMATTR Value 22µ
SYMBOL voltage -672 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 7
SYMBOL res 544 256 R0
SYMATTR InstName R1
SYMATTR Value 165K
SYMBOL res 544 400 R0
SYMATTR InstName R2
SYMATTR Value 56K
SYMBOL cap 272 256 R0
WINDOW 3 30 49 Left 2
SYMATTR Value .47µ
SYMATTR InstName C2
SYMBOL cap -176 224 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 4700p
SYMBOL res -64 224 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 16.2K
SYMBOL res -112 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 60.4K
SYMBOL res 640 320 R0
SYMATTR InstName R5
SYMATTR Value 100K
SYMBOL res -368 64 R0
SYMATTR InstName R6
SYMATTR Value 100K
SYMBOL cap -368 176 R0
SYMATTR InstName C4
SYMATTR Value .01µ
SYMBOL PowerProducts\\LT3684 96 288 R0
SYMATTR InstName U1
SYMBOL res 832 240 R0
SYMATTR InstName Rload
SYMATTR Value 83
SYMBOL voltage 1248 496 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 3 .001 0 0 .0005 .001 2)
SYMBOL npn 1072 432 M0
SYMATTR InstName Q1
SYMBOL res 992 272 R0
SYMATTR InstName Rload1
SYMATTR Value 50
SYMBOL res 1088 496 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName Rload2
SYMATTR Value 50
SYMBOL voltage -784 336 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 2.8 1.8ms 0 0 .4ms)
SYMBOL res -704 336 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName Rload3
SYMATTR Value 50
SYMBOL npn -560 272 R0
SYMATTR InstName Q2
SYMBOL diode -560 96 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
TEXT 704 448 Left 2 !.tran 3m startup
TEXT -448 544 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 © 2007 Linear Technology Inc. All rights reserved.
TEXT 96 40 Bottom 2 ;LT3684 - 36V, 2A Step-Down Switching Regulator \nInput: 24V       Output: 5.0V@2A
TEXT -152 -48 Left 2 ;Modified to evaluate for PowerLock project.
