Version 4
SHEET 1 2020 1012
WIRE -208 16 -320 16
WIRE -128 16 -208 16
WIRE -96 16 -128 16
WIRE 96 16 -96 16
WIRE -320 32 -320 16
WIRE -208 32 -208 16
WIRE 96 32 96 16
WIRE -96 80 -96 16
WIRE -64 80 -96 80
WIRE 320 80 256 80
WIRE 560 80 400 80
WIRE -320 128 -320 112
WIRE -208 128 -208 96
WIRE -128 176 -128 16
WIRE -64 176 -128 176
WIRE 560 176 560 80
WIRE 560 176 256 176
WIRE -144 272 -176 272
WIRE -64 272 -80 272
WIRE 288 272 256 272
WIRE -160 368 -176 368
WIRE -64 368 -80 368
WIRE 288 368 288 336
WIRE 288 368 256 368
WIRE 352 368 288 368
WIRE 448 368 432 368
WIRE 560 368 560 176
WIRE 560 368 448 368
WIRE 656 368 560 368
WIRE 448 384 448 368
WIRE 560 384 560 368
WIRE 656 384 656 368
WIRE 448 464 256 464
WIRE 448 480 448 464
WIRE 560 480 560 448
WIRE 656 480 656 464
WIRE -240 560 -256 560
WIRE -160 560 -176 560
WIRE -64 560 -80 560
WIRE 272 560 256 560
WIRE 352 560 336 560
WIRE 448 576 448 560
WIRE 96 624 96 608
FLAG 96 624 0
FLAG -176 368 0
FLAG 448 576 0
FLAG 560 480 0
FLAG 656 480 0
FLAG -320 128 0
FLAG -320 16 IN
FLAG 656 368 OUT
FLAG -208 128 0
FLAG -176 272 0
FLAG -256 560 0
FLAG 352 560 0
SYMBOL ind 336 384 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 3.3µ
SYMBOL res 432 368 R0
SYMATTR InstName R4
SYMATTR Value 316K
SYMBOL res 432 464 R0
SYMATTR InstName R5
SYMATTR Value 102K
SYMBOL res -64 352 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 45.3K
SYMBOL cap 544 384 R0
WINDOW 3 24 60 Left 2
SYMATTR Value 47µ
SYMATTR InstName C4
SYMBOL res 640 368 R0
SYMATTR InstName Rload
SYMATTR Value 3.3
SYMBOL cap 272 272 R0
SYMATTR InstName C5
SYMATTR Value 0.68µ
SYMBOL voltage -320 16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL cap -224 32 R0
SYMATTR InstName C1
SYMATTR Value 10µ
SYMBOL PowerProducts\\LT3690 96 272 R0
SYMATTR InstName U1
SYMBOL cap -80 256 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 0.47µ
SYMBOL res -64 544 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 21.5K
SYMBOL cap -176 544 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 680p
SYMBOL res 416 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL cap 272 576 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 1000p
TEXT -448 632 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 © 2011 Linear Technology Inc. All rights reserved.
TEXT 168 0 Bottom 2 ;LT3690 - 36V, 4A. 1.5MHz Synchronous Step-Down Switching Regulator with 70µA Quiescent Current\nInput: 12V       Output: 3.3V @ 4A
TEXT 568 600 Left 2 !.tran 800u startup
