Version 4
SHEET 1 1008 1164
WIRE 560 -32 400 -32
WIRE 768 -32 640 -32
WIRE -208 48 -224 48
WIRE -112 48 -208 48
WIRE 240 48 144 48
WIRE 768 48 768 -32
WIRE 768 48 320 48
WIRE 496 96 496 -176
WIRE -464 144 -464 -176
WIRE -336 144 -336 -176
WIRE -224 144 -224 48
WIRE 400 144 400 -32
WIRE 464 144 400 144
WIRE 768 176 768 48
WIRE 768 176 608 176
WIRE 880 176 768 176
WIRE -112 208 -112 48
WIRE 48 208 -112 208
WIRE 144 208 144 48
WIRE 144 208 112 208
WIRE 192 208 144 208
WIRE 304 208 256 208
WIRE 464 208 304 208
WIRE 304 288 304 208
WIRE 400 288 400 144
WIRE 496 304 496 256
WIRE 544 304 544 256
WIRE 544 304 496 304
WIRE -464 448 -464 224
WIRE -336 448 -336 224
WIRE -224 448 -224 224
WIRE 304 448 304 368
WIRE 400 448 400 368
WIRE 496 448 496 304
WIRE 432 624 272 624
WIRE 624 624 496 624
WIRE 176 720 -192 720
WIRE 272 720 272 624
WIRE 272 720 240 720
WIRE 304 720 272 720
WIRE 400 720 368 720
WIRE 496 720 400 720
WIRE 624 720 624 624
WIRE 624 720 576 720
WIRE 768 720 624 720
WIRE 496 816 496 800
WIRE 272 864 272 720
WIRE 400 864 400 720
WIRE 464 864 400 864
WIRE 768 896 768 720
WIRE 768 896 608 896
WIRE 880 896 768 896
WIRE 464 928 400 928
WIRE 496 1008 496 976
WIRE 544 1008 544 976
WIRE 544 1008 496 1008
WIRE 272 1072 272 944
WIRE 400 1072 400 928
WIRE 544 1072 544 1008
FLAG -336 448 0
FLAG 496 448 0
FLAG -336 -176 +3V3
FLAG -224 448 0
FLAG 496 -176 +3V3
FLAG 400 448 Vref
FLAG 304 448 Vref
FLAG -464 448 0
FLAG -464 -176 Vref
FLAG 880 176 Vout-SK
FLAG 400 1072 Vref
FLAG 272 1072 Vref
FLAG 544 1072 0
FLAG 496 800 +3V3
FLAG -192 720 Vin
FLAG 880 896 Vout-MFB
FLAG -208 48 Vin
FLAG 144 48 SK-In
FLAG 272 624 MFB-In
SYMBOL Opamps\\LT6230-10 496 176 R0
SYMATTR InstName U1
SYMBOL voltage -336 128 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL voltage -224 128 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 1
SYMATTR InstName V2
SYMATTR Value SINE(1.25 0.0125 50k)
SYMBOL res 384 272 R0
SYMATTR InstName R3
SYMATTR Value 324
SYMBOL res 656 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 20k8
SYMBOL cap 112 192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL cap 256 192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1n
SYMBOL res 288 272 R0
SYMATTR InstName R1
SYMATTR Value 332
SYMBOL res 336 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 11k8
SYMBOL voltage -464 128 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 1.25
SYMBOL res 592 704 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 15.8k
SYMBOL cap 240 704 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 15n
SYMBOL res 256 848 R0
SYMATTR InstName R6
SYMATTR Value 78.7
SYMBOL cap 368 704 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 15n
SYMBOL Opamps\\LT6230-10 496 896 R0
SYMATTR InstName U2
SYMBOL cap 496 608 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 220p
TEXT -472 840 Left 2 !.ac oct 20 10 10000k
TEXT -472 872 Left 2 !;noise V(Vout-sk) V2 oct 20 10 10000k
TEXT -464 968 Left 2 !.option plotwinsize=0
TEXT -464 1000 Left 2 !.option numdgt=10
TEXT -472 904 Left 2 !;tran 0 11ms 1ms startup