Version 4
SHEET 1 3276 836
WIRE -9328 -3296 -9440 -3296
WIRE -9088 -3296 -9328 -3296
WIRE -8944 -3296 -9088 -3296
WIRE -8848 -3296 -8944 -3296
WIRE -8768 -3296 -8848 -3296
WIRE -8656 -3296 -8768 -3296
WIRE -9440 -3280 -9440 -3296
WIRE -9328 -3280 -9328 -3296
WIRE -8768 -3280 -8768 -3296
WIRE -9088 -3264 -9088 -3296
WIRE -8656 -3264 -8656 -3296
WIRE -8944 -3216 -8944 -3296
WIRE -8768 -3184 -8768 -3216
WIRE -9536 -3168 -9552 -3168
WIRE -9440 -3168 -9440 -3200
WIRE -9440 -3168 -9472 -3168
WIRE -9328 -3168 -9328 -3200
WIRE -9296 -3168 -9328 -3168
WIRE -9184 -3168 -9216 -3168
WIRE -8656 -3168 -8656 -3184
WIRE -9088 -3136 -9088 -3184
WIRE -9088 -3136 -9216 -3136
WIRE -8992 -3136 -9088 -3136
WIRE -8944 -3104 -8944 -3120
WIRE -8944 -3104 -9792 -3104
WIRE -9440 -3088 -9440 -3168
WIRE -9328 -3088 -9328 -3168
WIRE -9216 -3088 -9216 -3136
WIRE -9792 -3024 -9792 -3104
WIRE -9552 -3024 -9792 -3024
WIRE -9072 -3024 -9104 -3024
WIRE -9040 -3024 -9072 -3024
WIRE -8944 -3024 -8944 -3104
WIRE -8944 -3024 -8976 -3024
WIRE -8848 -3008 -8848 -3296
WIRE -9792 -2928 -9792 -3024
WIRE -9584 -2928 -9792 -2928
WIRE -9552 -2928 -9584 -2928
WIRE -8896 -2928 -9104 -2928
WIRE -9072 -2912 -9072 -3024
WIRE -9792 -2832 -9792 -2928
WIRE -9776 -2832 -9792 -2832
WIRE -9664 -2832 -9696 -2832
WIRE -9584 -2832 -9584 -2928
WIRE -9552 -2832 -9584 -2832
WIRE -9072 -2832 -9072 -2848
WIRE -9072 -2832 -9104 -2832
WIRE -8848 -2832 -8848 -2912
WIRE -8848 -2832 -9072 -2832
WIRE -8800 -2832 -8848 -2832
WIRE -8752 -2832 -8800 -2832
WIRE -8624 -2832 -8672 -2832
WIRE -8560 -2832 -8624 -2832
WIRE -8416 -2832 -8560 -2832
WIRE -8176 -2832 -8416 -2832
WIRE -8032 -2832 -8176 -2832
WIRE -7696 -2832 -7776 -2832
WIRE -7504 -2832 -7696 -2832
WIRE -8560 -2816 -8560 -2832
WIRE -8416 -2816 -8416 -2832
WIRE -9664 -2800 -9664 -2832
WIRE -8800 -2800 -8800 -2832
WIRE -8176 -2800 -8176 -2832
WIRE -7696 -2800 -7696 -2832
WIRE -7504 -2800 -7504 -2832
WIRE -9552 -2736 -9568 -2736
WIRE -9072 -2736 -9104 -2736
WIRE -8944 -2736 -8944 -3024
WIRE -8944 -2736 -9072 -2736
WIRE -8944 -2720 -8944 -2736
WIRE -8800 -2720 -8800 -2736
WIRE -8560 -2720 -8560 -2752
WIRE -8416 -2720 -8416 -2736
WIRE -9664 -2704 -9664 -2720
WIRE -8176 -2704 -8176 -2736
WIRE -7696 -2704 -7696 -2736
WIRE -7504 -2688 -7504 -2720
WIRE -7504 -2688 -7584 -2688
WIRE -7504 -2672 -7504 -2688
WIRE -9792 -2640 -9792 -2832
WIRE -9552 -2640 -9792 -2640
WIRE -9072 -2640 -9072 -2736
WIRE -9072 -2640 -9104 -2640
WIRE -8944 -2640 -8944 -2656
WIRE -7904 -2640 -7904 -2736
WIRE -7584 -2640 -7584 -2688
WIRE -7584 -2640 -7904 -2640
WIRE -9680 -2544 -9744 -2544
WIRE -9552 -2544 -9616 -2544
WIRE -8624 -2544 -8624 -2832
WIRE -8624 -2544 -9104 -2544
WIRE -7504 -2544 -7504 -2592
WIRE -8624 -2496 -8624 -2544
WIRE -9056 -2480 -9088 -2480
WIRE -9728 -2448 -9744 -2448
WIRE -9632 -2448 -9648 -2448
WIRE -9552 -2448 -9568 -2448
WIRE -9088 -2448 -9088 -2480
WIRE -9088 -2448 -9104 -2448
WIRE -8848 -2432 -8848 -2832
WIRE -9056 -2416 -9056 -2480
WIRE -8624 -2384 -8624 -2416
WIRE -8624 -2384 -8688 -2384
WIRE -8624 -2368 -8624 -2384
WIRE -9632 -2352 -9744 -2352
WIRE -9552 -2352 -9632 -2352
WIRE -8896 -2352 -9104 -2352
WIRE -9744 -2336 -9744 -2352
WIRE -9632 -2336 -9632 -2352
WIRE -8624 -2272 -8624 -2288
WIRE -9632 -2256 -9632 -2272
WIRE -9552 -2256 -9632 -2256
WIRE -8848 -2256 -8848 -2336
WIRE -8848 -2256 -9104 -2256
WIRE -9744 -2240 -9744 -2272
WIRE -8848 -2240 -8848 -2256
WIRE -9440 -2176 -9440 -2192
WIRE -9216 -2176 -9216 -2192
WIRE -9744 -2144 -9744 -2160
WIRE -9632 -2144 -9632 -2256
WIRE -9632 -2144 -9744 -2144
WIRE -8688 -2144 -8688 -2384
WIRE -8688 -2144 -9632 -2144
FLAG -8656 -3168 0
FLAG -8848 -2240 0
FLAG -8944 -2640 0
FLAG -8800 -2720 0
FLAG -9216 -2176 0
FLAG -9440 -2176 0
FLAG -8624 -2272 0
FLAG -8560 -2720 0
FLAG -8416 -2720 0
FLAG -9744 -2544 0
FLAG -8416 -2832 OUT
FLAG -8656 -3296 IN
FLAG -9568 -2736 0
FLAG -9744 -2448 0
FLAG -8768 -3184 0
FLAG -9552 -3168 0
FLAG -9664 -2704 0
FLAG -9184 -3168 0
FLAG -9600 -2816 0
FLAG -9056 -2416 0
FLAG -8176 -2704 0
FLAG -7696 -2704 0
FLAG -7504 -2544 0
SYMBOL voltage -8656 -3280 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 80
SYMBOL res -9456 -3296 R0
SYMATTR InstName R8
SYMATTR Value 261K
SYMBOL nmos -8992 -3216 R0
SYMATTR InstName Q3
SYMATTR Value BSH114
SYMBOL res -9104 -3280 R0
SYMATTR InstName R9
SYMATTR Value 80.6K
SYMBOL schottky -8976 -3040 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap -9088 -2912 R0
SYMATTR InstName C9
SYMATTR Value .1µ
SYMBOL nmos -8896 -3008 R0
SYMATTR InstName Q4
SYMATTR Value Si7850DP
SYMBOL nmos -8896 -2432 R0
SYMATTR InstName Q5
SYMATTR Value Si7850DP
SYMBOL cap -8960 -2720 R0
SYMATTR InstName C10
SYMATTR Value 1µ
SYMBOL ind -8768 -2816 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 24µ
SYMBOL schottky -8816 -2736 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value MBRS1100
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res -8640 -2512 R0
SYMATTR InstName R10
SYMATTR Value 80K
SYMBOL res -8640 -2384 R0
SYMATTR InstName R11
SYMATTR Value 1K
SYMBOL cap -8576 -2816 R0
WINDOW 39 29 72 Left 2
WINDOW 3 45 38 Left 2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 270µ
SYMATTR InstName C11
SYMBOL cap -9648 -2336 R0
WINDOW 39 24 92 Left 2
WINDOW 40 23 114 Left 2
SYMATTR InstName C12
SYMATTR Value 5p
SYMBOL cap -9616 -2560 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C13
SYMATTR Value 1000p
SYMBOL cap -9568 -2464 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
WINDOW 39 58 32 VTop 2
SYMATTR InstName C14
SYMATTR Value .01µ
SYMBOL PowerProducts\\LTC3810 -9328 -2640 R0
SYMATTR InstName U2
SYMBOL res -9760 -2256 R0
SYMATTR InstName R12
SYMATTR Value 200K
SYMBOL cap -9760 -2336 R0
SYMATTR InstName C15
SYMATTR Value 47p
SYMBOL res -9632 -2464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 10K
SYMBOL cap -8784 -3280 R0
SYMATTR InstName C16
SYMATTR Value 68µ
SYMBOL cap -9472 -3184 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C17
SYMATTR Value 100p
SYMBOL res -9792 -2816 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R14
SYMATTR Value 20.6K
SYMBOL res -9680 -2816 R0
SYMATTR InstName R15
SYMATTR Value 120K
SYMBOL res -9344 -3296 R0
SYMATTR InstName R16
SYMATTR Value 470K
SYMBOL res -9312 -3152 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R17
SYMATTR Value 120K
SYMBOL res -8432 -2832 R0
SYMATTR InstName RLoad1
SYMATTR Value 1K
SYMBOL PowerProducts\\LT1083 -7904 -2832 R0
SYMATTR InstName U3
SYMBOL cap -8192 -2800 R0
WINDOW 39 29 72 Left 2
WINDOW 3 45 38 Left 2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 100µ
SYMATTR InstName C18
SYMBOL cap -7712 -2800 R0
WINDOW 39 29 72 Left 2
WINDOW 3 45 38 Left 2
SYMATTR SpiceLine Rser=10m
SYMATTR Value 270µ
SYMATTR InstName C19
SYMBOL res -7520 -2816 R0
SYMATTR InstName R18
SYMATTR Value 1K
SYMBOL res -7520 -2688 R0
SYMATTR InstName R19
SYMATTR Value 60K
TEXT -9168 -3304 Bottom 2 ;LTC3810 - 100V Current Mode Synchronous Switching Regulator Controller\n36V to 72V Input Voltage to 12V @ 10A Buck Regulator\nInput: 36V-72V     Output: 12V @ 10A
TEXT -9800 -2136 Left 2 !.tran 20m startup