Version 4
SHEET 1 1672 1704
WIRE -1024 400 -1200 400
WIRE -752 400 -1024 400
WIRE -384 400 -752 400
WIRE 240 400 -384 400
WIRE -1024 416 -1024 400
WIRE -496 416 -608 416
WIRE -240 416 -496 416
WIRE 16 416 -240 416
WIRE 128 416 16 416
WIRE 128 432 128 416
WIRE -608 480 -608 416
WIRE 16 480 16 416
WIRE -752 496 -752 400
WIRE -384 496 -384 400
WIRE -240 496 -240 416
WIRE 240 496 240 400
WIRE -1024 512 -1024 496
WIRE 128 512 128 496
WIRE -464 576 -704 576
WIRE 192 576 -16 576
WIRE -1200 656 -1200 400
WIRE -752 672 -752 592
WIRE -704 672 -752 672
WIRE -608 672 -608 544
WIRE -608 672 -640 672
WIRE -464 672 -608 672
WIRE 16 672 16 544
WIRE 16 672 -16 672
WIRE 128 672 16 672
WIRE 240 672 240 592
WIRE 240 672 192 672
WIRE -992 768 -1024 768
WIRE -864 768 -912 768
WIRE -752 768 -752 672
WIRE -752 768 -864 768
WIRE -464 768 -752 768
WIRE 240 768 240 672
WIRE 240 768 -16 768
WIRE 384 768 240 768
WIRE 416 768 384 768
WIRE 544 768 496 768
WIRE -752 784 -752 768
WIRE 240 784 240 768
WIRE -864 816 -864 768
WIRE 384 816 384 768
WIRE -464 864 -704 864
WIRE 192 864 -16 864
WIRE -864 896 -864 880
WIRE -752 896 -752 880
WIRE 240 912 240 880
WIRE 384 912 384 880
WIRE -1024 960 -1024 768
WIRE -688 960 -1024 960
WIRE -464 960 -688 960
WIRE 96 960 -16 960
WIRE 544 960 544 768
WIRE 544 960 96 960
WIRE -688 976 -688 960
WIRE 96 976 96 960
WIRE -1024 1056 -1024 1040
WIRE -688 1056 -688 1040
WIRE -688 1056 -1024 1056
WIRE -464 1056 -688 1056
WIRE 96 1056 96 1040
WIRE 96 1056 -16 1056
WIRE 544 1056 544 1040
WIRE 544 1056 96 1056
WIRE -1024 1152 -1024 1056
WIRE -1024 1152 -1152 1152
WIRE -960 1152 -1024 1152
WIRE -848 1152 -880 1152
WIRE -464 1152 -848 1152
WIRE 336 1152 -16 1152
WIRE 400 1152 336 1152
WIRE 544 1152 544 1056
WIRE 544 1152 480 1152
WIRE 672 1152 544 1152
WIRE -1152 1168 -1152 1152
WIRE -1024 1168 -1024 1152
WIRE -848 1168 -848 1152
WIRE 336 1168 336 1152
WIRE 544 1168 544 1152
WIRE 672 1168 672 1152
WIRE -672 1248 -688 1248
WIRE -576 1248 -592 1248
WIRE -464 1248 -512 1248
WIRE 0 1248 -16 1248
WIRE 96 1248 64 1248
WIRE 192 1248 176 1248
WIRE -1152 1264 -1152 1248
WIRE -1024 1264 -1024 1232
WIRE -848 1264 -848 1248
WIRE 336 1264 336 1248
WIRE 544 1264 544 1232
WIRE 672 1264 672 1248
WIRE -608 1344 -704 1344
WIRE -464 1344 -544 1344
WIRE 48 1344 -16 1344
WIRE 144 1344 112 1344
WIRE -496 1440 -496 416
WIRE -464 1440 -496 1440
WIRE 16 1440 -16 1440
WIRE -1200 1552 -1200 736
WIRE -464 1552 -1200 1552
WIRE 16 1552 -16 1552
WIRE -384 1648 -384 1632
WIRE -240 1648 -240 1632
WIRE -96 1648 -96 1632
FLAG -240 1648 0
FLAG -96 1648 0
FLAG 128 512 0
FLAG -752 896 0
FLAG -864 896 0
FLAG -704 1344 0
FLAG -688 1248 0
FLAG -1024 1264 0
FLAG -848 1264 0
FLAG -1152 1152 OUT1
FLAG -1024 512 0
FLAG 240 912 0
FLAG 384 912 0
FLAG 144 1344 0
FLAG 192 1248 0
FLAG 544 1264 0
FLAG 336 1264 0
FLAG 672 1152 OUT2
FLAG -1152 1264 0
FLAG 672 1264 0
FLAG -384 1648 0
FLAG -1024 400 IN
SYMBOL NMOS -704 496 M0
WINDOW 0 34 -4 Right 2
WINDOW 3 36 103 Right 2
SYMATTR InstName Q1
SYMATTR Value FDS6680A
SYMBOL nmos -704 784 M0
WINDOW 0 -7 24 Right 2
WINDOW 3 24 101 Right 2
SYMATTR InstName Q2
SYMATTR Value FDS6680A
SYMBOL cap -640 656 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL schottky -624 480 R0
SYMATTR InstName D1
SYMATTR Value 1N5817
SYMBOL cap 112 432 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL schottky -880 880 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMBOL ind -896 784 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 6.3µ
SYMATTR SpiceLine Rpar=2K
SYMBOL cap -704 976 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res -864 1152 R0
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL res -864 1136 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 105K
SYMBOL cap -1040 1168 R0
SYMATTR InstName C4
SYMATTR Value 47µ
SYMATTR SpiceLine Rser=50m
SYMBOL cap -512 1232 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 220p
SYMBOL cap -544 1328 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value .002µ
SYMBOL res -576 1232 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 15K
SYMBOL VOLTAGE -1024 400 R0
SYMATTR InstName V1
SYMATTR Value 7
SYMBOL nmos 192 496 R0
SYMATTR InstName Q3
SYMATTR Value FDS6680A
SYMBOL nmos 192 784 R0
SYMATTR InstName Q4
SYMATTR Value FDS6680A
SYMBOL cap 128 656 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C7
SYMATTR Value .1µ
SYMBOL schottky 0 480 R0
SYMATTR InstName D3
SYMATTR Value 1N5817
SYMBOL schottky 368 880 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value 1N5817
SYMBOL res 528 944 R0
SYMATTR InstName R4
SYMATTR Value .01
SYMBOL cap 80 976 R0
SYMATTR InstName C8
SYMATTR Value 1000p
SYMBOL res 320 1152 R0
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 384 1136 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 63.4K
SYMBOL cap 528 1168 R0
SYMATTR InstName C9
SYMATTR Value 47µ
SYMATTR SpiceLine Rser=50m
SYMBOL cap 0 1264 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C10
SYMATTR Value 220p
SYMBOL cap 48 1360 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C11
SYMATTR Value .002µ
SYMBOL res 80 1264 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R7
SYMATTR Value 15K
SYMBOL ind 400 784 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 6.3µ
SYMATTR SpiceLine Rpar=2K
SYMBOL res -1040 944 R0
SYMATTR InstName R8
SYMATTR Value .01
SYMBOL RES -1216 640 R0
SYMATTR InstName R9
SYMATTR Value 10K
SYMBOL POWERPRODUCTS\\LTC3728 -240 960 R0
SYMATTR InstName U1
SYMBOL res 656 1152 R0
SYMATTR InstName Rload2
SYMATTR Value 100
SYMBOL RES -1168 1152 R0
SYMATTR InstName Rload1
SYMATTR Value 100
TEXT 128 1496 Left 2 !.tran 3m startup