Version 4 SHEET 1 2076 1780 WIRE -1056 400 -1216 400 WIRE -784 400 -1056 400 WIRE -384 400 -784 400 WIRE 208 400 -384 400 WIRE -1056 416 -1056 400 WIRE -576 416 -640 416 WIRE -496 416 -576 416 WIRE -240 416 -496 416 WIRE 32 416 -240 416 WIRE -576 432 -576 416 WIRE -640 480 -640 416 WIRE 32 480 32 416 WIRE -784 496 -784 400 WIRE -384 496 -384 400 WIRE -240 496 -240 416 WIRE -96 496 -96 480 WIRE 208 496 208 400 WIRE -1056 512 -1056 496 WIRE -576 512 -576 496 WIRE -464 576 -736 576 WIRE 160 576 -16 576 WIRE -1216 656 -1216 400 WIRE -784 672 -784 592 WIRE -720 672 -784 672 WIRE -640 672 -640 544 WIRE -640 672 -656 672 WIRE -464 672 -640 672 WIRE 32 672 32 544 WIRE 32 672 -16 672 WIRE 96 672 32 672 WIRE 208 672 208 592 WIRE 208 672 160 672 WIRE -1024 768 -1040 768 WIRE -928 768 -944 768 WIRE -784 768 -784 672 WIRE -784 768 -928 768 WIRE -464 768 -784 768 WIRE 208 768 208 672 WIRE 208 768 -16 768 WIRE 352 768 208 768 WIRE 384 768 352 768 WIRE 480 768 464 768 WIRE -784 784 -784 768 WIRE 208 784 208 768 WIRE -928 816 -928 768 WIRE 352 816 352 768 WIRE -464 864 -736 864 WIRE 160 864 -16 864 WIRE 208 896 208 880 WIRE 352 896 352 880 WIRE -928 912 -928 880 WIRE -784 912 -784 880 WIRE -1040 960 -1040 768 WIRE -640 960 -1040 960 WIRE -464 960 -640 960 WIRE 32 960 -16 960 WIRE 480 960 480 768 WIRE 480 960 32 960 WIRE -640 976 -640 960 WIRE 32 976 32 960 WIRE -1040 1056 -1040 1040 WIRE -640 1056 -640 1040 WIRE -640 1056 -1040 1056 WIRE -464 1056 -640 1056 WIRE 32 1056 32 1040 WIRE 32 1056 -16 1056 WIRE 480 1056 480 1040 WIRE 480 1056 32 1056 WIRE -1040 1152 -1040 1056 WIRE -1040 1152 -1168 1152 WIRE -976 1152 -1040 1152 WIRE -816 1152 -896 1152 WIRE -464 1152 -816 1152 WIRE 272 1152 -16 1152 WIRE 352 1152 272 1152 WIRE 480 1152 480 1056 WIRE 480 1152 432 1152 WIRE 608 1152 480 1152 WIRE -1168 1168 -1168 1152 WIRE -1040 1168 -1040 1152 WIRE -816 1168 -816 1152 WIRE 272 1168 272 1152 WIRE 480 1168 480 1152 WIRE 608 1168 608 1152 WIRE -592 1248 -656 1248 WIRE -464 1248 -528 1248 WIRE 16 1248 -16 1248 WIRE 128 1248 80 1248 WIRE -1168 1264 -1168 1248 WIRE -1040 1264 -1040 1232 WIRE -816 1264 -816 1248 WIRE 272 1264 272 1248 WIRE 480 1264 480 1232 WIRE 608 1264 608 1248 WIRE -672 1344 -688 1344 WIRE -464 1344 -608 1344 WIRE 112 1344 -16 1344 WIRE 208 1344 176 1344 WIRE -496 1440 -496 416 WIRE -464 1440 -496 1440 WIRE 16 1440 -16 1440 WIRE -1216 1552 -1216 736 WIRE -464 1552 -1216 1552 WIRE 16 1552 -16 1552 WIRE 128 1552 80 1552 WIRE -384 1664 -384 1632 WIRE -240 1664 -240 1632 WIRE -96 1664 -96 1632 WIRE -240 1760 -240 1744 FLAG -384 1664 0 FLAG -96 1664 0 FLAG -576 512 0 FLAG -784 912 0 FLAG -928 912 0 FLAG -688 1344 0 FLAG -656 1248 0 FLAG -1040 1264 0 FLAG -816 1264 0 FLAG -1168 1152 OUT1 FLAG -1056 512 0 FLAG 208 896 0 FLAG 352 896 0 FLAG 208 1344 0 FLAG 128 1248 0 FLAG 480 1264 0 FLAG 272 1264 0 FLAG 608 1152 OUT2 FLAG -1168 1264 0 FLAG 608 1264 0 FLAG 128 1552 0 FLAG -240 1760 0 FLAG -1056 400 IN SYMBOL NMOS -736 496 M0 WINDOW 0 32 -11 Right 2 WINDOW 3 38 108 Right 2 SYMATTR InstName Q1 SYMATTR Value FDS6680A SYMBOL nmos -736 784 M0 WINDOW 0 -3 30 Right 2 WINDOW 3 22 101 Right 2 SYMATTR InstName Q2 SYMATTR Value FDS6680A SYMBOL cap -656 656 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL cap -592 432 R0 WINDOW 3 23 55 Left 2 SYMATTR Value 4.7µ SYMATTR InstName C2 SYMBOL schottky -944 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value MBRS140 SYMBOL ind -928 784 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 8µ SYMATTR SpiceLine Rpar=2K SYMBOL cap -656 976 R0 SYMATTR InstName C3 SYMATTR Value 1000p SYMBOL res -832 1152 R0 SYMATTR InstName R1 SYMATTR Value 20K SYMBOL res -880 1136 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 105K SYMBOL polcap -1056 1168 R0 SYMATTR SpiceLine Rser=0.05 SYMATTR InstName C4 SYMATTR Value 56µ SYMBOL cap -528 1232 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 60 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 220p SYMATTR SpiceLine Rser=15K SYMBOL cap -608 1328 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .0001µ SYMBOL VOLTAGE -1056 400 R0 SYMATTR InstName V1 SYMATTR Value 18 SYMBOL nmos 160 496 R0 SYMATTR InstName Q3 SYMATTR Value FDS6680A SYMBOL nmos 160 784 R0 SYMATTR InstName Q4 SYMATTR Value FDS6680A SYMBOL cap 96 656 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL res 464 944 R0 SYMATTR InstName R4 SYMATTR Value .015 SYMBOL cap 16 976 R0 SYMATTR InstName C8 SYMATTR Value 1000p SYMBOL res 256 1152 R0 SYMATTR InstName R5 SYMATTR Value 20K SYMBOL res 336 1136 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 280K SYMBOL polcap 464 1168 R0 SYMATTR SpiceLine Rser=0.065 SYMATTR InstName C9 SYMATTR Value 56µ SYMBOL cap 112 1360 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C11 SYMATTR Value .0001µ SYMBOL ind 368 784 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 15µ SYMATTR SpiceLine Rpar=2K SYMBOL res -1056 944 R0 WINDOW 0 39 44 Left 2 SYMATTR InstName R8 SYMATTR Value .015 SYMBOL RES -1232 640 R0 SYMATTR InstName R9 SYMATTR Value 10K SYMBOL schottky 336 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value MBRS140 SYMBOL schottky -656 480 R0 SYMATTR InstName D3 SYMATTR Value MBRS140 SYMBOL schottky 16 480 R0 SYMATTR InstName D4 SYMATTR Value MBRS140 SYMBOL cap 80 1536 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 60 32 VTop 2 SYMATTR InstName C12 SYMATTR Value .01µ SYMATTR SpiceLine Rser=10K SYMBOL voltage -240 1648 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value SINE(.8 .8 300K) SYMBOL PowerProducts\\LTC3727LX-1 -240 960 R0 SYMATTR InstName U1 SYMBOL cap 80 1232 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 60 32 VTop 2 SYMATTR InstName C10 SYMATTR Value 220p SYMATTR SpiceLine Rser=15K SYMBOL RES -1184 1152 R0 SYMATTR InstName Rload1 SYMATTR Value 1 SYMBOL res 592 1152 R0 SYMATTR InstName Rload2 SYMATTR Value 2.4 TEXT 320 1392 Left 2 !.tran 800u startup