Version 4 SHEET 1 1312 1700 WIRE -1024 384 -1184 384 WIRE -752 384 -1024 384 WIRE -384 384 -752 384 WIRE 192 384 -384 384 WIRE -1024 400 -1024 384 WIRE -496 400 -592 400 WIRE -240 400 -496 400 WIRE 32 400 -240 400 WIRE -496 416 -496 400 WIRE 32 432 32 400 WIRE -592 480 -592 400 WIRE -1024 496 -1024 480 WIRE -752 496 -752 384 WIRE -496 496 -496 480 WIRE -384 496 -384 384 WIRE -240 496 -240 400 WIRE -96 496 -96 480 WIRE 192 496 192 384 WIRE -464 576 -704 576 WIRE 144 576 -16 576 WIRE -1184 672 -1184 384 WIRE -752 672 -752 592 WIRE -704 672 -752 672 WIRE -592 672 -592 544 WIRE -592 672 -640 672 WIRE -464 672 -592 672 WIRE 32 672 32 496 WIRE 32 672 -16 672 WIRE 80 672 32 672 WIRE 192 672 192 592 WIRE 192 672 144 672 WIRE -976 768 -1008 768 WIRE -864 768 -896 768 WIRE -752 768 -752 672 WIRE -752 768 -864 768 WIRE -464 768 -752 768 WIRE 192 768 192 672 WIRE 192 768 -16 768 WIRE 336 768 192 768 WIRE 400 768 336 768 WIRE 512 768 480 768 WIRE -752 784 -752 768 WIRE 192 784 192 768 WIRE -864 800 -864 768 WIRE 336 816 336 768 WIRE -464 864 -704 864 WIRE 144 864 -16 864 WIRE -864 896 -864 864 WIRE -752 896 -752 880 WIRE 192 912 192 880 WIRE 336 912 336 880 WIRE -1008 960 -1008 768 WIRE -624 960 -1008 960 WIRE -464 960 -624 960 WIRE 48 960 -16 960 WIRE 512 960 512 768 WIRE 512 960 48 960 WIRE -624 976 -624 960 WIRE 48 976 48 960 WIRE -1008 1056 -1008 1040 WIRE -624 1056 -624 1040 WIRE -624 1056 -1008 1056 WIRE -464 1056 -624 1056 WIRE 48 1056 48 1040 WIRE 48 1056 -16 1056 WIRE 512 1056 512 1040 WIRE 512 1056 48 1056 WIRE -1008 1152 -1008 1056 WIRE -1008 1152 -1136 1152 WIRE -944 1152 -1008 1152 WIRE -816 1152 -864 1152 WIRE -464 1152 -816 1152 WIRE 288 1152 -16 1152 WIRE 352 1152 288 1152 WIRE 512 1152 512 1056 WIRE 512 1152 432 1152 WIRE 608 1152 512 1152 WIRE 288 1168 288 1152 WIRE 608 1168 608 1152 WIRE -1136 1184 -1136 1152 WIRE -1008 1184 -1008 1152 WIRE -816 1184 -816 1152 WIRE 512 1184 512 1152 WIRE -640 1248 -656 1248 WIRE -544 1248 -560 1248 WIRE -464 1248 -480 1248 WIRE 16 1248 -16 1248 WIRE 96 1248 80 1248 WIRE 192 1248 176 1248 WIRE 288 1264 288 1248 WIRE 512 1264 512 1248 WIRE 608 1264 608 1248 WIRE -1136 1280 -1136 1264 WIRE -1008 1280 -1008 1248 WIRE -816 1280 -816 1264 WIRE -576 1344 -640 1344 WIRE -464 1344 -512 1344 WIRE 64 1344 -16 1344 WIRE 160 1344 128 1344 WIRE -464 1440 -480 1440 WIRE 0 1440 -16 1440 WIRE -1184 1552 -1184 752 WIRE -464 1552 -1184 1552 WIRE 0 1552 -16 1552 WIRE -384 1648 -384 1632 WIRE -240 1648 -240 1632 WIRE -96 1648 -96 1632 FLAG -384 1648 0 FLAG -96 1648 0 FLAG -496 496 0 FLAG -752 896 0 FLAG -864 896 0 FLAG -640 1344 0 FLAG -656 1248 0 FLAG -1008 1280 0 FLAG -816 1280 0 FLAG -1136 1152 OUT1 FLAG -1024 496 0 FLAG 192 912 0 FLAG 336 912 0 FLAG 160 1344 0 FLAG 192 1248 0 FLAG 512 1264 0 FLAG 288 1264 0 FLAG 608 1152 OUT2 FLAG -1136 1280 0 FLAG 608 1264 0 FLAG -1024 384 IN SYMBOL NMOS -704 496 M0 WINDOW 0 31 -12 Right 2 WINDOW 3 36 107 Right 2 SYMATTR InstName Q1 SYMATTR Value FDS6680A SYMBOL nmos -704 784 M0 WINDOW 0 -6 21 Right 2 WINDOW 3 31 100 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 diode -608 480 R0 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMBOL cap -512 416 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL ind -880 784 M270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 6.3µ SYMATTR SpiceLine Rpar=10000 SYMBOL cap -640 976 R0 SYMATTR InstName C3 SYMATTR Value 1000p SYMBOL res -832 1168 R0 SYMATTR InstName R1 SYMATTR Value 20K SYMBOL res -848 1136 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 105K SYMBOL cap -1024 1184 R0 SYMATTR InstName C4 SYMATTR Value 47µ SYMATTR SpiceLine Rser=50m SYMBOL cap -480 1232 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value 220p SYMBOL cap -512 1328 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .001µ SYMBOL res -544 1232 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 15K SYMBOL VOLTAGE -1024 384 R0 SYMATTR InstName V1 SYMATTR Value 7 SYMBOL nmos 144 496 R0 SYMATTR InstName Q3 SYMATTR Value FDS6680A SYMBOL nmos 144 784 R0 SYMATTR InstName Q4 SYMATTR Value FDS6680A SYMBOL cap 80 656 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL diode 16 432 R0 SYMATTR InstName D2 SYMATTR Value 1N5817 SYMBOL res 496 944 R0 SYMATTR InstName R4 SYMATTR Value .01 SYMBOL cap 32 976 R0 SYMATTR InstName C8 SYMATTR Value 1000p SYMBOL res 272 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 63.4K SYMBOL cap 496 1184 R0 SYMATTR InstName C9 SYMATTR Value 47µ SYMATTR SpiceLine Rser=50m SYMBOL cap 16 1264 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C10 SYMATTR Value 220p SYMBOL cap 64 1360 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C11 SYMATTR Value .001µ 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 384 784 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 6.3µ SYMATTR SpiceLine Rpar=10000 SYMBOL res -1024 944 R0 SYMATTR InstName R8 SYMATTR Value .01 SYMBOL RES -1200 656 R0 SYMATTR InstName R9 SYMATTR Value 10K SYMBOL POWERPRODUCTS\\LTC1628-PG -240 960 R0 WINDOW 0 8 -480 Left 2 WINDOW 3 0 144 Center 2 SYMATTR InstName U1 SYMBOL schottky 320 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D3 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky -880 864 M180 WINDOW 0 24 72 Left 2 WINDOW 3 28 -11 Left 2 SYMATTR InstName D4 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL RES -1152 1168 R0 SYMATTR InstName Rload1 SYMATTR Value 2 SYMBOL res 592 1152 R0 SYMATTR InstName Rload2 SYMATTR Value 1 TEXT 304 1408 Left 2 !.tran 2m startup