Version 4 SHEET 1 1312 1700 WIRE -768 400 -880 400 WIRE -384 400 -768 400 WIRE 240 400 -384 400 WIRE -880 416 -880 400 WIRE -576 416 -640 416 WIRE -240 416 -576 416 WIRE 32 416 -240 416 WIRE -640 432 -640 416 WIRE 32 432 32 416 WIRE -576 480 -576 416 WIRE -768 496 -768 400 WIRE -384 496 -384 400 WIRE -240 496 -240 416 WIRE -96 496 -96 480 WIRE 240 496 240 400 WIRE -880 512 -880 496 WIRE -640 512 -640 496 WIRE -464 576 -720 576 WIRE 192 576 -16 576 WIRE -768 672 -768 592 WIRE -720 672 -768 672 WIRE -576 672 -576 544 WIRE -576 672 -656 672 WIRE -464 672 -576 672 WIRE 32 672 32 496 WIRE 32 672 -16 672 WIRE 128 672 32 672 WIRE 240 672 240 592 WIRE 240 672 192 672 WIRE -1008 768 -1040 768 WIRE -896 768 -928 768 WIRE -768 768 -768 672 WIRE -768 768 -896 768 WIRE -464 768 -768 768 WIRE 240 768 240 672 WIRE 240 768 -16 768 WIRE 384 768 240 768 WIRE 432 768 384 768 WIRE 560 768 512 768 WIRE -768 784 -768 768 WIRE 240 784 240 768 WIRE -896 816 -896 768 WIRE 384 816 384 768 WIRE -464 864 -720 864 WIRE 192 864 -16 864 WIRE -768 896 -768 880 WIRE -896 912 -896 880 WIRE 240 912 240 880 WIRE 384 912 384 880 WIRE -1040 960 -1040 768 WIRE -640 960 -1040 960 WIRE -464 960 -640 960 WIRE 96 960 -16 960 WIRE 560 960 560 768 WIRE 560 960 96 960 WIRE -640 976 -640 960 WIRE 96 976 96 960 WIRE -1040 1056 -1040 1040 WIRE -640 1056 -640 1040 WIRE -640 1056 -1040 1056 WIRE -464 1056 -640 1056 WIRE 96 1056 96 1040 WIRE 96 1056 -16 1056 WIRE 560 1056 560 1040 WIRE 560 1056 96 1056 WIRE -1040 1152 -1040 1056 WIRE -1040 1152 -1168 1152 WIRE -944 1152 -1040 1152 WIRE -816 1152 -864 1152 WIRE -464 1152 -816 1152 WIRE 256 1152 -16 1152 WIRE 336 1152 256 1152 WIRE 560 1152 560 1056 WIRE 560 1152 416 1152 WIRE 688 1152 560 1152 WIRE -1168 1168 -1168 1152 WIRE -1040 1168 -1040 1152 WIRE -816 1168 -816 1152 WIRE 256 1168 256 1152 WIRE 560 1168 560 1152 WIRE 688 1168 688 1152 WIRE -640 1248 -656 1248 WIRE -544 1248 -560 1248 WIRE -464 1248 -480 1248 WIRE 16 1248 -16 1248 WIRE 112 1248 80 1248 WIRE 208 1248 192 1248 WIRE -1168 1264 -1168 1248 WIRE -1040 1264 -1040 1232 WIRE -816 1264 -816 1248 WIRE 256 1264 256 1248 WIRE 560 1264 560 1232 WIRE 688 1264 688 1248 WIRE -592 1344 -656 1344 WIRE -464 1344 -528 1344 WIRE 0 1344 -16 1344 WIRE 96 1344 64 1344 WIRE -464 1440 -480 1440 WIRE 0 1440 -16 1440 WIRE -464 1552 -480 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 -640 512 0 FLAG -768 896 0 FLAG -896 912 0 FLAG -656 1344 0 FLAG -656 1248 0 FLAG -1040 1264 0 FLAG -816 1264 0 FLAG -1168 1152 OUT1 FLAG -880 512 0 FLAG 240 912 0 FLAG 384 912 0 FLAG 96 1344 0 FLAG 208 1248 0 FLAG 560 1264 0 FLAG 256 1264 0 FLAG 688 1152 OUT2 FLAG -1168 1264 0 FLAG 688 1264 0 FLAG -880 400 IN SYMBOL NMOS -720 496 M0 WINDOW 0 34 -12 Right 2 WINDOW 3 33 102 Right 2 SYMATTR InstName Q1 SYMATTR Value FDS6680A SYMBOL nmos -720 784 M0 WINDOW 0 -12 36 Right 2 WINDOW 3 21 105 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 -656 432 R0 SYMATTR InstName C2 SYMATTR Value 1µ SYMBOL ind -912 784 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 -656 976 R0 SYMATTR InstName C3 SYMATTR Value 1000p SYMBOL res -832 1152 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 -1056 1168 R0 SYMATTR InstName C4 SYMATTR Value 100µ SYMATTR SpiceLine Rser=75m 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 -528 1328 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C6 SYMATTR Value .005µ 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 -880 400 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 res 544 944 R0 SYMATTR InstName R4 SYMATTR Value .01 SYMBOL cap 80 976 R0 SYMATTR InstName C8 SYMATTR Value 1000p SYMBOL res 240 1152 R0 SYMATTR InstName R5 SYMATTR Value 20K SYMBOL res 320 1136 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 63.4K SYMBOL cap 544 1168 R0 SYMATTR InstName C9 SYMATTR Value 47µ SYMATTR SpiceLine Rser=2m 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 0 1360 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName C11 SYMATTR Value .005µ SYMBOL res 96 1264 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R7 SYMATTR Value 15K SYMBOL ind 416 784 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 -1056 944 R0 SYMATTR InstName R8 SYMATTR Value .01 SYMBOL POWERPRODUCTS\\LTC1628 -240 960 R0 WINDOW 0 8 -480 Left 2 WINDOW 3 0 144 Center 2 SYMATTR InstName U1 SYMBOL schottky 368 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky -912 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 -7 Left 2 SYMATTR InstName D2 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky 16 432 R0 SYMATTR InstName D3 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky -592 480 R0 SYMATTR InstName D4 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL RES -1184 1152 R0 SYMATTR InstName Rload1 SYMATTR Value 10 SYMBOL res 672 1152 R0 SYMATTR InstName Rload2 SYMATTR Value 2 TEXT 256 1384 Left 2 !.tran 7m startup