Version 4 SHEET 1 1356 2464 WIRE -544 464 -640 464 WIRE -240 464 -544 464 WIRE 16 464 -240 464 WIRE 144 464 16 464 WIRE 288 464 144 464 WIRE 400 464 288 464 WIRE 480 464 400 464 WIRE 576 464 480 464 WIRE -640 480 -640 464 WIRE -544 480 -544 464 WIRE 16 480 16 464 WIRE 144 480 144 464 WIRE 288 480 288 464 WIRE 576 496 576 464 WIRE -240 544 -240 464 WIRE -640 576 -640 560 WIRE -544 576 -544 560 WIRE -464 576 -544 576 WIRE 528 576 -16 576 WIRE 288 672 288 544 WIRE 288 672 -16 672 WIRE 320 672 288 672 WIRE 576 672 576 592 WIRE 576 672 384 672 WIRE -464 768 -496 768 WIRE 576 768 576 672 WIRE 576 768 -16 768 WIRE 720 768 576 768 WIRE 768 768 720 768 WIRE 880 768 848 768 WIRE 896 768 880 768 WIRE 992 768 976 768 WIRE 576 784 576 768 WIRE 720 816 720 768 WIRE -464 864 -496 864 WIRE 528 864 -16 864 WIRE 576 912 576 880 WIRE 720 912 720 880 WIRE 48 960 -16 960 WIRE 880 960 880 768 WIRE 880 960 48 960 WIRE 48 976 48 960 WIRE 48 1056 48 1040 WIRE 48 1056 -16 1056 WIRE 992 1056 992 768 WIRE 992 1056 48 1056 WIRE 480 1072 480 464 WIRE 432 1152 -16 1152 WIRE 144 1248 144 544 WIRE 144 1248 -16 1248 WIRE 272 1248 144 1248 WIRE 480 1248 480 1168 WIRE 480 1248 336 1248 WIRE 480 1344 480 1248 WIRE 480 1344 -16 1344 WIRE 624 1344 480 1344 WIRE 768 1344 624 1344 WIRE 880 1344 848 1344 WIRE 896 1344 880 1344 WIRE 992 1344 992 1056 WIRE 992 1344 976 1344 WIRE 480 1360 480 1344 WIRE 624 1392 624 1344 WIRE 432 1440 -16 1440 WIRE 480 1488 480 1456 WIRE 624 1488 624 1456 WIRE -464 1536 -496 1536 WIRE 48 1536 -16 1536 WIRE 880 1536 880 1344 WIRE 880 1536 48 1536 WIRE 48 1552 48 1536 WIRE -640 1632 -656 1632 WIRE -560 1632 -576 1632 WIRE -464 1632 -480 1632 WIRE 48 1632 48 1616 WIRE 48 1632 -16 1632 WIRE 992 1632 992 1344 WIRE 992 1632 48 1632 WIRE 400 1648 400 464 WIRE -544 1728 -560 1728 WIRE -464 1728 -480 1728 WIRE 352 1728 -16 1728 WIRE -464 1824 -496 1824 WIRE 16 1824 16 544 WIRE 16 1824 -16 1824 WIRE 160 1824 16 1824 WIRE 400 1824 400 1744 WIRE 400 1824 224 1824 WIRE -544 1920 -672 1920 WIRE -464 1920 -544 1920 WIRE 400 1920 400 1824 WIRE 400 1920 -16 1920 WIRE 528 1920 400 1920 WIRE 768 1920 528 1920 WIRE 880 1920 848 1920 WIRE 896 1920 880 1920 WIRE 992 1920 992 1632 WIRE 992 1920 976 1920 WIRE -544 1936 -544 1920 WIRE 400 1936 400 1920 WIRE 528 1968 528 1920 WIRE -768 2016 -800 2016 WIRE -672 2016 -672 1920 WIRE -672 2016 -688 2016 WIRE -656 2016 -672 2016 WIRE -544 2016 -544 2000 WIRE -544 2016 -576 2016 WIRE -464 2016 -544 2016 WIRE 352 2016 -16 2016 WIRE 400 2064 400 2032 WIRE 528 2064 528 2032 WIRE -464 2112 -544 2112 WIRE 48 2112 -16 2112 WIRE 880 2112 880 1920 WIRE 880 2112 48 2112 WIRE 48 2128 48 2112 WIRE -464 2208 -496 2208 WIRE 48 2208 48 2192 WIRE 48 2208 -16 2208 WIRE 992 2208 992 1920 WIRE 992 2208 48 2208 WIRE -240 2256 -240 2240 WIRE -496 2288 -496 2208 WIRE 992 2288 992 2208 WIRE 992 2288 -496 2288 WIRE 1120 2288 992 2288 WIRE 992 2304 992 2288 WIRE 1120 2304 1120 2288 WIRE -544 2384 -544 2112 WIRE 992 2384 992 2368 WIRE 992 2384 -544 2384 WIRE 992 2400 992 2384 WIRE 1120 2400 1120 2384 FLAG -656 1632 0 FLAG -240 2256 0 FLAG -640 576 0 FLAG 576 912 0 FLAG 720 912 0 FLAG 480 1488 0 FLAG 624 1488 0 FLAG 400 2064 0 FLAG 528 2064 0 FLAG 992 2400 0 FLAG 1120 2400 0 FLAG -800 2016 0 FLAG 1120 2288 OUT FLAG -496 1824 0 FLAG -560 1728 0 FLAG -640 464 IN SYMBOL VOLTAGE -640 464 R0 SYMATTR InstName V1 SYMATTR Value 6 SYMBOL NMOS 528 496 R0 SYMATTR InstName Q1 SYMATTR Value Si4866DY SYMBOL nmos 528 784 R0 SYMATTR InstName Q2 SYMATTR Value Si4866DY SYMBOL cap 320 656 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL schottky 272 480 R0 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMBOL schottky 704 880 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N5817 SYMBOL RES 880 752 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value .003 SYMBOL cap 32 976 R0 SYMATTR InstName C2 SYMATTR Value 1000p SYMBOL ind 752 784 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 1µ SYMBOL RES -560 464 R0 SYMATTR InstName R2 SYMATTR Value 10K SYMBOL nmos 432 1072 R0 SYMATTR InstName Q3 SYMATTR Value Si4866DY SYMBOL nmos 432 1360 R0 SYMATTR InstName Q4 SYMATTR Value Si4866DY SYMBOL cap 272 1232 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value .1µ SYMBOL schottky 128 480 R0 SYMATTR InstName D3 SYMATTR Value 1N5817 SYMBOL schottky 608 1456 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D4 SYMATTR Value 1N5817 SYMBOL res 880 1328 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value .003 SYMBOL cap 32 1552 R0 SYMATTR InstName C4 SYMATTR Value 1000p SYMBOL ind 752 1360 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L2 SYMATTR Value 1µ SYMBOL nmos 352 1648 R0 SYMATTR InstName Q5 SYMATTR Value Si4866DY SYMBOL nmos 352 1936 R0 SYMATTR InstName Q6 SYMATTR Value Si4866DY SYMBOL cap 160 1808 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value .1µ SYMBOL schottky 512 2032 M180 WINDOW 0 24 72 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D5 SYMATTR Value 1N5817 SYMBOL res 880 1904 M90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value .003 SYMBOL ind 752 1936 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L3 SYMATTR Value 1µ SYMBOL schottky 0 480 R0 SYMATTR InstName D6 SYMATTR Value 1N5817 SYMBOL cap 32 2128 R0 SYMATTR InstName C6 SYMATTR Value 1000p SYMBOL polcap 976 2304 R0 SYMATTR InstName C7 SYMATTR Value 480µ SYMATTR SpiceLine Rser=.01 SYMBOL cap -560 1936 R0 SYMATTR InstName C8 SYMATTR Value 100p SYMBOL cap -480 1712 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C9 SYMATTR Value 100p SYMBOL cap -576 1616 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C10 SYMATTR Value 680p SYMBOL res -464 1616 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 5K SYMBOL PowerProducts\\LTC3731 -240 1392 R0 SYMATTR InstName U1 SYMBOL res -672 2032 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 7.5K SYMBOL res -784 2032 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R7 SYMATTR Value 6.04K SYMBOL res 1104 2288 R0 SYMATTR InstName Rload SYMATTR Value .1 TEXT 624 2336 Left 2 !.tran 300u startup