Version 4 SHEET 1 7140 9728 WIRE 4016 1360 3888 1360 WIRE 4176 1360 4080 1360 WIRE 4672 1360 4176 1360 WIRE 4768 1360 4672 1360 WIRE 3888 1376 3888 1360 WIRE 4176 1376 4176 1360 WIRE 4768 1408 4768 1360 WIRE 4176 1456 4176 1440 WIRE 3888 1472 3888 1456 WIRE 3968 1472 3888 1472 WIRE 3968 1488 3968 1472 WIRE 3376 1520 3296 1520 WIRE 3840 1520 3376 1520 WIRE 4416 1520 3888 1520 WIRE 4464 1520 4416 1520 WIRE 4480 1520 4464 1520 WIRE 4576 1520 4560 1520 WIRE 4944 1520 4576 1520 WIRE 4992 1520 4944 1520 WIRE 3296 1536 3296 1520 WIRE 3840 1536 3840 1520 WIRE 3888 1536 3888 1520 WIRE 4576 1536 4576 1520 WIRE 4992 1536 4992 1520 WIRE 4672 1568 4672 1360 WIRE 4576 1616 4576 1600 WIRE 4768 1616 4768 1488 WIRE 4768 1616 4736 1616 WIRE 3296 1632 3296 1616 WIRE 3840 1632 3840 1616 WIRE 3840 1632 3760 1632 WIRE 3888 1632 3888 1616 WIRE 3968 1632 3888 1632 WIRE 4768 1632 4768 1616 WIRE 4992 1632 4992 1616 WIRE 3968 1648 3968 1632 WIRE 4464 1680 4464 1520 WIRE 3712 1712 3696 1712 WIRE 4768 1712 4768 1696 WIRE 3376 1728 3376 1520 WIRE 3376 1728 3280 1728 WIRE 3552 1728 3376 1728 WIRE 4288 1728 4016 1728 WIRE 3552 1744 3552 1728 WIRE 3760 1744 3760 1728 WIRE 3840 1744 3760 1744 WIRE 3376 1760 3376 1728 WIRE 3760 1760 3760 1744 WIRE 4544 1760 4512 1760 WIRE 4672 1760 4672 1664 WIRE 4784 1760 4672 1760 WIRE 3280 1776 3280 1728 WIRE 3968 1776 3968 1744 WIRE 4176 1776 3968 1776 WIRE 4784 1776 4784 1760 WIRE 3968 1792 3968 1776 WIRE 4288 1824 4288 1728 WIRE 4416 1824 4416 1520 WIRE 4544 1824 4544 1760 WIRE 4672 1824 4672 1760 WIRE 3552 1840 3552 1824 WIRE 3552 1840 3424 1840 WIRE 3760 1856 3760 1840 WIRE 4784 1856 4784 1840 WIRE 4944 1872 4944 1520 WIRE 3552 1888 3552 1840 WIRE 3696 1888 3696 1712 WIRE 3840 1888 3840 1744 WIRE 3968 1888 3968 1872 WIRE 4144 1888 3968 1888 WIRE 3968 1904 3968 1888 WIRE 4176 1904 4176 1776 WIRE 4208 1904 4176 1904 WIRE 4784 1904 4752 1904 WIRE 3280 1968 3280 1856 WIRE 3440 1968 3280 1968 WIRE 4144 1968 4144 1888 WIRE 4208 1968 4144 1968 WIRE 4944 1968 4944 1952 WIRE 4944 1968 4752 1968 WIRE 3280 1984 3280 1968 WIRE 4944 1984 4944 1968 WIRE 4032 2000 3936 2000 WIRE 4192 2000 4080 2000 WIRE 4032 2032 4032 2000 WIRE 4080 2032 4080 2000 WIRE 4192 2032 4192 2000 WIRE 4208 2032 4192 2032 WIRE 4800 2032 4752 2032 WIRE 4896 2032 4864 2032 WIRE 3280 2080 3280 2064 WIRE 3376 2080 3376 1856 WIRE 3440 2080 3376 2080 WIRE 4944 2080 4944 2064 WIRE 4208 2096 4192 2096 WIRE 4800 2096 4752 2096 WIRE 4800 2112 4800 2096 WIRE 4080 2144 4080 2112 WIRE 4128 2144 4080 2144 WIRE 4192 2144 4192 2096 WIRE 3376 2160 3376 2144 WIRE 4032 2160 4032 2112 WIRE 4032 2160 3936 2160 WIRE 4032 2176 4032 2160 WIRE 3440 2192 3360 2192 WIRE 4800 2192 4800 2176 WIRE 3360 2208 3360 2192 WIRE 4288 2208 4288 2176 WIRE 4416 2208 4416 2176 WIRE 4544 2208 4544 2176 WIRE 4672 2208 4672 2176 WIRE 4032 2272 4032 2256 WIRE 3360 2304 3360 2272 WIRE 3552 2304 3552 2272 WIRE 3696 2304 3696 2272 WIRE 3840 2304 3840 2272 FLAG 3296 1632 0 FLAG 3552 2304 0 FLAG 3696 2304 0 FLAG 3840 2304 0 FLAG 3360 2304 0 FLAG 4032 2272 0 FLAG 3280 2080 0 FLAG 3376 2160 0 FLAG 4288 2208 0 FLAG 4416 2208 0 FLAG 4672 2208 0 FLAG 4800 2192 0 FLAG 4896 2032 0 FLAG 4944 2080 0 FLAG 4784 1904 0 FLAG 4544 2208 0 FLAG 3760 1856 0 FLAG 3968 1904 0 FLAG 4464 1776 0 FLAG 4576 1616 0 FLAG 4992 1632 0 FLAG 3968 1488 0 FLAG 4176 1456 0 FLAG 4768 1712 0 FLAG 4784 1856 0 FLAG 3296 1520 IN FLAG 4992 1520 OUT SYMBOL ind2 4096 2016 M0 WINDOW 0 -2 41 Right 2 WINDOW 3 0 75 Right 2 SYMATTR InstName L1 SYMATTR Value 300µ SYMATTR Type ind SYMATTR SpiceLine Rser=.38 SYMBOL ind2 4016 2016 R0 WINDOW 0 -1 41 Right 2 WINDOW 3 -1 74 Right 2 SYMATTR InstName L2 SYMATTR Value 1200µ SYMATTR Type ind SYMATTR SpiceLine Rser=.91 SYMBOL cap 4192 2128 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 34 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL PowerProducts\\LTC3725 3696 2080 R0 SYMATTR InstName U1 SYMBOL cap 3344 2208 R0 SYMATTR InstName C6 SYMATTR Value .001µ SYMBOL res 4016 2160 R0 SYMATTR InstName R1 SYMATTR Value 162K SYMBOL res 3536 1728 R0 SYMATTR InstName R2 SYMATTR Value 100K SYMBOL res 3264 1760 R0 SYMATTR InstName R3 SYMATTR Value 365K SYMBOL res 3264 1968 R0 WINDOW 3 33 79 Left 2 SYMATTR Value 15K SYMATTR InstName R4 SYMBOL cap 3360 2080 R0 WINDOW 0 30 15 Left 2 WINDOW 3 29 52 Left 2 SYMATTR InstName C7 SYMATTR Value 1µ SYMBOL nmos 3424 1760 M0 WINDOW 0 32 -4 Right 2 WINDOW 3 39 106 Right 2 SYMATTR InstName Q1 SYMATTR Value FDC2512 SYMBOL PowerProducts\\LTC3726 4480 2000 R0 SYMATTR InstName U2 SYMBOL cap 4784 2112 R0 SYMATTR InstName C8 SYMATTR Value .001µ SYMBOL cap 4800 2016 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 51 32 VTop 2 SYMATTR InstName C9 SYMATTR Value 680p SYMATTR SpiceLine Rser=20K SYMBOL res 4928 1856 R0 SYMATTR InstName R5 SYMATTR Value 110K SYMBOL res 4928 1968 R0 SYMATTR InstName R6 SYMATTR Value 24.9K SYMBOL voltage 3296 1520 R0 SYMATTR InstName V1 SYMATTR Value 36 SYMBOL ind2 3824 1520 R0 WINDOW 0 -4 32 Right 2 WINDOW 3 -3 73 Right 2 SYMATTR InstName L3 SYMATTR Value 194µ SYMATTR Type ind SYMATTR SpiceLine Rpar=10K SYMBOL nmos 3712 1632 R0 WINDOW 0 60 30 Left 2 WINDOW 3 57 65 Left 2 SYMATTR InstName Q2 SYMATTR Value Si7540DP_N SYMBOL res 3744 1744 R0 SYMATTR InstName R8 SYMATTR Value 25m SYMBOL ind2 3904 1520 M0 WINDOW 0 -9 32 Right 2 WINDOW 3 -6 75 Right 2 SYMATTR InstName L4 SYMATTR Value 9.58µ SYMATTR Type ind SYMATTR SpiceLine Rpar=10K SYMBOL nmos 4512 1680 M0 WINDOW 0 -2 29 Right 2 WINDOW 3 -3 61 Right 2 SYMATTR InstName Q3 SYMATTR Value IRF6623 SYMBOL nmos 4016 1648 M0 WINDOW 0 40 -9 Right 2 WINDOW 3 30 97 Right 2 SYMATTR InstName Q4 SYMATTR Value IRF6623 SYMBOL cap 4560 1536 R0 SYMATTR InstName C14 SYMATTR Value 1000µ SYMBOL ind2 3904 1360 M0 WINDOW 0 -5 33 Right 2 WINDOW 3 -5 75 Right 2 SYMATTR InstName L5 SYMATTR Value 100µ SYMATTR Type ind SYMATTR SpiceLine Rser=2 Rpar=10K SYMBOL schottky 4016 1376 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value CMDSH2-3 SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 4160 1376 R0 SYMATTR InstName C15 SYMATTR Value 10µ SYMBOL res 4752 1392 R0 SYMATTR InstName R10 SYMATTR Value 500 SYMBOL zener 4752 1696 M180 WINDOW 0 29 60 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value BZX84C8V2L SYMATTR Description Diode SYMATTR Type diode SYMBOL npn 4736 1568 M0 WINDOW 0 49 -6 Right 2 WINDOW 3 59 121 Right 2 SYMATTR InstName Q5 SYMATTR Value FZT849 SYMBOL cap 4768 1776 R0 SYMATTR InstName C16 SYMATTR Value 34µ SYMBOL ind2 4464 1536 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 4 56 VBottom 2 SYMATTR InstName L6 SYMATTR Value 1.5µ SYMATTR Type ind SYMATTR SpiceLine Rpar=1K SYMBOL res 4976 1520 R0 SYMATTR InstName Rload SYMATTR Value .165 SYMBOL res 3952 1776 R0 SYMATTR InstName R9 SYMATTR Value 2m TEXT 3864 1360 Bottom 2 !K1 L3 L4 L5 1 TEXT 4056 2000 Bottom 2 !K2 L1 L2 1 TEXT 4744 2272 Right 2 !.tran .75m startup LINE Normal 3863 1618 3863 1378 2 LINE Normal 4055 2146 4055 2002 2