Version 4 SHEET 1 2716 1784 WIRE 2096 1312 1984 1312 WIRE 2176 1312 2096 1312 WIRE 2416 1312 2240 1312 WIRE 1824 1344 1616 1344 WIRE 2096 1344 2096 1312 WIRE 1616 1360 1616 1344 WIRE 1824 1360 1824 1344 WIRE 1984 1360 1984 1312 WIRE 2224 1392 2176 1392 WIRE 2304 1392 2224 1392 WIRE 2416 1392 2416 1312 WIRE 2416 1392 2384 1392 WIRE 2480 1392 2416 1392 WIRE 2576 1392 2480 1392 WIRE 2224 1408 2224 1392 WIRE 2480 1408 2480 1392 WIRE 2576 1408 2576 1392 WIRE 1744 1440 1728 1440 WIRE 2096 1440 2096 1408 WIRE 2096 1440 2064 1440 WIRE 2176 1440 2176 1392 WIRE 2176 1440 2096 1440 WIRE 1616 1456 1616 1440 WIRE 2224 1488 2224 1472 WIRE 2480 1504 2480 1472 WIRE 2576 1504 2576 1488 WIRE 2416 1520 2416 1392 WIRE 2416 1520 2064 1520 WIRE 1568 1600 1504 1600 WIRE 1664 1600 1632 1600 WIRE 1744 1600 1664 1600 WIRE 2416 1600 2064 1600 WIRE 1504 1616 1504 1600 WIRE 1664 1616 1664 1600 WIRE 2416 1616 2416 1600 WIRE 1904 1696 1904 1680 WIRE 1504 1712 1504 1696 WIRE 1664 1712 1664 1680 WIRE 2416 1712 2416 1696 FLAG 2224 1488 0 FLAG 2416 1712 0 FLAG 2480 1504 0 FLAG 2576 1504 0 FLAG 1904 1696 0 FLAG 1664 1712 0 FLAG 1616 1456 0 FLAG 1504 1712 0 FLAG 2576 1392 OUT FLAG 1616 1344 IN SYMBOL ind 2288 1408 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMBOL cap 1648 1616 R0 SYMATTR InstName C1 SYMATTR Value 250p SYMBOL cap 2080 1408 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C2 SYMATTR Value .33µ SYMBOL schottky 2208 1472 M180 WINDOW 0 35 62 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D1 SYMATTR Value MBRS340 SYMBOL polcap 2464 1408 R0 SYMATTR InstName C3 SYMATTR Value 47µ SYMATTR SpiceLine Rser=.1 SYMBOL RES 2400 1504 R0 SYMATTR InstName R1 SYMATTR Value 15.4K SYMBOL res 2400 1600 R0 SYMATTR InstName R2 SYMATTR Value 4.99K SYMBOL diode 2240 1296 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName D2 SYMATTR Value 1N914 SYMBOL VOLTAGE 1616 1344 R0 SYMATTR InstName V1 SYMATTR Value 20 SYMBOL PowerProducts\\LT3431 1904 1520 R0 SYMATTR InstName U1 SYMBOL cap 1632 1584 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C5 SYMATTR Value .015µ SYMBOL res 1488 1600 R0 SYMATTR InstName R3 SYMATTR Value 1.5K SYMBOL res 2560 1392 R0 SYMATTR InstName Rload SYMATTR Value 1.5 TEXT 2128 1736 Left 2 !.tran 750u startup