Version 4 SHEET 1 2924 2224 WIRE 1856 1264 1728 1264 WIRE 2032 1264 1856 1264 WIRE 2384 1264 2032 1264 WIRE 2480 1264 2432 1264 WIRE 2592 1264 2544 1264 WIRE 2032 1296 2032 1264 WIRE 2384 1296 2384 1264 WIRE 2432 1296 2432 1264 WIRE 2592 1296 2592 1264 WIRE 1856 1344 1856 1264 WIRE 1904 1344 1856 1344 WIRE 2176 1344 2160 1344 WIRE 2304 1344 2256 1344 WIRE 2432 1392 2432 1376 WIRE 2592 1392 2592 1360 WIRE 1728 1424 1728 1264 WIRE 1776 1424 1728 1424 WIRE 1904 1424 1856 1424 WIRE 2208 1424 2160 1424 WIRE 2304 1424 2304 1344 WIRE 2304 1424 2288 1424 WIRE 2384 1424 2384 1376 WIRE 2384 1424 2304 1424 WIRE 1728 1504 1728 1424 WIRE 1904 1504 1728 1504 WIRE 2336 1504 2160 1504 WIRE 1728 1520 1728 1504 WIRE 1808 1584 1792 1584 WIRE 1904 1584 1888 1584 WIRE 2384 1584 2384 1520 WIRE 2384 1584 2160 1584 WIRE 2384 1600 2384 1584 WIRE 1728 1616 1728 1600 WIRE 2032 1648 2032 1632 WIRE 2384 1696 2384 1680 FLAG 2592 1392 0 FLAG 2032 1648 0 FLAG 1728 1616 0 FLAG 2432 1392 0 FLAG 2384 1696 0 FLAG 1792 1584 0 FLAG 1728 1264 IN FLAG 2592 1264 OUT SYMBOL ind2 2368 1280 R0 WINDOW 0 -6 35 Right 2 WINDOW 3 -4 73 Right 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rpar=2K Rser=.1 SYMBOL ind2 2448 1392 R180 WINDOW 0 -3 72 Right 2 WINDOW 3 0 43 Right 2 SYMATTR InstName L2 SYMATTR Value 1m SYMATTR SpiceLine Rpar=1Meg SYMBOL cap 2576 1296 R0 WINDOW 3 27 55 Left 2 SYMATTR Value 1µ SYMATTR InstName C1 SYMBOL diode 2480 1280 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMBOL res 1872 1408 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 100K SYMBOL VOLTAGE 1728 1504 R0 SYMATTR InstName V1 SYMATTR Value 8 SYMBOL PowerProducts\\LT3750 2032 1456 R0 SYMATTR InstName U1 SYMBOL nmos 2336 1424 R0 SYMATTR InstName Q1 SYMATTR Value FDS6680A SYMBOL res 2272 1328 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 60.4K SYMBOL res 2304 1408 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 43K SYMBOL res 2368 1584 R0 SYMATTR InstName R5 SYMATTR Value 12m SYMBOL res 1904 1568 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R6 SYMATTR Value 2.5K TEXT 2488 1568 Left 2 !.tran 5m startup TEXT 2408 1264 Bottom 2 !K1 L1 L2 1