Version 4 SHEET 1 2536 1752 WIRE 1632 1168 1248 1168 WIRE 1824 1168 1632 1168 WIRE 1904 1168 1824 1168 WIRE 1248 1184 1248 1168 WIRE 1632 1184 1632 1168 WIRE 1904 1216 1904 1168 WIRE 1392 1232 1376 1232 WIRE 1472 1232 1456 1232 WIRE 1824 1232 1824 1168 WIRE 1824 1232 1792 1232 WIRE 1248 1280 1248 1264 WIRE 1472 1328 1440 1328 WIRE 1904 1328 1904 1296 WIRE 1904 1328 1792 1328 WIRE 1984 1328 1904 1328 WIRE 2080 1328 2048 1328 WIRE 2192 1328 2080 1328 WIRE 2304 1328 2192 1328 WIRE 1904 1344 1904 1328 WIRE 2192 1344 2192 1328 WIRE 2304 1344 2304 1328 WIRE 2080 1376 2080 1328 WIRE 1168 1424 1120 1424 WIRE 1280 1424 1248 1424 WIRE 1472 1424 1280 1424 WIRE 1856 1424 1792 1424 WIRE 1120 1440 1120 1424 WIRE 1280 1440 1280 1424 WIRE 2192 1440 2192 1408 WIRE 2304 1440 2304 1424 WIRE 1904 1456 1904 1440 WIRE 1120 1520 1120 1504 WIRE 1280 1520 1280 1504 WIRE 1376 1520 1360 1520 WIRE 1472 1520 1456 1520 WIRE 2080 1520 2080 1456 WIRE 2080 1520 1792 1520 WIRE 2080 1536 2080 1520 WIRE 1632 1584 1632 1568 WIRE 2080 1632 2080 1616 FLAG 1904 1456 0 FLAG 1360 1520 0 FLAG 2080 1632 0 FLAG 1632 1584 0 FLAG 2192 1440 0 FLAG 1280 1520 0 FLAG 1120 1520 0 FLAG 2304 1440 0 FLAG 1248 1280 0 FLAG 1440 1328 0 FLAG 1376 1232 0 FLAG 2304 1328 OUT FLAG 1248 1168 IN SYMBOL NMOS 1856 1344 R0 SYMATTR InstName Q1 SYMATTR Value IRF7811 SYMBOL RES 1472 1504 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 80.6K SYMBOL res 2064 1520 R0 SYMATTR InstName R2 SYMATTR Value 12K SYMBOL res 2064 1360 R0 SYMATTR InstName R3 SYMATTR Value 36.8K SYMBOL ind 1888 1200 R0 SYMATTR InstName L1 SYMATTR Value 1µ SYMBOL schottky 1984 1344 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBR735 SYMBOL polcap 2176 1344 R0 WINDOW 40 27 64 Left 2 WINDOW 3 40 36 Left 2 SYMATTR SpiceLine2 x2 SYMATTR Value 150µ SYMATTR InstName C1 SYMATTR SpiceLine Rser=.05 SYMBOL res 1264 1408 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 22K SYMBOL cap 1104 1440 R0 SYMATTR InstName C2 SYMATTR Value 6800p SYMBOL cap 1264 1440 R0 SYMATTR InstName C3 SYMATTR Value 50p SYMBOL POWERPRODUCTS\\LTC1871 1632 1376 R0 SYMATTR InstName U1 SYMBOL VOLTAGE 1248 1168 R0 SYMATTR InstName V1 SYMATTR Value 3.3 SYMBOL polcap 1456 1216 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value 4.7µ SYMBOL res 2288 1328 R0 SYMATTR InstName Rload SYMATTR Value 5 TEXT 2192 1576 Left 2 !.tran 750u startup