Version 4 SHEET 1 2892 1844 WIRE 1360 1248 1360 1184 WIRE 1360 1376 1360 1328 WIRE 1472 1184 1360 1184 WIRE 1472 1248 1472 1184 WIRE 1472 1376 1472 1312 WIRE 1488 1504 1488 1488 WIRE 1488 1600 1488 1584 WIRE 1568 1184 1472 1184 WIRE 1568 1360 1568 1184 WIRE 1600 1360 1568 1360 WIRE 1600 1488 1488 1488 WIRE 1680 1184 1568 1184 WIRE 1680 1280 1680 1184 WIRE 1728 1184 1680 1184 WIRE 1760 1600 1760 1568 WIRE 1840 1184 1808 1184 WIRE 1840 1280 1840 1184 WIRE 1920 1184 1840 1184 WIRE 1984 1488 1920 1488 WIRE 2080 1184 1984 1184 WIRE 2080 1200 2080 1184 WIRE 2080 1296 2080 1264 WIRE 2080 1392 2080 1360 WIRE 2080 1488 2048 1488 WIRE 2080 1488 2080 1456 WIRE 2272 1184 2080 1184 WIRE 2272 1232 2272 1184 WIRE 2272 1344 2272 1296 FLAG 1760 1600 0 FLAG 1488 1600 0 FLAG 1360 1376 0 FLAG 2272 1344 0 FLAG 2080 1184 OUT FLAG 1472 1376 0 FLAG 1360 1184 IN SYMBOL RES 1472 1488 R0 SYMATTR InstName R1 SYMATTR Value 1.5K SYMBOL ind 1712 1200 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 6.8µ SYMATTR SpiceLine Rser=250m SYMBOL VOLTAGE 1360 1232 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 3 SYMBOL schottky 1920 1200 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBR0540 SYMBOL cap 2256 1232 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMATTR SpiceLine Rser=10m SYMBOL POWERPRODUCTS\\LT1932 1760 1424 R0 SYMATTR InstName U1 SYMBOL LED 2064 1200 R0 WINDOW 0 27 6 Left 2 WINDOW 3 24 67 Left 2 SYMATTR InstName D2 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED 2064 1296 R0 WINDOW 0 27 6 Left 2 WINDOW 3 24 67 Left 2 SYMATTR InstName D3 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED 2064 1392 R0 WINDOW 0 27 6 Left 2 WINDOW 3 24 67 Left 2 SYMATTR InstName D4 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL LED 2048 1472 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 72 32 VTop 2 SYMATTR InstName D5 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMBOL cap 1456 1248 R0 SYMATTR InstName C2 SYMATTR Value 4.7µ SYMATTR SpiceLine Rser=10m TEXT 2136 1544 Left 2 !.tran .3m startup TEXT 1256 1624 Left 2 ;Note:\n If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n Component substitution and printed circuit board layout may significantly affect circuit performance or reliability.\n Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts.\n Copyright © 2006 Linear Technology Inc. All rights reserved. TEXT 1816 1128 Bottom 2 ;LT1932 - 1.2MHz Step-Up LED Driver\nInput: 3V Output: 15mA through four white LEDs