Version 4
SHEET 1 2948 1812
WIRE 1696 1248 1584 1248
WIRE 2000 1248 1696 1248
WIRE 2224 1248 2000 1248
WIRE 2256 1248 2224 1248
WIRE 2352 1248 2336 1248
WIRE 1584 1264 1584 1248
WIRE 1696 1264 1696 1248
WIRE 2000 1312 2000 1248
WIRE 2352 1312 2352 1248
WIRE 2352 1312 2272 1312
WIRE 2352 1328 2352 1312
WIRE 1584 1360 1584 1344
WIRE 1696 1376 1696 1344
WIRE 1808 1376 1696 1376
WIRE 2224 1376 2224 1248
WIRE 2224 1376 2192 1376
WIRE 2352 1424 2352 1408
WIRE 2448 1424 2352 1424
WIRE 2560 1424 2512 1424
WIRE 2656 1424 2560 1424
WIRE 2752 1424 2656 1424
WIRE 1616 1440 1584 1440
WIRE 1712 1440 1696 1440
WIRE 1808 1440 1776 1440
WIRE 2272 1440 2272 1312
WIRE 2272 1440 2192 1440
WIRE 2656 1440 2656 1424
WIRE 2752 1440 2752 1424
WIRE 2560 1456 2560 1424
WIRE 1696 1504 1600 1504
WIRE 1792 1504 1696 1504
WIRE 1808 1504 1792 1504
WIRE 2304 1504 2192 1504
WIRE 1600 1520 1600 1504
WIRE 1696 1520 1696 1504
WIRE 2352 1536 2352 1520
WIRE 2656 1536 2656 1504
WIRE 2752 1536 2752 1520
WIRE 1792 1568 1792 1504
WIRE 1808 1568 1792 1568
WIRE 2560 1568 2560 1536
WIRE 2560 1568 2192 1568
WIRE 2560 1584 2560 1568
WIRE 1600 1600 1600 1584
WIRE 1696 1632 1696 1600
WIRE 1808 1632 1696 1632
WIRE 2208 1632 2192 1632
WIRE 2288 1632 2272 1632
WIRE 2384 1632 2368 1632
WIRE 1696 1648 1696 1632
WIRE 2560 1680 2560 1664
WIRE 1872 1712 1872 1696
WIRE 2000 1712 2000 1696
WIRE 2128 1712 2128 1696
WIRE 1696 1728 1696 1712
WIRE 1872 1792 1872 1776
FLAG 2352 1536 0
FLAG 1584 1440 0
FLAG 1696 1728 0
FLAG 1872 1792 0
FLAG 2000 1712 0
FLAG 2128 1712 0
FLAG 1584 1360 0
FLAG 2656 1536 0
FLAG 2560 1680 0
FLAG 2384 1632 0
FLAG 2752 1536 0
FLAG 1600 1600 0
FLAG 2752 1424 OUT
FLAG 1584 1248 IN
SYMBOL POWERPRODUCTS\\LT1680 2000 1504 R0
SYMATTR InstName U1
SYMBOL NMOS 2304 1424 R0
SYMATTR InstName Q1
SYMATTR Value Si4410DY
SYMBOL RES 2240 1264 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 5m
SYMBOL ind 2336 1312 R0
SYMATTR InstName L1
SYMATTR Value 25µ
SYMBOL cap 1776 1424 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 2.2n
SYMBOL res 1680 1248 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL cap 1856 1712 R0
SYMATTR InstName C2
SYMATTR Value .01µ
SYMBOL cap 1680 1648 R0
SYMATTR InstName C3
SYMATTR Value 1000p
SYMBOL res 1680 1504 R0
SYMATTR InstName R3
SYMATTR Value 15K
SYMBOL VOLTAGE 1584 1248 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL schottky 2448 1440 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBRS1100
SYMBOL polcap 2640 1440 R0
SYMATTR SpiceLine Rser=.1
SYMATTR InstName C4
SYMATTR Value 680µ
SYMBOL res 2544 1440 R0
SYMATTR InstName R4
SYMATTR Value 75K
SYMBOL res 2544 1568 R0
SYMATTR InstName R5
SYMATTR Value 2K
SYMBOL res 2272 1648 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 4.7K
SYMBOL cap 2208 1648 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C5
SYMATTR Value .0047µ
SYMBOL res 2736 1424 R0
SYMATTR InstName Rload
SYMATTR Value 20
SYMBOL polcap 1584 1520 R0
SYMATTR InstName C6
SYMATTR Value 1µ
SYMBOL res 1712 1424 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 2K
TEXT 2312 1760 Left 2 !.tran 8m startup