Version 4
SHEET 1 1608 1816
WIRE -160 912 -304 912
WIRE 224 912 -160 912
WIRE 816 912 224 912
WIRE -160 976 -160 912
WIRE -112 976 -160 976
WIRE -16 976 -48 976
WIRE 0 976 -16 976
WIRE 112 976 80 976
WIRE 384 976 112 976
WIRE 544 976 384 976
WIRE 704 976 544 976
WIRE 1008 976 704 976
WIRE 1120 976 1008 976
WIRE 1248 976 1120 976
WIRE 1248 992 1248 976
WIRE 816 1008 816 912
WIRE 864 1008 816 1008
WIRE 544 1024 544 976
WIRE 864 1040 864 1008
WIRE 1120 1056 1120 976
WIRE -304 1088 -304 912
WIRE -160 1088 -160 976
WIRE 1248 1088 1248 1072
WIRE 1008 1104 1008 976
WIRE 224 1120 224 912
WIRE 384 1120 384 976
WIRE 544 1120 544 1104
WIRE 704 1120 704 976
WIRE 864 1120 864 1104
WIRE 112 1184 112 976
WIRE 144 1184 112 1184
WIRE 960 1184 784 1184
WIRE -16 1248 -16 976
WIRE 144 1248 -16 1248
WIRE 864 1248 784 1248
WIRE 1008 1248 1008 1200
WIRE 1008 1248 864 1248
WIRE 1120 1248 1120 1120
WIRE 1120 1248 1008 1248
WIRE 1168 1248 1120 1248
WIRE 1280 1248 1248 1248
WIRE 1328 1248 1280 1248
WIRE 1424 1248 1328 1248
WIRE 1328 1264 1328 1248
WIRE 1424 1264 1424 1248
WIRE 1120 1280 1120 1248
WIRE -256 1312 -272 1312
WIRE -160 1312 -160 1168
WIRE -160 1312 -176 1312
WIRE 144 1312 -160 1312
WIRE 864 1312 784 1312
WIRE 1120 1360 1120 1344
WIRE 1328 1360 1328 1328
WIRE 1424 1360 1424 1344
WIRE 816 1376 816 1008
WIRE 816 1376 784 1376
WIRE 864 1376 816 1376
WIRE -304 1440 -304 1168
WIRE 144 1440 -304 1440
WIRE 1008 1440 1008 1248
WIRE 1008 1440 784 1440
WIRE 1008 1456 1008 1440
WIRE -48 1504 -80 1504
WIRE 48 1504 16 1504
WIRE 144 1504 128 1504
WIRE 912 1504 784 1504
WIRE 912 1536 912 1504
WIRE 960 1536 912 1536
WIRE 0 1568 -32 1568
WIRE 144 1568 64 1568
WIRE 1008 1568 1008 1552
WIRE 1008 1568 784 1568
WIRE 1008 1584 1008 1568
WIRE 144 1632 80 1632
WIRE 816 1632 784 1632
WIRE 224 1712 224 1696
WIRE 384 1712 384 1696
WIRE 544 1712 544 1696
WIRE 704 1712 704 1696
WIRE 80 1744 80 1632
WIRE 816 1744 816 1632
WIRE 816 1744 80 1744
WIRE 1280 1744 1280 1248
WIRE 1280 1744 816 1744
FLAG -80 1504 0
FLAG -32 1568 0
FLAG 1008 1584 0
FLAG 864 1120 0
FLAG 1120 1360 0
FLAG 1424 1360 0
FLAG 1328 1360 0
FLAG 1424 1248 OUT
FLAG 224 1712 0
FLAG 384 1712 0
FLAG 544 1712 0
FLAG 704 1712 0
FLAG -272 1312 0
FLAG 1248 1088 0
SYMBOL RES 144 1488 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 20K
SYMBOL cap 16 1488 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 500p
SYMBOL cap 64 1552 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value .001µ
SYMBOL POWERPRODUCTS\\LTC3718 464 1408 R0
SYMATTR InstName U1
SYMBOL NMOS 960 1456 R0
SYMATTR InstName Q1
SYMATTR Value IRF7303
SYMBOL schottky 848 1376 M180
WINDOW 0 42 40 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N5818
SYMBOL cap 848 1040 R0
SYMATTR InstName C3
SYMATTR Value 10µ
SYMBOL schottky 1104 1344 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMBOL nmos 960 1104 R0
SYMATTR InstName Q2
SYMATTR Value IRF7303
SYMBOL ind 1152 1264 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value .8µ
SYMBOL polcap 1312 1264 R0
SYMATTR InstName C4
SYMATTR Value 470µ
SYMBOL cap 848 1248 R0
WINDOW 0 37 19 Left 2
WINDOW 3 29 50 Left 2
SYMATTR InstName C5
SYMATTR Value .33µ
SYMBOL RES 528 1008 R0
SYMATTR InstName R2
SYMATTR Value 237K
SYMBOL ind -16 992 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L2
SYMATTR Value 1.8µ
SYMBOL schottky -48 960 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value BAT54
SYMBOL RES -176 1072 R0
SYMATTR InstName R3
SYMATTR Value 37.4K
SYMBOL RES -160 1296 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 12.1K
SYMBOL VOLTAGE 1248 976 R0
SYMATTR InstName V1
SYMATTR Value 2.5
SYMBOL schottky 1104 1120 M180
WINDOW 0 24 72 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D4
SYMATTR Value 1N5818
SYMBOL RES -320 1184 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R5
SYMATTR Value 20K
SYMBOL res 1408 1248 R0
SYMATTR InstName Rload
SYMATTR Value 1
TEXT 1008 1688 Left 2 !.tran 2m startup