Version 4
SHEET 1 2392 1424
WIRE 1376 912 1200 912
WIRE 1504 912 1376 912
WIRE 1552 912 1504 912
WIRE 1680 912 1632 912
WIRE 1728 912 1680 912
WIRE 1840 912 1792 912
WIRE 1936 912 1840 912
WIRE 1200 928 1200 912
WIRE 1936 928 1936 912
WIRE 1376 960 1376 912
WIRE 1504 960 1504 912
WIRE 1200 1024 1200 1008
WIRE 1936 1024 1936 1008
WIRE 1680 1040 1680 912
WIRE 1680 1040 1568 1040
WIRE 1840 1104 1840 912
WIRE 1840 1104 1568 1104
WIRE 1840 1120 1840 1104
WIRE 1584 1168 1568 1168
WIRE 1840 1200 1840 1184
WIRE 1440 1264 1440 1248
FLAG 1584 1168 0
FLAG 1440 1264 0
FLAG 1200 1024 0
FLAG 1936 1024 0
FLAG 1840 1200 0
FLAG 1936 912 OUT
FLAG 1200 912 IN
SYMBOL IND 1536 928 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 33µ
SYMATTR SpiceLine Rser=0.02 Rpar=5000
SYMBOL schottky 1728 928 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMBOL POLCAP 1824 1120 R0
SYMATTR InstName C2
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=0.02
SYMBOL VOLTAGE 1200 912 R0
SYMATTR InstName V1
SYMATTR Value 2.8
SYMBOL PowerProducts\\LT1073-12 1440 1104 R0
SYMATTR InstName U1
SYMBOL res 1920 912 R0
SYMATTR InstName Rload
SYMATTR Value 240
TEXT 1728 1264 Left 2 !.tran 25m startup