Version 4
SHEET 1 2488 1440
WIRE 1472 912 1296 912
WIRE 1600 912 1472 912
WIRE 1632 912 1600 912
WIRE 1744 912 1712 912
WIRE 1792 912 1744 912
WIRE 1920 912 1856 912
WIRE 2032 912 1920 912
WIRE 2144 912 2032 912
WIRE 1296 928 1296 912
WIRE 2032 928 2032 912
WIRE 2144 928 2144 912
WIRE 1472 960 1472 912
WIRE 1600 960 1600 912
WIRE 1920 960 1920 912
WIRE 1296 1024 1296 1008
WIRE 1392 1024 1376 1024
WIRE 1744 1024 1744 912
WIRE 1744 1024 1680 1024
WIRE 2032 1024 2032 992
WIRE 2144 1024 2144 1008
WIRE 1920 1104 1920 1040
WIRE 1920 1104 1680 1104
WIRE 1920 1120 1920 1104
WIRE 1392 1184 1376 1184
WIRE 1712 1184 1680 1184
WIRE 1920 1216 1920 1200
WIRE 1536 1264 1536 1248
FLAG 1536 1264 0
FLAG 1712 1184 0
FLAG 2032 1024 0
FLAG 1920 1216 0
FLAG 1296 1024 0
FLAG 2144 1024 0
FLAG 2144 912 OUT
FLAG 1296 912 IN
SYMBOL RES 1904 944 R0
SYMATTR InstName R1
SYMATTR Value 220K
SYMBOL RES 1904 1104 R0
SYMATTR InstName R2
SYMATTR Value 73.5K
SYMBOL IND 1616 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 1792 928 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBRS140
SYMBOL POLCAP 2016 928 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMATTR SpiceLine Rser=0.02
SYMBOL VOLTAGE 1296 912 R0
SYMATTR InstName V1
SYMATTR Value 2.8
SYMBOL POWERPRODUCTS\\LT1107 1536 1104 R0
SYMATTR InstName U1
SYMBOL RES 2128 912 R0
SYMATTR InstName Rload
SYMATTR Value 25
TEXT 1904 1280 Left 2 !.tran 10m startup