Version 4 SHEET 1 2640 1416 WIRE 1520 944 1296 944 WIRE 1584 944 1520 944 WIRE 1696 944 1664 944 WIRE 1760 944 1696 944 WIRE 1888 944 1824 944 WIRE 2000 944 1888 944 WIRE 2112 944 2000 944 WIRE 1296 960 1296 944 WIRE 2000 960 2000 944 WIRE 2112 960 2112 944 WIRE 1888 992 1888 944 WIRE 1520 1008 1520 944 WIRE 1296 1056 1296 1040 WIRE 2000 1056 2000 1024 WIRE 2112 1056 2112 1040 WIRE 1696 1072 1696 944 WIRE 1696 1072 1648 1072 WIRE 1392 1104 1360 1104 WIRE 1888 1136 1888 1072 WIRE 1888 1136 1648 1136 WIRE 1888 1152 1888 1136 WIRE 1520 1232 1520 1200 WIRE 1888 1248 1888 1232 FLAG 2112 944 OUT FLAG 1888 1248 0 FLAG 2000 1056 0 FLAG 2112 1056 0 FLAG 1296 1056 0 FLAG 1520 1232 0 FLAG 1296 944 IN SYMBOL RES 1872 1136 R0 SYMATTR InstName R1 SYMATTR Value 83K SYMBOL RES 1872 976 R0 SYMATTR InstName R2 SYMATTR Value 250K SYMBOL VOLTAGE 1296 944 R0 SYMATTR InstName V1 SYMATTR Value 3 SYMATTR SpiceLine Rser=0.1 SYMBOL POLCAP 1984 960 R0 SYMATTR InstName C1 SYMATTR Value 22µ SYMATTR SpiceLine Rser=0.02 SYMBOL IND 1568 960 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 PowerProducts\\LT1109A 1520 1088 R0 SYMATTR InstName U1 SYMBOL res 2096 944 R0 SYMATTR InstName Rload SYMATTR Value 25 SYMBOL diode 1760 960 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value DD TEXT 1648 1248 Left 2 !.tran 2m steady startup TEXT 1368 856 Left 2 !.model DD D(Is=1u bv=15 Ibv=1m Vpk=5) TEXT 1368 792 Left 4 ;Only Vpk is used to flag the diode.