Version 4
SHEET 1 2760 680
WIRE 1456 -128 1360 -128
WIRE 1792 -128 1456 -128
WIRE 1824 -128 1792 -128
WIRE 1920 -128 1904 -128
WIRE 2032 -128 1920 -128
WIRE 2144 -128 2096 -128
WIRE 2208 -128 2144 -128
WIRE 2320 -128 2208 -128
WIRE 1360 -112 1360 -128
WIRE 1456 -112 1456 -128
WIRE 2320 -112 2320 -128
WIRE 2208 -96 2208 -128
WIRE 1792 -80 1792 -128
WIRE 1920 -80 1920 -128
WIRE 1360 -16 1360 -32
WIRE 1456 -16 1456 -32
WIRE 1696 -16 1456 -16
WIRE 2032 -16 2016 -16
WIRE 2112 -16 2096 -16
WIRE 2208 -16 2208 -32
WIRE 2320 -16 2320 -32
WIRE 1456 0 1456 -16
WIRE 1600 80 1536 80
WIRE 1696 80 1664 80
WIRE 2048 80 2016 80
WIRE 2144 144 2144 -128
WIRE 1456 176 1456 80
WIRE 1536 176 1536 80
WIRE 1536 176 1456 176
WIRE 1600 176 1536 176
WIRE 1696 176 1680 176
WIRE 2048 176 2048 80
WIRE 2048 176 2016 176
WIRE 1456 272 1456 176
WIRE 1520 272 1456 272
WIRE 1600 272 1584 272
WIRE 1696 272 1680 272
WIRE 2144 272 2144 224
WIRE 2144 272 2016 272
WIRE 2144 288 2144 272
WIRE 1920 352 1920 336
WIRE 1456 384 1456 272
WIRE 1792 384 1792 336
WIRE 1792 384 1456 384
WIRE 2112 384 2112 -16
WIRE 2112 384 1792 384
WIRE 2144 384 2144 368
WIRE 2144 384 2112 384
FLAG 2208 -16 0
FLAG 2320 -16 0
FLAG 1360 -16 0
FLAG 2320 -128 OUT
FLAG 1360 -128 IN
FLAG 1920 352 0
SYMBOL RES 1696 192 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 41.2K
SYMBOL res 2128 272 R0
SYMATTR InstName R2
SYMATTR Value 15.8K
SYMBOL res 2128 128 R0
SYMATTR InstName R3
SYMATTR Value 226K
SYMBOL ind 1808 -112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMBOL schottky 2032 -112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBR735
SYMBOL polcap 2192 -96 R0
WINDOW 40 27 64 Left 2
WINDOW 3 40 36 Left 2
SYMATTR SpiceLine2 x2
SYMATTR Value 10µ
SYMATTR InstName C1
SYMATTR SpiceLine Rser=.1
SYMBOL res 1696 288 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 6.8K
SYMBOL cap 1584 288 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL VOLTAGE 1360 -128 R0
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL polcap 2032 -32 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 4.7µ
SYMBOL cap 1664 64 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value .01µ
SYMBOL res 1440 -16 R0
SYMATTR InstName R5
SYMATTR Value 95.3K
SYMBOL res 1440 -128 R0
SYMATTR InstName R6
SYMATTR Value 200K
SYMBOL res 2304 -128 R0
SYMATTR InstName Rload
SYMATTR Value 40
SYMBOL PowerProducts\\LT3957A 1856 128 R0
SYMATTR InstName U1
TEXT 2256 368 Left 2 !.tran 2.5m startup