Version 4
SHEET 1 2760 680
WIRE 1456 -128 1360 -128
WIRE 1856 -128 1456 -128
WIRE 2032 -128 1856 -128
WIRE 2144 -128 2112 -128
WIRE 2192 -128 2144 -128
WIRE 2288 -128 2256 -128
WIRE 2400 -128 2288 -128
WIRE 2512 -128 2400 -128
WIRE 1360 -112 1360 -128
WIRE 1456 -112 1456 -128
WIRE 2400 -112 2400 -128
WIRE 2512 -112 2512 -128
WIRE 1856 -80 1856 -128
WIRE 1360 -16 1360 -32
WIRE 1456 -16 1456 -32
WIRE 1696 -16 1456 -16
WIRE 2032 -16 2016 -16
WIRE 2400 -16 2400 -48
WIRE 2512 -16 2512 -32
WIRE 1456 0 1456 -16
WIRE 2144 0 2144 -128
WIRE 1600 80 1568 80
WIRE 1696 80 1664 80
WIRE 2096 80 2016 80
WIRE 1456 96 1456 80
WIRE 2144 112 2144 96
WIRE 2144 112 2080 112
WIRE 2144 128 2144 112
WIRE 2288 144 2288 -128
WIRE 1600 176 1568 176
WIRE 1696 176 1680 176
WIRE 2080 176 2080 112
WIRE 2080 176 2016 176
WIRE 2144 224 2144 208
WIRE 1520 272 1504 272
WIRE 1600 272 1584 272
WIRE 1696 272 1680 272
WIRE 2288 272 2288 224
WIRE 2288 272 2016 272
WIRE 2288 288 2288 272
WIRE 1856 352 1856 336
WIRE 2288 384 2288 368
FLAG 1568 176 0
FLAG 2288 384 0
FLAG 1856 352 0
FLAG 2400 -16 0
FLAG 1504 272 0
FLAG 2512 -16 0
FLAG 1360 -16 0
FLAG 1568 80 0
FLAG 2096 -16 0
FLAG 2512 -128 OUT
FLAG 1360 -128 IN
FLAG 1456 96 0
FLAG 2144 224 0
SYMBOL PowerProducts\\LT3757 1856 128 R0
SYMATTR InstName U1
SYMBOL NMOS 2096 0 R0
SYMATTR InstName Q1
SYMATTR Value FDS6680A
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 2272 272 R0
SYMATTR InstName R2
SYMATTR Value 16.2K
SYMBOL res 2272 128 R0
SYMATTR InstName R3
SYMATTR Value 226K
SYMBOL ind 2016 -112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName L1
SYMATTR Value 10µ
SYMBOL schottky 2192 -112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value MBR735
SYMBOL polcap 2384 -112 R0
WINDOW 40 27 64 Left 2
WINDOW 3 40 36 Left 2
SYMATTR SpiceLine2 x2
SYMATTR Value 47µ
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 22K
SYMBOL cap 1584 288 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C2
SYMATTR Value 6800p
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 43.2K
SYMBOL res 1440 -128 R0
SYMATTR InstName R6
SYMATTR Value 200K
SYMBOL res 2496 -128 R0
SYMATTR InstName Rload
SYMATTR Value 12
SYMBOL res 2128 112 R0
SYMATTR InstName R7
SYMATTR Value .01
TEXT 2400 368 Left 2 !.tran 1.5m startup