Version 4 SHEET 1 3476 1348 WIRE 528 0 256 0 WIRE 896 0 528 0 WIRE 1088 0 960 0 WIRE 1312 0 1152 0 WIRE 1552 0 1312 0 WIRE 1648 0 1552 0 WIRE 1728 0 1648 0 WIRE 256 16 256 0 WIRE 528 16 528 0 WIRE 896 16 896 0 WIRE 960 16 960 0 WIRE 1552 16 1552 0 WIRE 1728 16 1728 0 WIRE 256 112 256 96 WIRE 528 112 528 96 WIRE 528 112 320 112 WIRE 896 112 896 96 WIRE 960 112 960 96 WIRE 1552 112 1552 80 WIRE 1728 112 1728 96 WIRE 320 128 320 112 WIRE 528 144 528 112 WIRE 1648 144 1648 0 WIRE 848 192 656 192 WIRE 320 208 320 192 WIRE 400 256 336 256 WIRE 672 256 656 256 WIRE 816 256 752 256 WIRE 896 256 896 208 WIRE 896 256 816 256 WIRE 816 272 816 256 WIRE 896 272 896 256 WIRE 1312 304 1312 0 WIRE 704 320 656 320 WIRE 336 336 336 256 WIRE 704 336 704 320 WIRE 816 368 816 336 WIRE 896 368 896 352 WIRE 1184 368 1008 368 WIRE 1648 368 1648 224 WIRE 1648 368 1440 368 WIRE 528 384 528 368 WIRE 1008 400 1008 368 WIRE 704 432 704 416 WIRE 1104 480 1088 480 WIRE 1184 480 1168 480 WIRE 1456 480 1440 480 WIRE 1536 480 1520 480 WIRE 1648 480 1648 368 WIRE 1648 480 1616 480 WIRE 1648 496 1648 480 WIRE 336 512 336 400 WIRE 656 512 336 512 WIRE 1008 512 1008 480 WIRE 1008 512 848 512 WIRE 336 528 336 512 WIRE 1312 560 1312 544 WIRE 656 576 640 576 WIRE 560 608 544 608 WIRE 656 608 640 608 WIRE 880 608 848 608 WIRE 336 624 336 608 WIRE 336 720 336 704 FLAG 528 384 0 FLAG 544 608 0 FLAG 256 112 0 FLAG 1728 112 0 FLAG 1552 112 0 FLAG 960 112 0 FLAG 1312 560 0 FLAG 1648 576 0 FLAG 1088 480 0 FLAG 880 608 0 FLAG 896 368 0 FLAG 816 368 0 FLAG 704 432 0 FLAG 320 208 0 FLAG 640 576 0 FLAG 336 720 0 FLAG 1728 0 OUT FLAG 256 0 IN SYMBOL PowerProducts\\LTC3803 528 256 R0 SYMATTR InstName U1 SYMBOL voltage 256 0 R0 WINDOW 3 30 87 Left 2 SYMATTR Value 13 SYMATTR InstName V1 SYMBOL res 512 0 R0 SYMATTR InstName R1 SYMATTR Value 399 SYMBOL cap 304 128 R0 SYMATTR InstName C1 SYMATTR Value 4.7µ SYMBOL res 720 320 M0 WINDOW 0 -9 46 Right 2 WINDOW 3 -6 74 Right 2 SYMATTR InstName R2 SYMATTR Value 1000 SYMBOL nmos 848 112 R0 WINDOW 0 1 43 Right 2 WINDOW 3 37 104 Right 2 SYMATTR InstName Q1 SYMATTR Value FDS6680A SYMBOL res 880 256 R0 SYMATTR InstName R3 SYMATTR Value 0.2 SYMBOL res 768 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value 5.1K SYMBOL schottky 1088 16 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value MBRS1100 SYMATTR Description Diode SYMATTR Type diode SYMBOL ind2 976 112 R180 WINDOW 0 -5 76 Right 2 WINDOW 3 -1 45 Right 2 SYMATTR InstName L1 SYMATTR Value 200µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.344 SYMBOL ind2 880 0 R0 WINDOW 0 -4 34 Right 2 WINDOW 3 -1 70 Right 2 SYMATTR InstName L2 SYMATTR Value 200µ SYMATTR Type ind SYMATTR SpiceLine Rser=0.344 SYMBOL polcap 1536 16 R0 WINDOW 3 24 64 Left 2 SYMATTR Value 100µ SYMATTR InstName C2 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine Rser=0.1 SYMBOL Optos\\MOC207 752 576 M0 SYMATTR InstName U2 SYMBOL res 1632 128 R0 SYMATTR InstName R5 SYMATTR Value 73.2K SYMBOL res 1632 480 R0 SYMATTR InstName R6 SYMATTR Value 10K SYMBOL res 656 592 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R7 SYMATTR Value 475K SYMBOL res 992 384 R0 SYMATTR InstName R8 SYMATTR Value 3K SYMBOL cap 1168 464 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value .05µ SYMBOL res 1632 464 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 200K SYMBOL cap 1520 464 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C4 SYMATTR Value .001µ SYMBOL diode 320 336 R0 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL res 320 512 R0 SYMATTR InstName R10 SYMATTR Value 4.99K SYMBOL PowerProducts\\LT4430 1312 416 R0 WINDOW 0 17 -131 Left 2 SYMATTR InstName U3 SYMBOL voltage 336 608 R0 WINDOW 123 0 0 Left 2 WINDOW 3 41 60 Left 2 SYMATTR Value 5 SYMATTR InstName V2 SYMBOL cap 800 272 R0 SYMATTR InstName C5 SYMATTR Value .1µ SYMBOL res 1712 0 R0 SYMATTR InstName Rload SYMATTR Value 100 TEXT 928 -8 Bottom 2 !K1 L1 L2 1 TEXT 1208 720 Left 2 !.tran 7m startup