Version 4 SHEET 1 2184 704 WIRE 144 -16 -80 -16 WIRE 352 -16 144 -16 WIRE 464 -16 400 -16 WIRE 560 -16 528 -16 WIRE 608 -16 560 -16 WIRE 704 -16 608 -16 WIRE -80 0 -80 -16 WIRE 144 0 144 -16 WIRE 608 0 608 -16 WIRE 704 0 704 -16 WIRE 352 16 352 -16 WIRE 400 16 400 -16 WIRE -80 96 -80 80 WIRE 64 96 48 96 WIRE 144 96 144 80 WIRE 144 96 128 96 WIRE 608 96 608 64 WIRE 704 96 704 80 WIRE 352 112 352 96 WIRE 560 112 560 -16 WIRE 400 128 400 96 WIRE 144 144 144 96 WIRE 304 192 272 192 WIRE -160 256 -176 256 WIRE -80 256 -96 256 WIRE 16 256 0 256 WIRE 352 256 352 208 WIRE 352 256 272 256 WIRE 560 256 560 192 WIRE 560 256 480 256 WIRE 352 272 352 256 WIRE 560 272 560 256 WIRE 304 320 272 320 WIRE 352 368 352 352 WIRE 560 368 560 352 WIRE 144 384 144 368 WIRE 304 400 304 320 WIRE 480 400 480 256 WIRE 480 400 304 400 FLAG 144 384 0 FLAG 352 368 0 FLAG -80 96 0 FLAG 400 128 0 FLAG 608 96 0 FLAG 704 96 0 FLAG -176 256 0 FLAG 704 -16 OUT FLAG 560 368 0 FLAG 48 96 0 FLAG -80 -16 IN SYMBOL PowerProducts\\LTC3803 144 256 R0 SYMATTR InstName U1 SYMBOL ind2 336 0 R0 WINDOW 0 -5 33 Right 2 WINDOW 3 -2 77 Right 2 SYMATTR InstName L1 SYMATTR Value 76µ SYMATTR Type ind SYMATTR SpiceLine Rser=.01 Cpar=1p SYMBOL ind2 416 112 R180 WINDOW 0 -3 80 Right 2 WINDOW 3 -3 37 Right 2 SYMATTR InstName L2 SYMATTR Value 1µ SYMATTR Type ind SYMATTR SpiceLine Rser=1m Cpar=2p SYMBOL nmos 304 112 R0 WINDOW 0 46 29 Left 2 SYMATTR InstName Q1 SYMATTR Value Si4848DY SYMBOL res 336 256 R0 SYMATTR InstName R1 SYMATTR Value 0.068 SYMBOL res 128 -16 R0 SYMATTR InstName R2 SYMATTR Value 6.8K SYMBOL schottky 464 0 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 SYMATTR InstName D1 SYMATTR Value 1N5817 SYMATTR Description Diode SYMATTR Type diode SYMBOL res 544 208 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R3 SYMATTR Value 105K SYMBOL res 544 368 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 20K SYMBOL cap 592 0 R0 SYMATTR InstName C1 SYMATTR Value 300µ SYMATTR SpiceLine Rser=10m SYMBOL cap 128 80 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C2 SYMATTR Value 10µ SYMBOL res 16 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 56K SYMBOL cap -96 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C3 SYMATTR Value .0047µ SYMBOL voltage -80 -16 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 36 SYMBOL res 688 -16 R0 SYMATTR InstName Rload SYMATTR Value 5 TEXT 376 -16 Bottom 2 !K1 L1 L2 1 TEXT 440 432 Left 2 !.tran 22ms startup