Version 4 SHEET 1 1348 680 WIRE 320 -656 -416 -656 WIRE 752 -608 368 -608 WIRE 816 -608 752 -608 WIRE 928 -608 896 -608 WIRE 976 -608 928 -608 WIRE 1072 -608 976 -608 WIRE 1184 -608 1072 -608 WIRE 976 -592 976 -608 WIRE 1072 -592 1072 -608 WIRE 1184 -592 1184 -608 WIRE 320 -576 -384 -576 WIRE 320 -560 -16 -560 WIRE -16 -544 -16 -560 WIRE 560 -528 368 -528 WIRE 976 -496 976 -528 WIRE 1072 -496 1072 -528 WIRE 1184 -496 1184 -512 WIRE 320 -480 256 -480 WIRE 256 -464 256 -480 WIRE 560 -464 560 -528 WIRE 624 -464 560 -464 WIRE 752 -464 752 -608 WIRE 752 -464 688 -464 WIRE -416 -432 -416 -656 WIRE -416 -432 -576 -432 WIRE 80 -432 -416 -432 WIRE 240 -432 80 -432 WIRE 320 -432 240 -432 WIRE -576 -416 -576 -432 WIRE 320 -400 320 -432 WIRE 560 -400 560 -464 WIRE -160 -384 -208 -384 WIRE -128 -384 -160 -384 WIRE -16 -384 -16 -480 WIRE -16 -384 -48 -384 WIRE -208 -368 -208 -384 WIRE -16 -368 -16 -384 WIRE 240 -368 240 -432 WIRE -576 -320 -576 -336 WIRE 512 -320 464 -320 WIRE -208 -288 -208 -304 WIRE -16 -288 -16 -304 WIRE 560 -288 560 -304 WIRE -384 -272 -384 -576 WIRE -384 -272 -448 -272 WIRE 80 -272 80 -432 WIRE 160 -272 144 -272 WIRE 240 -272 240 -288 WIRE 240 -272 224 -272 WIRE 320 -272 320 -320 WIRE 352 -272 320 -272 WIRE -384 -256 -384 -272 WIRE -448 -240 -448 -272 WIRE 160 -192 128 -192 WIRE -208 -176 -336 -176 WIRE 752 -176 752 -464 WIRE 752 -176 480 -176 WIRE 0 -160 -16 -160 WIRE 80 -160 80 -176 WIRE 80 -160 64 -160 WIRE 752 -144 752 -176 WIRE -448 -128 -448 -176 WIRE -384 -128 -384 -160 WIRE -384 -128 -448 -128 WIRE -80 -128 -384 -128 WIRE -384 -112 -384 -128 WIRE 80 -96 80 -160 WIRE 80 -96 -176 -96 WIRE 464 -64 464 -320 WIRE 464 -64 400 -64 WIRE 704 -64 560 -64 WIRE -80 -48 -80 -128 WIRE 0 -48 0 -64 WIRE 80 -48 80 -96 WIRE 160 -48 160 -192 WIRE 240 -48 240 -272 WIRE 320 -48 320 -272 WIRE 400 -48 400 -64 WIRE 480 -48 480 -176 WIRE 560 -48 560 -64 WIRE 752 -32 752 -48 WIRE -384 -16 -384 -32 WIRE -160 16 -160 -384 WIRE -144 16 -160 16 WIRE 640 16 624 16 WIRE 928 16 928 -608 WIRE 928 16 720 16 WIRE -208 112 -208 -176 WIRE -144 112 -208 112 WIRE 640 112 624 112 WIRE 736 112 720 112 WIRE -144 208 -160 208 WIRE 640 208 624 208 WIRE 736 208 720 208 WIRE -176 304 -176 -96 WIRE -144 304 -176 304 WIRE 736 304 736 208 WIRE 736 304 624 304 WIRE 752 304 736 304 WIRE 848 304 832 304 WIRE -240 400 -256 400 WIRE -144 400 -160 400 WIRE 736 400 624 400 WIRE 816 400 800 400 WIRE -80 480 -80 464 WIRE 0 480 0 464 WIRE 160 480 160 464 WIRE 240 480 240 464 WIRE 320 480 320 464 WIRE 400 480 400 464 WIRE 480 480 480 464 WIRE 80 496 80 464 WIRE 560 496 560 464 WIRE 80 576 80 560 WIRE 240 576 240 560 WIRE 320 576 320 560 WIRE 400 576 400 560 WIRE 480 576 480 560 WIRE 560 576 560 560 FLAG -80 480 0 FLAG 160 480 0 FLAG 80 576 0 FLAG 0 480 0 FLAG 240 576 0 FLAG 320 576 0 FLAG 400 576 0 FLAG 480 576 0 FLAG 560 576 0 FLAG 816 400 0 FLAG 848 304 0 FLAG 736 112 0 FLAG -384 -16 0 FLAG -576 -320 0 FLAG -576 -432 IN FLAG 560 -288 0 FLAG 752 -32 0 FLAG -256 400 0 FLAG 256 -464 0 FLAG -16 -288 0 FLAG -208 -288 0 FLAG 144 -272 0 FLAG 416 -272 0 FLAG 976 -496 0 FLAG 1072 -496 0 FLAG -16 -160 0 FLAG 1184 -608 OUT FLAG 1184 -496 0 FLAG 0 -64 0 SYMBOL PowerProducts\\LTC3766 240 208 R0 SYMATTR InstName U1 SYMBOL cap 64 496 R0 SYMATTR InstName C1 SYMATTR Value 3.3n SYMBOL res 224 464 R0 WINDOW 3 24 91 Left 2 SYMATTR Value 16.2K SYMATTR InstName R1 SYMBOL res 304 464 R0 WINDOW 3 28 92 Left 2 SYMATTR Value 22K SYMATTR InstName R2 SYMBOL res 384 464 R0 WINDOW 3 28 92 Left 2 SYMATTR Value 100K SYMATTR InstName R3 SYMBOL res 464 464 R0 WINDOW 3 28 92 Left 2 SYMATTR Value 20.5K SYMATTR InstName R4 SYMBOL cap 544 496 R0 SYMATTR InstName C2 SYMATTR Value .22µ SYMBOL cap 736 416 R270 WINDOW 39 -21 32 VBottom 2 WINDOW 3 0 32 VBottom 2 WINDOW 0 32 32 VTop 2 SYMATTR SpiceLine Rser=6.2K Cpar=47p SYMATTR Value 2.2n SYMATTR InstName C3 SYMBOL res 624 224 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R5 SYMATTR Value 8.62K SYMBOL res 736 320 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R6 SYMATTR Value 1.82K SYMBOL res 624 128 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 0 56 VBottom 2 SYMATTR InstName R7 SYMATTR Value 100 SYMBOL nmos -336 -256 M0 WINDOW 0 37 -4 Right 2 WINDOW 3 4 62 Right 2 SYMATTR InstName Q1 SYMATTR Value BSC320N20NS3 SYMBOL res -400 -128 R0 SYMATTR InstName R8 SYMATTR Value 15m SYMBOL cap -464 -240 R0 SYMATTR InstName C4 SYMATTR Value 1.5n SYMBOL ind2 304 -672 R0 WINDOW 0 1 36 Right 2 WINDOW 3 1 72 Right 2 SYMATTR InstName L1 SYMATTR Value 345µ SYMATTR Type ind SYMATTR SpiceLine Rser=.1 SYMBOL ind2 384 -624 M0 WINDOW 0 -4 31 Right 2 WINDOW 3 -4 79 Right 2 SYMATTR InstName L2 SYMATTR Value 9.58µ SYMATTR Type ind SYMATTR SpiceLine Rser=50m SYMBOL voltage -576 -432 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 48 SYMBOL nmos 512 -400 R0 WINDOW 0 57 32 Left 2 WINDOW 3 54 71 Left 2 SYMATTR InstName Q2 SYMATTR Value BSC0901NSI SYMBOL nmos 704 -144 R0 WINDOW 0 51 27 Left 2 WINDOW 3 56 70 Left 2 SYMATTR InstName Q3 SYMATTR Value BSC0901NSI SYMBOL cap 624 -448 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 0 32 VBottom 2 WINDOW 39 -21 32 VBottom 2 SYMATTR InstName C5 SYMATTR Value 1n SYMATTR SpiceLine Rser=2.4 SYMBOL res -144 384 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R9 SYMATTR Value 50K SYMBOL ind2 304 -576 R0 WINDOW 0 -10 43 Right 2 WINDOW 3 2 76 Right 2 SYMATTR InstName L3 SYMATTR Value 86.25µ SYMATTR Type ind SYMATTR SpiceLine Rser=.1 SYMBOL schottky -32 -544 R0 SYMATTR InstName D1 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL schottky -32 -304 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value BAT54 SYMATTR Description Diode SYMATTR Type diode SYMBOL ind -144 -368 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L4 SYMATTR Value 1m SYMBOL cap -224 -368 R0 SYMATTR InstName C6 SYMATTR Value 1µ SYMBOL nmos 128 -272 M0 WINDOW 0 35 -10 Right 2 WINDOW 3 -7 64 Right 2 SYMATTR InstName Q4 SYMATTR Value BSH114 SYMBOL res 224 -384 R0 WINDOW 3 27 79 Left 2 SYMATTR InstName R10 SYMATTR Value 16.5K SYMBOL cap 224 -288 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7 SYMATTR Value .1µ SYMBOL res 304 -416 R0 SYMATTR InstName R11 SYMATTR Value 210K SYMBOL cap 352 -288 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 WINDOW 39 53 32 VTop 2 SYMATTR InstName C8 SYMATTR Value 1n SYMATTR SpiceLine Rpar=7.87K SYMBOL ind 800 -592 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L5 SYMATTR Value .85µ SYMBOL cap 960 -592 R0 WINDOW 123 35 78 Left 2 WINDOW 3 26 52 Left 2 SYMATTR Value2 X2 SYMATTR Value 100µ SYMATTR InstName C9 SYMATTR SpiceLine V=6.3 Irms=0 Rser=0.002 Lser=0 mfg="TDK" pn="C575OX5ROJI07M" type="X5R" SYMBOL polcap 1056 -592 R0 WINDOW 3 24 56 Left 2 WINDOW 123 41 80 Left 2 SYMATTR Value 220µ SYMATTR InstName C10 SYMATTR Description Capacitor SYMATTR Type cap SYMATTR SpiceLine V=6.3 Irms=3.2 Rser=0.012 Lser=0 mfg="KEMET" pn="T520V227M006ASE012" type="Tantalum" SYMBOL res 736 0 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R12 SYMATTR Value 100 SYMBOL cap 64 -176 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C11 SYMATTR Value 1µ SYMBOL res 1168 -608 R0 SYMATTR InstName Rload SYMATTR Value .165 TEXT 344 -656 Bottom 2 !K1 L1 L2 L3 1 TEXT 928 408 Left 2 !.tran 1.5m startup LINE Normal 344 -480 344 -656 2