MCP1727-ADJEMF系列规格书,Datasheet 资料

©2007MicrochipTechnologyInc.DS21999B-page1MCP1727Features•1.5AOutputCurrentCapability•InputOperatingVoltageRange:2.3Vto6.0V•AdjustableOutputVoltageRange:0.8Vto5.0V•StandardFixedOutputVoltages:-0.8V,1.2V,1.8V,2.5V,3.0V,3.3V,5.0V•OtherFixedOutputVoltageOptionsAvailableUponRequest•LowDropoutVoltage:330mVTypicalat1.5A•TypicalOutputVoltageTolerance:0.5%•Stablewith1.0µFCeramicOutputCapacitor•FastresponsetoLoadTransients•LowSupplyCurrent:120µA(typ)•LowShutdownSupplyCurrent:0.1µA(typ)•AdjustableDelayonPowerGoodOutput•ShortCircuitCurrentLimitingandOvertemperatureProtection•3x3DFN-8andSOIC-8PackageOptionsApplications•High-SpeedDriverChipsetPower•NetworkingBackplaneCards•NotebookComputers•NetworkInterfaceCards•PalmtopComputers•2.5Vto1.XVRegulatorsDescriptionTheMCP1727isa1.5ALowDropout(LDO)linearregulatorthatprovideshighcurrentandlowoutputvoltagesinaverysmallpackage.TheMCP1727comesinafixed(oradjustable)outputvoltageversion,withanoutputvoltagerangeof0.8Vto5.0V.The1.5Aoutputcurrentcapability,combinedwiththelowoutputvoltagecapability,maketheMCP1727agoodchoicefornewsub-1.8VoutputvoltageLDOapplicationsthathavehighcurrentdemands.TheMCP1727isstableusingceramicoutputcapacitorsthatinherentlyprovideloweroutputnoiseandreducethesizeandcostoftheentireregulatorsolution.Only1µFofoutputcapacitanceisneededtostabilizetheLDO.UsingCMOSconstruction,thequiescentcurrentconsumedbytheMCP1727istypicallylessthan120µAovertheentireinputvoltagerange,makingitattractiveforportablecomputingapplicationsthatdemandhighoutputcurrent.Whenshutdown,thequiescentcurrentisreducedtolessthan0.1µA.Thescaled-downoutputvoltageisinternallymonitoredandapowergood(PWRGD)outputisprovidedwhentheoutputiswithin92%ofregulation(typical).AnexternalcapacitorcanbeusedontheCDELAYpintoadjustthedelayfrom200µsto300ms.Theovertemperatureandshortcircuitcurrent-limitingprovideadditionalprotectionfortheLDOduringsystemfaultconditions.PackageTypesVINVINSHDNGNDPWRGDCDELAYSenseVOUTVINVINSHDNGNDPWRGDCDELAYADJVOUTAdjustable(SOIC-8)Fixed(SOIC-8)VINVINSHDNGNDPWRGDCDELAYSenseVOUT1122334455667788Fixed(3x3DFN)VINVINSHDNGNDPWRGDCDELAYVOUTAdjustable(3x3DFN)ADJ12345678123456781.5A,LowVoltage,LowQuiescentCurrentLDORegulator芯天下--©2007MicrochipTechnologyInc.TypicalApplicationMCP1727AdjustableOutputVoltageVINSHDNGNDPWRGDCDELAYADJVOUT123456781µFPWRGDVOUT=1.2V@1A100kΩ4.7µFVIN=2.3Vto2.8VOnOffVIN20kΩ40kΩR1R2C1C2R31000pFC3MCP1727FixedOutputVoltageVINSHDNGNDPWRGDCDELAYSenseVOUT12345678PWRGDVOUT=1.8V@1AVIN=2.3Vto2.8VOnOffVIN1µF100kΩ4.7µFC1C2R11000pFC3芯天下--©2007MicrochipTechnologyInc.DS21999B-page3MCP1727FunctionalBlockDiagram-AdjustableOutputEA+–VOUTPMOSRfCfISNSOvertemperatureVREFComp92%ofVREFTDELAYPWRGDCDELAYVINDriverw/limitandSHDNGNDSoft-StartADJUndervoltageLockOutVINReferenceSHDNSHDNSHDNSensing(UVLO)芯天下--©2007MicrochipTechnologyInc.FunctionalBlockDiagram-FixedOutputEA+–VOUTPMOSRfCfISNSOvertemperatureVREFComp92%ofVREFTDELAYPWRGDCDELAYVINDriverw/limitandSHDNGNDSoft-StartSenseUndervoltageLockOutVINReferenceSHDNSHDNSHDNSensing(UVLO)芯天下--©2007MicrochipTechnologyInc.DS21999B-page5MCP17271.0ELECTRICALCHARACTERISTICSAbsoluteMaximumRatings†VIN....................................................................................6.5VMaximumVoltageonAnyPin..(GND–0.3V)to(VDD+0.3)VMaximumPowerDissipation.........Internally-Limited(Note6)OutputShortCircuitDuration................................ContinuousStoragetemperature.....................................-65°Cto+150°CMaximumJunctionTemperature,TJ...........................+150°CESDprotectiononallpins(HBM/MM)...........≥2kV;≥200V†Notice:Stressesabovethoselistedunder“MaximumRat-ings”maycausepermanentdamagetothedevice.Thisisastressratingonlyandfunctionaloperationofthedeviceatthoseoranyotherconditionsabovethoseindicatedintheoperationallistingsofthisspecificationisnotimplied.Expo-suretomaximumratingconditionsforextendedperiodsmayaffectdevicereliability.AC/DCCHARACTERISTICSElectricalSpecifications:Unlessotherwisenoted,VIN=VOUT(MAX)+VDROPOUT(MAX)(Note1),VR=1.8VforAdjustableOutput,IOUT=1mA,CIN=COUT=4.7µF(X7RCeramic),TA=+25°C.Boldfacetypeappliesforjunctiontemperatures,TJ(Note7)of-40°Cto+125°CParametersSymMinTypMaxUnitsConditionsInputOperatingVoltageVIN2.36.0VNote1InputQuiescentCurrentIq—120220µAIL=0mA,VIN=Note1,VOUT=0.8Vto5.0VInputQuiescentCurrentforSHDNModeISHDN—0.13µASHDN=GNDMaximumOutputCurrentIOUT1.5——AVIN=2.3Vto6.0VVR=0.8Vto5.0V,Note1LineRegulationΔVOUT/(VOUTxΔVIN)—0.050.16%/V(Note1)≤VIN≤6VLoadRegulationΔVOUT/VOUT-1.0±0.51.0%IOUT=1mAto1.5A,VIN=Note1,(Note4)OutputShortCircuitCurrentIOUT_SC—2.2—AVIN=Note1,RLOAD0.1Ω,PeakCurrentAdjustPinCharacteristics(AdjustableOutputOnly)AdjustPinReferenceVoltageVADJ0.4020.4100.418VVIN=2.3VtoVIN=6.0V,IOUT=1mAAdjustPinLeakageCurrentIADJ-10±0.01+10nAVIN=6.0V,VADJ=0Vto6VAdjustTemperatureCoefficientTCVOUT—40—ppm/°CNote3Fixed-OutputCharacteristics(FixedOutputOnly)VoltageRegulationVOUTVR-2.5%VR±0.5%VR+2.5%VNote2Note1:TheminimumVINmustmeettwo