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November2007Rev61/2121LM723HighprecisionvoltageregulatorFeatures■Inputvoltageupto40V■Outputvoltageadjustablefrom2to37V■Positiveornegativesupplyoperation■Series,shunt,switchingorfloatingoperation■Outputcurrentto150mAwithoutexternalpasstransistor■AdjustablecurrentlimitingDescriptionTheLM723isamonolithicintegratedprogrammablevoltageregulator,assembledin14-leaddualin-lineplasticpackage.Thecircuitprovidesinternalcurrentlimiting.Whentheoutputcurrentexceeds150mAanexternalNPNorPNPpasselementmaybeused.Provisionsaremadeforadjustablecurrentlimitingandremoteshut-down.DIP-14Table1.DevicesummaryOrdercodePackageLM723NDIP-14LM723CNDIP-14(topview)LM723Maximumratings5/213MaximumratingsTable2.AbsolutemaximumratingsSymbolParameterValueUnitLM723LM723CVIDCinputvoltage4040VΔVI-ODropoutvoltage4040VIOOutputcurrent150150mAIREFCurrentfromVREF1525mATOPOperatingTemperature-55to1250to70°CTSTGStorageTemperature-65to150-65to150°CTJJunctionTemperature150125°CTable3.ThermaldataSymbolParameterDIP14UnitRthJAThermalresistancejunction-ambientMax200°C/WCircuitLM7236/214CircuitNote:VI=12V;VO=5V;IO=1mA;R1/R2≤10kΩFigure3.Testcircuit(pinconfigurationrelativetotheplasticpackage)LM723Electricalcharacteristics7/215ElectricalcharacteristicsTable4.ElectricalcharacteristicsforLM723(refertothetestcircuits,TA=25°C,unlessotherwisespecified.)SymbolParameterTestconditionsMin.Typ.Max.UnitΔVO/ΔVILineregulationVI=12to15V0.010.1%VI=12to40V0.020.2VI=12to15V,TA=-55to125°C0.3ΔVO/VOLoadregulationIO=1to50mA0.030.15%IO=1to10mA,TA=-55to125°C0.6VREFReferencevoltageIREF=160µA6.957.157.35VSVRSupplyvoltagerejectionf=100Hzto10kHzCREF=074dBCREF=5µF86ΔVO/ΔTOutputvoltagedrift150ppm/°CISCOutputcurrentlimitRSC=10Ω,VO=0V65mAVIInputvoltagerange9.540VVOOutputvoltagerange237VVO-VI338VIdQuiescentcurrentVI=30V,IO=0mA2.35mAKVHLongtermstability0.1%/1000hrseNOutputnoisevoltageBW=100Hzto10kHzCREF=020µVCREF=5µF2.5ElectricalcharacteristicsLM7238/21Table5.ElectricalcharacteristicsforLM723C(refertothetestcircuits,TA=25°C,unlessotherwisespecified.)SymbolParameterTestconditionsMin.Typ.Max.UnitΔVO/ΔVILineregulationVI=12to15V0.010.1%VI=12to40V0.10.5VI=12to15V,TA=0to70°C0.3ΔVO/VOLoadregulationIO=1to50mA0.030.2%IO=1to10mA,TA=0to70°C0.6VREFReferencevoltageIREF=160µA6.87.157.5VSVRSupplyvoltagerejectionf=100Hzto10kHzCREF=074dBCREF=5µF86ΔVO/ΔTOutputvoltagedrift150ppm/°CISCOutputcurrentlimitRSC=10Ω,VO=0V65mAVIInputvoltagerange9.540VVOOutputvoltagerange237VVO-VI338VIdQuiescentcurrentVI=30V,IO=0mA2.34mAKVHLongtermstability0.1%/1000hrseNOutputnoisevoltageBW=100Hzto10kHzCREF=020µVCREF=5µF2.5LM723Typicalperformancecharacteristics9/216Typicalperformancecharacteristics(unlessotherwisespecifiedVO(NOM)=3.3V)Figure4.MaximumoutputcurrentvsvoltagedropFigure5.CurrentlimitingcharacteristicsFigure6.CurrentlimitingcharacteristicsvsjunctiontemperatureFigure7.LoadregulationcharacteristicswithoutcurrentlimitingFigure8.LoadregulationcharacteristicswithcurrentlimitingFigure9.LoadregulationcharacteristicswithcurrentlimitingTypicalperformancecharacteristicsLM72310/21Figure10.LineregulationvsvoltagedropFigure11.LoadregulationvsvoltagedropFigure12.QuiescentdraincurrentvsinputvoltageFigure13.LinetransientresponseFigure14.LoadtransientresponseFigure15.OutputimpedancevsfrequencyLM723Typicalperformancecharacteristics11/21Table6.Resistorvalues(kΩ)forstandardoutputvoltagesOutputVoltageApplicablefiguresFixedoutput±5%Outputadjustable±10%(1)R1R2R1P1R2+316,18,20,21,24,264.123.011.80.51.2+516,18,20,21,24,262.154.990.750.52.2+616,18,20,21,24,261.156.040.50.52.7+917,18,20,21,24,261.877.150.7512.7+1217,18,20,21,24,264.877.15213+1517,18,20,21,24,267.877.153.313+2817,18,20,21,24,26217.155.612+45223.5748.72.21039+75223.5778.72.21068+100223.571022.21091+250223.572552.210240-6(2)183.572.431.20.50.75-9183.485.361.20.52-12183.578.451.20.53.3-15183.6511.51.20.54.3-28183.5724.31.20.510-45233.5721.22.21033-100233.5797.62.21091-250233.572492.2102401.ReplaceR1/R2dividerwiththecircuitofFigure27.2.V+mustbeconnectedtoa+3Vorgreatersupply.Table7.FormulaforintermediateoutputvoltagesConditionsOutputsfrom2to7VFigure16,19,20,21,24,26VO=(VREFxR2)/(R1+R2)Outputsfrom4to250VFigure22VO=(VREF/2)x[(R2-R1)/R1];R3=R4CurrentLimitILIMIT=VSENSE/RSCOutputsfrom7to37VFigure17,19,20,21,24,26VO=VREFx[(R1+R2)/R2]Outputsfrom-6to-250VFigure18,Figure23VO=(VREF/2)x[(R1+R2)/R1];R3=R4FoldbackCurrentL