LM109,LM309 LM109/LM309 5-Volt Regulator Literature Number: SNVS752A

L April1998 M 1 0 9 / L LM109/LM309 M 3 5-Volt Regulator 0 9 General Description does improve transient response somewhat. Input bypass- 5 - ing is needed, however, if the regulator is located very far V TheLM109seriesarecomplete5Vregulatorsfabricatedon fromthefiltercapacitorofthepowersupply.Stabilityisalso o asinglesiliconchip.Theyaredesignedforlocalregulation achievedbymethodsthatprovideverygoodrejectionofload lt on digital logic cards, eliminating the distribution problems orlinetransientsasareusuallyseenwithTTLlogic. R association with single-point regulation. The devices are Althoughdesignedprimarilyasafixed-voltageregulator,the e available in two standard transistor packages. In the outputoftheLM109seriescanbesettovoltagesabove5V, g solid-kovar TO-5 header, it can deliver output currents in asshown.Itisalsopossibletousethecircuitsasthecontrol u excessof200mA,ifadequateheatsinkingisprovided.With element in precision regulators, taking advantage of the la the TO-3 power package, the available output current is good current-handling capability and the thermal overload t greaterthan1A. o protection. r Theregulatorsareessentiallyblowoutproof.Currentlimiting isincludedtolimitthepeakoutputcurrenttoasafevalue.In Features addition, thermal shutdown is provided to keep the IC from overheating. If internal dissipation becomes too great, the n Specifiedtobecompatible,worstcase,withTTLand regulatorwillshutdowntopreventexcessiveheating. DTL Considerable effort was expended to make these devices n Outputcurrentinexcessof1A easytouseandtominimizethenumberofexternalcompo- n Internalthermaloverloadprotection nents.Itisnotnecessarytobypasstheoutput,althoughthis n Noexternalcomponentsrequired Schematic Diagram DS007138-1 ©2001NationalSemiconductorCorporation DS007138 www.national.com

9 0 3 Absolute Maximum Ratings (Note 1) OperatingJunctionTemperatureRange M L If Military/Aerospace specified devices are required, LM109 −55˚Cto+150˚C 9/ 0 pleasecontacttheNationalSemiconductorSalesOffice/ LM309 0˚Cto+125˚C M1 Distributorsforavailabilityandspecifications. StorageTemperatureRange −65˚Cto+150˚C L InputVoltage 35V LeadTemperature PowerDissipation InternallyLimited (Soldering,10sec.) 300˚C Electrical Characteristics (Note 2) Parameter Conditions LM109 LM309 Units Min Typ Max Min Typ Max OutputVoltage T = 25˚C 4.7 5.05 5.3 4.8 5.05 5.2 V j LineRegulation T = 25˚C 4.0 50 4.0 50 mV j 7.10V£ V £ 25V IN LoadRegulation T = 25˚C j TO-39Package 5mA£ I £ 0.5A 15 50 15 50 mV OUT TO-3Package 5mA£ I £ 1.5A 15 100 15 100 mV OUT OutputVoltage 7.40V£ V £ 25V, 4.6 5.4 4.75 5.25 V IN 5mA£ I £ I , OUT MAX P < P MAX QuiescentCurrent 7.40V£ V £ 25V 5.2 10 5.2 10 mA IN QuiescentCurrentChange 7.40V£ V £ 25V 0.5 0.5 mA IN 5mA£ I £ I 0.8 0.8 mA OUT MAX OutputNoiseVoltage T = 25˚C 40 40 µV A 10Hz£ f£ 100kHz LongTermStability 10 20 mV RippleRejection T = 25˚C 50 50 dB j ThermalResistance, (Note3) JunctiontoCase TO-39Package 15 15 ˚C/W TO-3Package 2.5 2.5 ˚C/W Note1: “AbsoluteMaximumRatings”indicatelimitsbeyondwhichdamagetothedevicemayoccur.OperatingRatingsindicateconditionsforwhichthedeviceis functional,butdonotguaranteespecificperformancelimits. Note2: Unlessotherwisespecified,thesespecificationsapply−55˚C£ Tj£ +150˚CfortheLM109and0˚C£ Tj£ +125˚CfortheLM309;VIN=10V;andIOUT= 0.1AfortheTO-39packageorIOUT=0.5AfortheTO-3package.FortheTO-39package,IMAX=0.2AandPMAX=2.0W.FortheTO-3package,IMAX=1.0Aand PMAX=20W. Note3: Withoutaheatsink,thethermalresistanceoftheTO-39packageisabout150˚C/W,whilethatoftheTO-3packageisapproximately35˚C/W.Withaheat sink,theeffectivethermalresistancecanonlyapproachthevaluesspecified,dependingontheefficiencyofthesink. Note4: RefertoRETS109HdrawingforLM109HorRETS109KdrawingforLM109Kmilitaryspecifications. Connection Diagrams MetalCanPackages DS007138-33 OrderNumberLM109H,LM109H/883orLM309H DS007138-34 SeeNSPackageNumberH03A OrderNumberLM109KSTEELor LM309KSTEEL SeeNSPackageNumberK02A OrderNumberLM109K/883 SeeNSPackageNumberK02C www.national.com 2

L M Application Hints 5. Preventing latchoff for loads connected to negative 1 voltage: 0 1. BypasstheinputoftheLM109togroundwith‡ 0.2µF 9 If the output of the LM109 is pulled negative by a high /L ceramicorsolidtantalumcapacitorifmainfiltercapaci- current supply so that the output pin is more than 0.5V M torismorethan4inchesaway. 3 negativewithrespecttothegroundpin,theLM109canlatch 0 2. Avoidinsertionofregulatorinto“live”socketifinput off.Thiscanbepreventedbyclampingthegroundpintothe 9 voltageisgreaterthan10V.Theoutputwillrisetowithin outputpinwithagermaniumorSchottkydiodeasshown.A 2V of the unregulated input if the ground pin does not silicondiode(1N4001)attheoutputisalsoneededtokeep makecontact,possiblydamagingtheload.TheLM109 the positive output from being pulled too far negative. The may also be damaged if a large output capacitor is 10W resistorwillraise+V by» 0.05V. chargedup,thendischargedthroughtheinternalclamp OUT zenerwhenthegroundpinmakescontact. 3. The output clamp zener is designed to absorb tran- sients only. It will not clamp the output effectively if a failure occurs in the internal power transistor structure. Zener dynamic impedance is » 4W . Continuous RMS currentintothezenershouldnotexceed0.5A. 4. Paralleling of LM109s for higher output current is not recommended.Currentsharingwillbealmostnonexist- ent,leadingtoacurrentlimitmodeoperationfordevices with the highest initial output voltage. The current limit devicesmayalsoheatuptothethermalshutdownpoint (» 175˚C). Long term reliability cannot be guaranteed DS007138-7 undertheseconditions. Crowbar Overvoltage Protection InputCrowbar OutputCrowbar DS007138-8 DS007138-9 *ZenerisinternaltoLM109. **Q1mustbeabletowithstand7Acontinuouscurrentiffusingisnotused atregulatorinput.LM109bondwireswillfuseatcurrentsabove7A. †Q2isselectedforsurgecapability.Considerationmustbegiventofilter capacitorsize,transformerimpedance,andfuseblowingtime. ††Trippointis» 7.5V. Typical Performance Characteristics MaximumAverage MaximumAverage OutputImpedance PowerDissipation(LM109K) PowerDissipation(LM309K) DS007138-18 DS007138-16 DS007138-17 3 www.national.com

9 0 3 Typical Performance Characteristics (Continued) M L 9/ 10 MaximumAverage MaximumAverage RippleRejection M PowerDissipation(LM109H) PowerDissipation(LM309H) L DS007138-21 DS007138-19 DS007138-20 CurrentLimit ThermallyInducedOutput RippleRejection Characteristics(Note5) VoltageVariation DS007138-24 DS007138-22 DS007138-23 Note5: Currentlimitingfoldbackcharacteristicsaredeterminedbyinputoutputdifferential,notbyoutputvoltage. Input-OutputDifferential(V) OutputVoltage(V) OutputVoltage(V) DS007138-25 DS007138-26 DS007138-27 www.national.com 4

L Typical Performance Characteristics M (Continued) 1 0 9 /L QuiescentCurrent QuiescentCurrent OutputVoltageNoise M 3 0 9 DS007138-28 DS007138-29 DS007138-30 LineTransientResponse LoadTransientResponse DS007138-31 DS007138-32 Typical Applications Fixed5VRegulator AdjustableOutputRegulator DS007138-4 DS007138-2 *Requiredifregulatorislocatedmorethan4"frompowersupplyfilter capacitor. †Althoughnooutputcapacitorisneededforstability,itdoesimprove transientresponse. C2shouldbeusedwheneverlongwiresareusedtoconnecttotheload, orwhentransientresponseiscritical. Note:Pin3electricallyconnectedtocase. 5 www.national.com

9 0 3 Typical Applications (Continued) M L 9/ 0 HighStabilityRegulator* 1 M L DS007138-5 *Regulationbetterthan0.01%,load,lineandtemperature,canbeobtained. †Determineszenercurrent.Maybeadjustedtominimizethermaldrift. ‡Solidtantalum. CurrentRegulator DS007138-6 *Determinesoutputcurrent.Ifwirewoundresistorisused,bypasswith0.1µF. www.national.com 6

L M Physical Dimensions inches (millimeters) unless otherwise noted 1 0 9 /L M 3 0 9 MetalCanPackage(H) OrderNumberLM109H,LM109H/883orLM309H NSPackageNumberH03A MetalCanPackage(K) OrderNumberLM109KSTEEL,LM309KSTEEL NSPackageNumberK02A 7 www.national.com

r o Physical Dimensions t inches (millimeters) unless otherwise noted (Continued) a l u g e R t l o V - 5 9 0 3 M L / 9 0 1 M L MetalCanPackage(K) Mil-AeroProduct OrderNumberLM109K/883 NSPackageNumberK02C LIFESUPPORTPOLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSELOFNATIONALSEMICONDUCTORCORPORATION.Asusedherein: 1. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform into the body, or (b) support or sustain life, and can be reasonably expected to cause the failure of whose failure to perform when properly used in the life support device or system, or to affect its accordance with instructions for use provided in the safetyoreffectiveness. labeling, can be reasonably expected to result in a significantinjurytotheuser. NationalSemiconductor NationalSemiconductor NationalSemiconductor NationalSemiconductor Corporation Europe AsiaPacificCustomer JapanLtd. Americas Fax: +49(0)180-5308586 ResponseGroup Tel: 81-3-5639-7560 Email:support@nsc.com Email: europe.support@nsc.com Tel:65-2544466 Fax:81-3-5639-7507 Deutsch Tel: +49(0)6995086208 Fax:65-2504466 English Tel: +44(0)8702402171 Email:ap.support@nsc.com www.national.com FrançaisTel: +33(0)141918790 Nationaldoesnotassumeanyresponsibilityforuseofanycircuitrydescribed,nocircuitpatentlicensesareimpliedandNationalreservestherightatanytimewithoutnoticetochangesaidcircuitryandspecifications.

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