LM3173-TERMINAL ADJUSTABLE REGULATORSLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001DOutput Voltage Range Adjustable FromDDDDD1.2 V to 37 VOutput Current Greater Than 1.5 AInternal Short-Circuit Current LimitingThermal Overload ProtectionOutput Safe-Area CompensationPackage Options Include PlasticSmall-Outline Transistor SOT-223 (DCY),Flange Mounted (KTE) and Heat-SinkMounted (KC) PackagesKC PACKAGE(TOP VIEW)INPUTOUTPUTADJUSTThe OUTPUT terminal is in electricalcontact with the mounting base.TO-220ABIOAdescriptionThe LM317 is an adjustable three-terminalpositive-voltage regulator capable of supplyingmore than 1.5 A over an output-voltage range of1.2 V to 37 V. It is exceptionally easy to use andrequires only two external resistors to set theoutput voltage. Furthermore, both line and loadregulation are better than standard fixedregulators. The LM317 is packaged in the KC(TO-220AB) and KTE packages, which are easyto handle and use.In addition to having higher performance thanfixed regulators, this device includes on-chipcurrent limiting, thermal overload protection, andsafe-operating-area protection. All overloadprotection remains fully functional, even if theADJUST terminal is disconnected.The LM317 is versatile in its applications,including uses in programmable output regulationand local on-card regulation. Or, by connecting afixed resistor between the ADJUST and OUTPUTterminals, the LM317 can function as a precisioncurrent regulator. An optional output capacitor canbe added to improve transient response. TheADJUST terminal can be bypassed to achievevery high ripple-rejection ratios, which are difficultto achieve with standard three-terminalregulators.The LM317 is characterized for operation over thevirtual junction temperature range of 0°C to125°C.KTE PACKAGE(TOP VIEW)INPUTOUTPUTADJUSTThe OUTPUT terminal is in electricalcontact with the mounting base.IOADCY PACKAGE(TOP VIEW)INPUTOUTPUTADJUSTPlease be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.PRODUCTION DATA nformaton s current as of publcaton date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.Copyright 2001, Texas Instruments IncorporatedPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•1LM3173-TERMINAL ADJUSTABLE REGULATORSLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001AVAILABLE OPTIONSPACKAGED DEVICESTJ0°C to 125°CHEAT-SINK(DCY)†LM317DCYHEAT-SINKMOUNTED, TO-220(KC)LM317KCPLASTIC FLANGEMOUNTED, POWER FLEX(KTE)‡LM317KTER†The DCY package also is available taped and reeled, e.g., LM317DCYR.‡The KTE package has the same footprint as TO-263 and can be mounted on a TO-263land pattern. The KTE package is only available taped and reeled.schematic diagramINPUTOUTPUTADJUSTabsolute maximum ratings over virtual junction temperature range (unless otherwise noted)§§Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfunctional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is notimplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.NOTES:1.Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowableambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.2.The package thermal impedance is calculated in accordance with JESD 51-5.3.The package thermal impedance is calculated in accordance with JESD 51-7.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VInput-to-output differential voltage, VI – VO 40 Package thermal impedance, θJA (see Notes 1 and 2):DCY package . . . . . . . . . . . . . . . . . . . . . . . . . 49°C/W(see Notes 1 and 3):KC package . . . . . . . . . . . . . . . . . . . . . . . . . . . 25°C/W(see Notes 1 and 2):KTE package . . . . . . . . . . . . . . . . . . . . . . . . . 23°C/WLead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°CStorage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°Crecommended operating conditionsMINVI – VOIOTJInput-to-output voltage differentialOutput currentOperating virtual junction temperature03MAX371.5125UNITVA°C2POST OFFICE BOX 655303 DALLAS, TEXAS 75265•LM3173-TERMINAL ADJUSTABLE REGULATORSLVS044H – SEPTEMBER 1997 – REVISED DECEMBER 2001electrical characteristics over recommended ranges of operating virtual junction temperature(unless otherwise noted)PARAMETERInput voltage (line) regulationInputvoltage(line)regulation‡VI – VVO = 3 V to 40 V=3Vto40VCADJ = 10 µF§,TJ = 25°CTJ = 0=0°CC to 125to125°C20-ms pulse,TJ = 25°CTEST CONDITIONS†TJ = 25°CTJ = 0°C to 125°CVO ≤ 5 VVO ≥ 5 VVO ≤ 5 VVO ≥ 5 VMINTYP0.010.020.1200.30.0350VI – VO = 2.5 V to 40 V, PD ≤20 W, IO = 10 mA to 1500 mAVI – VO = 3 V to 40 V, PD ≤20 W, IO = 10 mA to 1500 mATJ = 0°C to 125°CVI – VO = 40 VVI – VO ≤ 15 V,PD
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,enhancements, improvements, and other changes to its products and services at any time and to discontinueany product or service without notice. Customers should obtain the latest relevant information before placingorders and should verify that such information is current and complete. All products are sold subject to TI’s termsand conditions of sale supplied at the time of order acknowledgment.TI warrants performance of its hardware products to the specifications applicable at the time of sale inaccordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TIdeems necessary to support this warranty. Except where mandated by government requirements, testing of allparameters of each product is not necessarily performed.
TI assumes no liability for applications assistance or customer product design. Customers are responsible fortheir products and applications using TI components. To minimize the risks associated with customer productsand applications, customers should provide adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or processin which TI products or services are used. Information published by TI regarding third–party products or servicesdoes not constitute a license from TI to use such products or services or a warranty or endorsement thereof.Use of such information may require a license from a third party under the patents or other intellectual propertyof the third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of information in TI data books or data sheets is permissible only if reproduction is withoutalteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproductionof this information with alteration is an unfair and deceptive business practice. TI is not responsible or liable forsuch altered documentation.
Resale of TI products or services with statements different from or beyond the parameters stated by TI for thatproduct or service voids all express and any implied warranties for the associated TI product or service andis an unfair and deceptive business practice. TI is not responsible or liable for any such statements.
Mailing Address:Texas Instruments
Post Office Box 655303Dallas, Texas 75265
Copyright 2001, Texas Instruments Incorporated