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LM317 Status: ACTIVE

3/4 Pin 1.5A Adjustable Positive Voltage Regulator

      
         
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See Also

  • LM317L - The LM317L is very similar to the LM317 but LM317L has and output current of 100 mA.
  • LM317M - The LM317M is very similar to the LM317 but LM317M has an output current of 500 mA.
  • TL317 - The TL317 has a low voltage dropout.

View all related products


Datasheet

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 LM317LM317L LM317M 
Vout(Min)(V)1.25  1.2  1.25  
Vout(Max)(V)37  32  37  
Iout(Max)(A)1.5  0.1  0.5  
Vdo(Max)(V)3  2.5  3  
Vin(Min)(V)4.2  3.7  4.2  
Vin(Max)(V)40  38  40  
Pin/Package2PFM, 3DDPAK/TO-263, 3TO-220, 4SOT-223  3SOT-89, 3TO-92, 8SOIC, 8TSSOP  3PFM, 4SOT-223  
Approx. Price (US$) 0.36 | 1ku   0.14 | 1ku   0.36 | 1ku  
 SamplesSamplesSamples
 InventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • LM337: 3 Pin 1.5A Adjustable Negative Voltage Regulator
  • LM317M: 3/4 Pin 500mA Adjustable Positive Voltage Regulator
  • LM317L: 3/8 Pin 100mA Adjustable Positive Regulator
  • TPS61020: Adjustable, 1.5-A Switch, 96% Efficient Boost Converter with Down-Mode, QFN-10
  • TLV431A: Low Voltage Adjustable Precision Shunt Regulator
  • TPS40055: Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source/sink

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Product Information

Features

  • Output Voltage Range Adjustable From 1.25 V to 37 V
  • Output Current Greater Than 1.5 A
  • Internal Short-Circuit Current Limiting
  • Thermal Overload Protection
  • Output Safe-Area Compensation

PowerFLEX, PowerPAD are trademarks of Texas Instruments.

DESCRIPTION/ORDERING INFORMATION

The LM317 is an adjustable three-terminal positive-voltage regulator capable of supplying more than 1.5 A over an output-voltage range of 1.25 V to 37 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage. Furthermore, both line and load regulation are better than standard fixed regulators.

In addition to having higher performance than fixed regulators, this device includes on-chip current limiting, thermal overload protection, and safe operating-area protection. All overload protection remains fully functional, even if the ADJUST terminal is disconnected.

The LM317 is versatile in its applications, including uses in programmable output regulation and local on-card regulation. Or, by connecting a fixed resistor between the ADJUST and OUTPUT terminals, the LM317 can function as a precision current regulator. An optional output capacitor can be added to improve transient response. The ADJUST terminal can be bypassed to achieve very high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Replaced ByPrice | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
LM317DCYACTIVE0 to 125 0.40 | 1kuSOT-223 (DCY) | 4 View 80 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317DCYG3ACTIVE0 to 125 0.40 | 1kuSOT-223 (DCY) | 4 View 80 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317DCYRACTIVE0 to 125 0.36 | 1kuSOT-223 (DCY) | 4 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317DCYRG3ACTIVE0 to 125 0.36 | 1kuSOT-223 (DCY) | 4 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317KCOBSOLETE0 to 125LM317KCS0.45 | 1kuTO-220 (KC) | 3 View   Download CAD Format for this Symbol Download CAD Format for this FootprintReplaced by LM317KCS
LM317KCE3OBSOLETE0 to 125 0.45 | 1kuTO-220 (KC) | 3 View   Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
LM317KCSACTIVE0 to 125 0.38 | 1kuTO-220 (KCS) | 3  50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317KCSE3ACTIVE0 to 125 0.38 | 1kuTO-220 (KCS) | 3  50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
LM317KTEROBSOLETE0 to 125 0.49 | 1ku(KTE) | 3    Download CAD Format for this Symbol Not Available
LM317KTTRACTIVE0 to 125 0.36 | 1kuDDPAK/TO-263 (KTT) | 3 View 500 | LARGE T&R  
LM317KTTRG3ACTIVE0 to 125 0.36 | 1kuDDPAK/TO-263 (KTT) | 3 View 500 | LARGE T&R  

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

  TI Inventory Status Reported Distributor Inventory
LM317DCYAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasArrow >1k
 Avnet >1k
 DigiKey >1k
 Mouser Electronics 548
 Newark 733
 Rochester Electronics >1k
 EuropeAbacus Polar >1k
LM317DCYG3As of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 4 Weeks AmericasAvnet 780
 DigiKey  Available
 Mouser Electronics 656
 Rochester Electronics >1k
LM317DCYRAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 6 Weeks AmericasArrow >1k
 Avnet >1k
 DigiKey >1k
 Mouser Electronics >1k
 Newark 439
 Rochester Electronics >1k
 AsiaWPI >1k
LM317DCYRG3As of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 6 Weeks AmericasArrow >1k
 DigiKey  Available
 Mouser Electronics >1k
LM317KCAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 Call**AmericasRochester Electronics >1k
LM317KCSAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 7 Weeks AmericasArrow 1k
 Avnet >1k
 DigiKey 158
 Mouser Electronics >1k
 Rochester Electronics >1k
LM317KCSE3As of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 7 Weeks AmericasDigiKey >1k
 Mouser Electronics 800
LM317KTERAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 Call**AmericasRochester Electronics >1k
 AsiaWPI >1k
LM317KTTRAs of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 Weeks AmericasMouser Electronics >1k
 Newark 354
 AsiaWPI 199
 EuropeAvnet-SILICA >1k
 Spoerle 500
LM317KTTRG3As of 11:24 AM GMT, 03 Jul 2009As of 11:24 AM GMT, 03 Jul 2009
 Lead TimeRegionCompanyIn StockPurchase
 8 Weeks AmericasMouser Electronics >1k
 EuropeEBV Elektronik 500
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
LM317DCY RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
LM317DCYG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
LM317DCYR RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
LM317DCYRG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
LM317KCS RoHS Compliant Pb-Free (RoHS) CU SN N/A for Pkg TypeViewView
LM317KCSE3 RoHS Compliant Pb-Free (RoHS) CU SN N/A for Pkg TypeViewView
LM317KTTR RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HRViewView
LM317KTTRG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-3-245C-168 HRViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for LM317 Help

Datasheet

User Guides

Selection Guides

Part # Name Product Family Comments
LM317L   3/8 Pin 100mA Adjustable Positive Regulator     The LM317L is very similar to the LM317 but LM317L has and output current of 100 mA.  
LM317M   3/4 Pin 500mA Adjustable Positive Voltage Regulator     The LM317M is very similar to the LM317 but LM317M has an output current of 500 mA.  
TL317   3/8 Pin 100mA Adjustable Positive Voltage Regulator     The TL317 has a low voltage dropout.  
UA7805   3 Pin 1.5A Fixed 5V Positive Voltage Regulator     UA780x offers only fixed voltage options and does not have the same specification as the LM317.  
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