LM317 Status: ACTIVE

3/4 Pin 1.5A Adjustable Positive Voltage Regulator

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Datasheet

3-Terminal Adjustable Regulator (Rev. U) (PDF 989 KB)
04 Apr 2008

	LM317	LM317L	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/Package	2PFM, 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
	Samples	Samples	Samples
	Inventory	Inventory	Inventory

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TL431A: Adjustable Precision Shunt Regulator

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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

				Price	Packaging			CAD Design Tools		Samples
Device	Status	Temp (^oC)	Replaced By	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Footprints	Samples
LM317DCY	ACTIVE	0 to 125		0.40 \| 1ku	SOT-223 (DCY) \| 4	View	80 \| TUBE	Contact TI Distributor or Sales Office
LM317DCYG3	ACTIVE	0 to 125		0.40 \| 1ku	SOT-223 (DCY) \| 4	View	80 \| TUBE	Contact TI Distributor or Sales Office
LM317DCYR	ACTIVE	0 to 125		0.36 \| 1ku	SOT-223 (DCY) \| 4	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
LM317DCYRG3	ACTIVE	0 to 125		0.36 \| 1ku	SOT-223 (DCY) \| 4	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
LM317KC	OBSOLETE	0 to 125	LM317KCS	0.45 \| 1ku	TO-220 (KC) \| 3	View		Replaced by LM317KCS
LM317KCE3	OBSOLETE	0 to 125		0.45 \| 1ku	TO-220 (KC) \| 3	View		Not Available
LM317KCS	ACTIVE	0 to 125		0.38 \| 1ku	TO-220 (KCS) \| 3		50 \| TUBE	Contact TI Distributor or Sales Office
LM317KCSE3	ACTIVE	0 to 125		0.38 \| 1ku	TO-220 (KCS) \| 3		50 \| TUBE	Contact TI Distributor or Sales Office
LM317KTER	OBSOLETE	0 to 125		0.49 \| 1ku	(KTE) \| 3				Not Available
LM317KTTR	ACTIVE	0 to 125		0.36 \| 1ku	DDPAK/TO-263 (KTT) \| 3	View	500 \| LARGE T&R
LM317KTTRG3	ACTIVE	0 to 125		0.36 \| 1ku	DDPAK/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

Reported Distributor Inventory as of 11:58 AM GMT, 26 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 12 WeeksLM317DCY
Americas	Arrow	>1k
	Avnet	>1k
	Newark	638
	Rochester Electronics	>1k
Europe	Abacus Polar	>1k
Worldwide	DigiKey	329
Worldwide	Mouser Electronics	135
TI Lead Time*: 12 WeeksLM317DCYG3
Americas	Avnet	780
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 12 WeeksLM317DCYR
Americas	Arrow	337
	Newark	>1k
	Rochester Electronics	>1k
Asia	WPI	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 12 WeeksLM317DCYRG3
Americas	Arrow	>1k
Worldwide	DigiKey	Available
Call**LM317KC
Americas	Rochester Electronics	>1k
Asia	WPI	100
TI Lead Time*: 12 WeeksLM317KCS
Americas	Arrow	1k
	Avnet	1k
	Rochester Electronics	>1k
Worldwide	DigiKey	111
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 12 WeeksLM317KCSE3
Asia	WPI	400
Europe	EBV Elektronik	50
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
Call**LM317KTER
Americas	Rochester Electronics	>1k
TI Lead Time*: 12 WeeksLM317KTTR
Americas	Arrow	500
Americas	Newark	>1k
Asia	Farnell Asia	>1k
Asia	WPI	119
Europe	Avnet-SILICA	>1k
Worldwide	DigiKey	469
Worldwide	Mouser Electronics	999
TI Lead Time*: 12 WeeksLM317KTTRG3
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
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 Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
LM317DCY	Green (RoHS & no Sb/Br)	CU SN	Level-2-260C-1 YEAR	View	View
LM317DCYG3	Green (RoHS & no Sb/Br)	CU SN	Level-2-260C-1 YEAR	View	View
LM317DCYR	Green (RoHS & no Sb/Br)	CU SN	Level-2-260C-1 YEAR	View	View
LM317DCYRG3	Green (RoHS & no Sb/Br)	CU SN	Level-2-260C-1 YEAR	View	View
LM317KCS	Pb-Free (RoHS)	CU SN	N/A for Pkg Type	View	View
LM317KCSE3	Pb-Free (RoHS)	CU SN	N/A for Pkg Type	View	View
LM317KTTR	Green (RoHS & no Sb/Br)	CU SN	Level-3-245C-168 HR	View	View
LM317KTTRG3	Green (RoHS & no Sb/Br)	CU SN	Level-3-245C-168 HR	View	View

* 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

Datasheet

3-Terminal Adjustable Regulator (Rev. U) (PDF, 989 KB)
04 Apr 2008

Application Notes

LDO PSRR Measurement Simplified (HTM, 8 KB) 1187 views
27 Jul 2009 Read Abstract
LDO Noise Demystified (HTM, 8 KB) 1162 views
30 Jun 2009 Read Abstract

View Application Notes for Standard Voltage Regulators

User Guides

DV2002L2/TL2 Fast Charge Development System Control of LM317 Linear Regulator (Rev. A) (PDF, 71 KB) 4553 views
28 Mar 1998

Selection Guides

Standard Linear Products Cross-Reference (Rev. D) (PDF, 1169 KB) 33381 views
05 May 2006

Part #	Name	Product Family	Comments
LM317L	3/8 Pin 100mA Adjustable Positive Regulator	LINEAR REGULATORS - STANDARD VOLTAGE REGULATORS	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	LINEAR REGULATORS - STANDARD VOLTAGE REGULATORS	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	LINEAR REGULATORS - STANDARD VOLTAGE REGULATORS	The TL317 has a low voltage dropout.
UA7805	3 Pin 1.5A Fixed 5V Positive Voltage Regulator	LINEAR REGULATORS - STANDARD VOLTAGE REGULATORS	UA780x offers only fixed voltage options and does not have the same specification as the LM317.
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LM317 Status: ACTIVE

3/4 Pin 1.5A Adjustable Positive Voltage Regulator

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