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  • The LM217, LM317 are monolithic integrated circuits in TO-220, TO-220FP and D²PAK packages intended for use as positive adjustable voltage regulators.

    They are designed to supply more than 1.5 A of load current with an output voltage adjustable over a 1.2 to 37 V range.
    The nominal output voltage is selected by means of a resistive divider, making the device exceptionally easy to use and eliminating the stocking of many fixed regulators.

    Key Features

    • Output voltage range: 1.2 to 37 V
    • Output current in excess of 1.5 A
    • 0.1% line and load regulation
    • Floating operation for high voltages
    • Complete series of protections: current limiting, thermal shutdown and SOA control

Recommended for you

CAD/EDA Symbols, Footprints and Models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LM317BT
Active
TO-220 Industrial Ecopack2
LM317D2T-TR
Active
D2PAK Industrial Ecopack2
LM317P
Active
TO-220FP Industrial Ecopack2
LM317T
Active
TO-220 Industrial Ecopack2
LM317T-DG
Active
TO-220 Industrial Ecopack2 (**)

LM317BT

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LM317D2T-TR

Package:

D2PAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LM317P

Package:

TO-220FP

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220FP

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LM317T

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

LM317T-DG

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
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Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
LM317D2T-TR Available at 11 distributors

Distributor availability ofLM317D2T-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 11426 1 Order Now
COMPEL EUROPE 24319 1 Order Now
RS COMPONENTS EUROPE 8075 5 Order Now
AVNET AMERICA 64000 0 Order Now
FUTURE WORLDWIDE 631 1 Order Now
ARROW EUROPE 44003 0 Order Now
ARROW AMERICA 1000 1000 Order Now
MOUSER WORLDWIDE 4889 1 Order Now
Farnell Element14 EUROPE 12347 1 Order Now
ANGLIA Live EUROPE 5000 1000 Order Now
RUTRONIK EUROPE 1000 1000 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

11426

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

24319

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

8075

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

64000

Min.Order

0

Region

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Stock

631

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1

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Stock

44003

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0

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1000

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1000

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4889

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1

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Stock

12347

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1

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ANGLIA Live

Stock

5000

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1000

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RUTRONIK

Stock

1000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

Buy Direct
Active
EAR99 NEC Tape And Reel D2PAK 0 125 CHINA 0.32 / 1k
LM317BT Available at 5 distributors

Distributor availability ofLM317BT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9916 1 Order Now
RS COMPONENTS EUROPE 1370 50 Order Now
ARROW EUROPE 5058 0 Order Now
MOUSER WORLDWIDE 2039 1 Order Now
Farnell Element14 EUROPE 817 1 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

9916

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1370

Min.Order

50

Region

EUROPE Order Now

ARROW

Stock

5058

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2039

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

817

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

Buy Direct
Active
EAR99 NEC Tube TO-220 -40 125 CHINA 0.23 / 1k
LM317T-DG Available at 10 distributors

Distributor availability ofLM317T-DG

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6242 1 Order Now
COMPEL EUROPE 532 1 Order Now
RS COMPONENTS EUROPE 450 25 Order Now
AVNET AMERICA 22762 0 Order Now
ARROW EUROPE 16987 0 Order Now
Newark Element14 AMERICA 119 0 Order Now
ARROW AMERICA 29607 1000 Order Now
MOUSER WORLDWIDE 5038 1 Order Now
Farnell Element14 EUROPE 268 1 Order Now
RUTRONIK EUROPE 1800 50 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

6242

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

532

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

450

Min.Order

25

Region

EUROPE Order Now

AVNET

Stock

22762

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

16987

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

119

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

29607

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

5038

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

268

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

1800

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

Buy Direct
Active
EAR99 NEC Tube TO-220 0 125 CHINA 0.192 / 1k
LM317T Available at 11 distributors

Distributor availability ofLM317T

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 22454 1 Order Now
COMPEL EUROPE 14707 1 Order Now
RS COMPONENTS EUROPE 11376 50 Order Now
AVNET AMERICA 198589 0 Order Now
FUTURE WORLDWIDE 13554 1 Order Now
ARROW EUROPE 345468 0 Order Now
Newark Element14 AMERICA 10 0 Order Now
ARROW AMERICA 77065 1000 Order Now
MOUSER WORLDWIDE 31626 1 Order Now
Farnell Element14 EUROPE 27389 1 Order Now
ANGLIA Live EUROPE 120900 50 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

22454

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

14707

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11376

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

198589

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

13554

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

345468

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

10

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

77065

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

31626

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

27389

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

120900

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

Buy Direct
Active
EAR99 NEC Tube TO-220 0 125 CHINA 0.144 / 1k
LM317P Available at 10 distributors

Distributor availability ofLM317P

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2662 1 Order Now
COMPEL EUROPE 2577 1 Order Now
RS COMPONENTS EUROPE 2180 10 Order Now
AVNET AMERICA 3943 0 Order Now
FUTURE WORLDWIDE 1505 50 Order Now
ARROW EUROPE 1013 0 Order Now
Newark Element14 AMERICA 11 0 Order Now
MOUSER WORLDWIDE 1938 1 Order Now
Farnell Element14 EUROPE 435 1 Order Now
ANGLIA Live EUROPE 1965 1 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

2662

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2577

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2180

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

3943

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1505

Min.Order

50

Region

WORLDWIDE Order Now

ARROW

Stock

1013

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

11

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1938

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

435

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1965

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

Buy Direct
Active
EAR99 NEC Tube TO-220FP 0 125 CHINA 0.306 / 1k

LM317D2T-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.32 / 1k

Distributor availability ofLM317D2T-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 11426 1 Order Now
COMPEL EUROPE 24319 1 Order Now
RS COMPONENTS EUROPE 8075 5 Order Now
AVNET AMERICA 64000 0 Order Now
FUTURE WORLDWIDE 631 1 Order Now
ARROW EUROPE 44003 0 Order Now
ARROW AMERICA 1000 1000 Order Now
MOUSER WORLDWIDE 4889 1 Order Now
Farnell Element14 EUROPE 12347 1 Order Now
ANGLIA Live EUROPE 5000 1000 Order Now
RUTRONIK EUROPE 1000 1000 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

11426

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

24319

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

8075

Min.Order

5

Region

EUROPE Order Now

AVNET

Stock

64000

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

631

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

44003

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

1000

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

4889

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

12347

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

5000

Min.Order

1000

Region

EUROPE Order Now

RUTRONIK

Stock

1000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

0.32 / 1k

Country of Origin

CHINA

LM317BT

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.23 / 1k

Distributor availability ofLM317BT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 9916 1 Order Now
RS COMPONENTS EUROPE 1370 50 Order Now
ARROW EUROPE 5058 0 Order Now
MOUSER WORLDWIDE 2039 1 Order Now
Farnell Element14 EUROPE 817 1 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

9916

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1370

Min.Order

50

Region

EUROPE Order Now

ARROW

Stock

5058

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

2039

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

817

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

-40

(max)

125

Budgetary Price (US$)* / Qty

0.23 / 1k

Country of Origin

CHINA

LM317T-DG

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.192 / 1k

Distributor availability ofLM317T-DG

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 6242 1 Order Now
COMPEL EUROPE 532 1 Order Now
RS COMPONENTS EUROPE 450 25 Order Now
AVNET AMERICA 22762 0 Order Now
ARROW EUROPE 16987 0 Order Now
Newark Element14 AMERICA 119 0 Order Now
ARROW AMERICA 29607 1000 Order Now
MOUSER WORLDWIDE 5038 1 Order Now
Farnell Element14 EUROPE 268 1 Order Now
RUTRONIK EUROPE 1800 50 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

6242

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

532

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

450

Min.Order

25

Region

EUROPE Order Now

AVNET

Stock

22762

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

16987

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

119

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

29607

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

5038

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

268

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

1800

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

0.192 / 1k

Country of Origin

CHINA

LM317T

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.144 / 1k

Distributor availability ofLM317T

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 22454 1 Order Now
COMPEL EUROPE 14707 1 Order Now
RS COMPONENTS EUROPE 11376 50 Order Now
AVNET AMERICA 198589 0 Order Now
FUTURE WORLDWIDE 13554 1 Order Now
ARROW EUROPE 345468 0 Order Now
Newark Element14 AMERICA 10 0 Order Now
ARROW AMERICA 77065 1000 Order Now
MOUSER WORLDWIDE 31626 1 Order Now
Farnell Element14 EUROPE 27389 1 Order Now
ANGLIA Live EUROPE 120900 50 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

22454

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

14707

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

11376

Min.Order

50

Region

EUROPE Order Now

AVNET

Stock

198589

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

13554

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

345468

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

10

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

77065

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

31626

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

27389

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

120900

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

0.144 / 1k

Country of Origin

CHINA

LM317P

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.306 / 1k

Distributor availability ofLM317P

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2662 1 Order Now
COMPEL EUROPE 2577 1 Order Now
RS COMPONENTS EUROPE 2180 10 Order Now
AVNET AMERICA 3943 0 Order Now
FUTURE WORLDWIDE 1505 50 Order Now
ARROW EUROPE 1013 0 Order Now
Newark Element14 AMERICA 11 0 Order Now
MOUSER WORLDWIDE 1938 1 Order Now
Farnell Element14 EUROPE 435 1 Order Now
ANGLIA Live EUROPE 1965 1 Order Now

Distributor reported inventory date: 2020-10-22

Distributor Name

DIGIKEY

Stock

2662

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2577

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2180

Min.Order

10

Region

EUROPE Order Now

AVNET

Stock

3943

Min.Order

0

Region

AMERICA Order Now

FUTURE

Stock

1505

Min.Order

50

Region

WORLDWIDE Order Now

ARROW

Stock

1013

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

11

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

1938

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

435

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1965

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-10-22

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220FP

Operating Temperature (°C)

(min)

0

(max)

125

Budgetary Price (US$)* / Qty

0.306 / 1k

Country of Origin

CHINA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors