L4940

Active

1.5 A very low drop voltage regulator IC

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Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
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Sales Briefcase

Product overview

Description

The L4940 series of three-terminal positive regulators is available in TO-220 and D²PAK packages and with several fixed output voltages, making it useful in a wide range of industrial and consumer applications. Thanks to their very low input/output voltage drop, these devices are particularly suitable for battery-powered equipment, reducing consumption and prolonging battery-life. Each type employs internal current limiting, anti-saturation circuit, thermal shutdown and safe area protection.
  • All features

    • Precise 5, 8.5, 12 V outputs
    • Low dropout voltage (450 mV typ. at 1 A)
    • Very low quiescent current
    • Thermal shutdown
    • Short-circuit protection
    • Reverse polarity protection

Recommended for you

Related Applications

Industrial

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L4940

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Symbols

Symbols

Footprints

Footprints

3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4940D2T12-TR
Active
D2PAK Industrial Ecopack2
L4940D2T5-TR
Active
D2PAK Industrial Ecopack2
L4940V5
Active
TO-220 Industrial Ecopack2
L4940V85
Active
TO-220 Industrial Ecopack2

L4940D2T12-TR

Package:

D2PAK

Material Declaration**:

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940D2T5-TR

Package:

D2PAK

Material Declaration**:

Marketing Status

Active

Package

D2PAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940V5

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4940V85

Package:

TO-220

Material Declaration**:

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
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Output Voltage (V) (nom)
Budgetary Price (US$)*/Qty
More info
min
max
L4940V5 Available at 4 distributors

Distributor availability ofL4940V5

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7001 1 Order Now
RS COMPONENTS EUROPE 530 1 Order Now
Farnell Element14 EUROPE 70 1 Order Now
ANGLIA Live EUROPE 7 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

7001

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

530

Min.Order

1

Region

EUROPE Order Now

Farnell Element14

Stock

70

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

Buy Direct
Active
EAR99 NEC Tube TO-220 -40 150 5 0.6647 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.6647

Country of Origin:

CHINA

L4940D2T12-TR Available at 5 distributors

Distributor availability ofL4940D2T12-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 477 1 Order Now
RS COMPONENTS EUROPE 680 1 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
Newark Element14 AMERICA 19 0 Order Now
Farnell Element14 EUROPE 591 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

477

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

680

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Order Now

Newark Element14

Stock

19

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

591

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

Buy Direct
Active
EAR99 NEC Tape And Reel D2PAK -40 150 12 0.5715 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.5715

Country of Origin:

CHINA

L4940D2T5-TR Available at 4 distributors

Distributor availability ofL4940D2T5-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 907 1 Order Now
RS COMPONENTS EUROPE 2385 5 Order Now
FUTURE WORLDWIDE 765 1 Order Now
Farnell Element14 EUROPE 944 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

907

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2385

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

765

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

944

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

Buy Direct
Active
EAR99 NEC Tape And Reel D2PAK -40 150 5 0.5715 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.5715

Country of Origin:

CHINA

L4940V85 Available at 2 distributors

Distributor availability ofL4940V85

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1858 1 Order Now
RS COMPONENTS EUROPE 1010 5 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

1858

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1010

Min.Order

5

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

Buy Direct
Active
EAR99 NEC Tube TO-220 -40 150 8.5 0.6647 / 1k
MORE INFO

Output Tolerance (typ):

2

Output Current (A) (nom):

1.5

Unit Price (US$):

0.6647

Country of Origin:

CHINA

L4940V5

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6647 / 1k

Distributor availability ofL4940V5

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 7001 1 Order Now
RS COMPONENTS EUROPE 530 1 Order Now
Farnell Element14 EUROPE 70 1 Order Now
ANGLIA Live EUROPE 7 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

7001

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

530

Min.Order

1

Region

EUROPE Order Now

Farnell Element14

Stock

70

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

7

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.6647 / 1k

Country of Origin

CHINA

L4940D2T12-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5715 / 1k

Distributor availability ofL4940D2T12-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 477 1 Order Now
RS COMPONENTS EUROPE 680 1 Order Now
FUTURE WORLDWIDE 1000 1000 Order Now
Newark Element14 AMERICA 19 0 Order Now
Farnell Element14 EUROPE 591 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

477

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

680

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Order Now

Newark Element14

Stock

19

Min.Order

0

Region

AMERICA Order Now

Farnell Element14

Stock

591

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

12

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.5715 / 1k

Country of Origin

CHINA

L4940D2T5-TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.5715 / 1k

Distributor availability ofL4940D2T5-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 907 1 Order Now
RS COMPONENTS EUROPE 2385 5 Order Now
FUTURE WORLDWIDE 765 1 Order Now
Farnell Element14 EUROPE 944 1 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

907

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2385

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

765

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

944

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

D2PAK

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.5715 / 1k

Country of Origin

CHINA

L4940V85

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.6647 / 1k

Distributor availability ofL4940V85

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1858 1 Order Now
RS COMPONENTS EUROPE 1010 5 Order Now

Distributor reported inventory date: 2021-07-26

Distributor Name

DIGIKEY

Stock

1858

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1010

Min.Order

5

Region

EUROPE Order Now

Distributor reported inventory date: 2021-07-26

ECCN (EU)

NEC

Packing Type

Tube

Package

TO-220

Operating Temperature (°C)

(min)

-40

(max)

150

Output Voltage (V) (nom)

8.5

Output Tolerance (typ)

2

Output Current (A) (nom)

1.5

Budgetary Price (US$)* / Qty

0.6647 / 1k

Country of Origin

CHINA

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