L4940

Active

1.5 A very low drop voltage regulator IC

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Overview
Online design
Sample & Buy
Solutions
Documentation
CAD Resources
Tools & Software
Quality & Reliability
Partner products
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

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 5 distributors

Distributor availability ofL4940V5

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2367 1 Buy from Distributor
RS COMPONENTS EUROPE 157 1 Buy from Distributor
MOUSER WORLDWIDE 77 1 Buy from Distributor
Farnell Element14 EUROPE 1693 1 Buy from Distributor
ANGLIA Live EUROPE 7 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

2367

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

157

Min.Order

1

MOUSER

Stock

77

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1693

Min.Order

1

ANGLIA Live

Stock

7

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 6 distributors

Distributor availability ofL4940D2T12-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 849 1 Buy from Distributor
RS COMPONENTS EUROPE 680 1 Buy from Distributor
FUTURE WORLDWIDE 1000 1000 Buy from Distributor
Newark Element14 AMERICA 19 0 Buy from Distributor
MOUSER WORLDWIDE 727 1 Buy from Distributor
Farnell Element14 EUROPE 591 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

849

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

680

Min.Order

1

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

19

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

727

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

591

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 1761 1 Buy from Distributor
RS COMPONENTS EUROPE 2250 5 Buy from Distributor
MOUSER WORLDWIDE 447 1 Buy from Distributor
Farnell Element14 EUROPE 204 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

1761

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

2250

Min.Order

5

MOUSER

Stock

447

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

204

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 3 distributors

Distributor availability ofL4940V85

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1808 1 Buy from Distributor
RS COMPONENTS EUROPE 1000 5 Buy from Distributor
MOUSER WORLDWIDE 1555 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

1808

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

1000

Min.Order

5

MOUSER

Stock

1555

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-27

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 2367 1 Buy from Distributor
RS COMPONENTS EUROPE 157 1 Buy from Distributor
MOUSER WORLDWIDE 77 1 Buy from Distributor
Farnell Element14 EUROPE 1693 1 Buy from Distributor
ANGLIA Live EUROPE 7 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

2367

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

157

Min.Order

1

MOUSER

Stock

77

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

1693

Min.Order

1

ANGLIA Live

Stock

7

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 849 1 Buy from Distributor
RS COMPONENTS EUROPE 680 1 Buy from Distributor
FUTURE WORLDWIDE 1000 1000 Buy from Distributor
Newark Element14 AMERICA 19 0 Buy from Distributor
MOUSER WORLDWIDE 727 1 Buy from Distributor
Farnell Element14 EUROPE 591 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

849

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

680

Min.Order

1

FUTURE

Stock

1000

Min.Order

1000

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

19

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

727

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

591

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 1761 1 Buy from Distributor
RS COMPONENTS EUROPE 2250 5 Buy from Distributor
MOUSER WORLDWIDE 447 1 Buy from Distributor
Farnell Element14 EUROPE 204 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

1761

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

2250

Min.Order

5

MOUSER

Stock

447

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Farnell Element14

Stock

204

Min.Order

1

Distributor reported inventory date: 2021-10-27

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 1808 1 Buy from Distributor
RS COMPONENTS EUROPE 1000 5 Buy from Distributor
MOUSER WORLDWIDE 1555 1 Buy from Distributor

Distributor reported inventory date: 2021-10-27

Distributor Name

DIGIKEY

Stock

1808

Min.Order

1

Region

WORLDWIDE Buy from Distributor

RS COMPONENTS

Stock

1000

Min.Order

5

MOUSER

Stock

1555

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-27

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