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  • The L4941 is a three terminal 5V positive regulators available in TO-220 and DPAK packages, making it useful in a wide range of industrial and consumer applications. Thanks to its very low input/output voltage drop, these devices are particularly suitable for battery powered equipments, reducing consumption and prolonging battery life. It employs internal current limiting, antisaturation circuit, thermal shut-down and safe area protection.

    Key Features

    • Low dropout voltage (450mV typ. at 1A)
    • Thermal shutdown
    • Very low quiescent current
    • Reverse polarity protection
    • Short circuit protection

Circuit Diagram

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Technical Documentation

    • Description Version Size Action
      DS0421
      Very low drop 1A regulator
      5.3
      956.16 KB
      PDF
      DS0421

      Very low drop 1A regulator

    • Description Version Size Action
      AN290
      Very low drop regulators enhance supply performance
      1.3
      529.03 KB
      PDF
      AN290

      Very low drop regulators enhance supply performance

Publications and Collaterals

    • Description Version Size Action
      Linear and Switching Voltage Regulators Selection Guide 3.0
      370.88 KB
      PDF

      Linear and Switching Voltage Regulators Selection Guide

    • Description Version Size Action
      Low-dropout (LDO) linear voltage regulators Quick Reference Guide 2.1
      1.78 MB
      PDF
      Power management for handheld and portable 2.0
      1.09 MB
      PDF

      Low-dropout (LDO) linear voltage regulators Quick Reference Guide

      Power management for handheld and portable

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4941BDT-TR
Active
DPAK Industrial Ecopack2
L4941BV
Active
TO-220 Industrial Ecopack1

L4941BDT-TR

Package:

DPAK

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DPAK

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4941BV

Package:

TO-220

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TO-220

Grade

Industrial

RoHS Compliance Grade

Ecopack1

(**) 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
Package
Packing Type
Output Voltage (V) (nom)
Output Tolerance (typ)
Output Current (A) (nom)
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
L4941BV Available at 8 distributors

Distributor availability ofL4941BV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 205 1 Order Now
RS COMPONENTS EUROPE 1308 1 Order Now
AVNET AMERICA 1011 0 Order Now
ARROW EUROPE 22335 0 Order Now
ARROW AMERICA 4230 1000 Order Now
MOUSER WORLDWIDE 1992 1 Order Now
Farnell Element14 EUROPE 227 1 Order Now
ANGLIA Live EUROPE 1540 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

205

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1308

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

1011

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

22335

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

4230

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1992

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

227

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1540

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Buy now TO-220 Tube 5 4 1
Active
EAR99 CHINA 0.406 / 1k
L4941BDT-TR Available at 8 distributors

Distributor availability ofL4941BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4278 1 Order Now
COMPEL EUROPE 1591 1 Order Now
RS COMPONENTS EUROPE 10650 5 Order Now
FUTURE WORLDWIDE 1487 1 Order Now
ARROW EUROPE 17500 0 Order Now
ARROW AMERICA 32500 2500 Order Now
MOUSER WORLDWIDE 8177 1 Order Now
Farnell Element14 EUROPE 4130 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

4278

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1591

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

10650

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

1487

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

32500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

8177

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4130

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Buy now DPAK Tape And Reel 5 4 1
Active
EAR99 CHINA 0.568 / 1k

L4941BV

Package

TO-220

Packing Type

Tube

Budgetary Price (US$)*/Qty

0.406 / 1k

Distributor availability ofL4941BV

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 205 1 Order Now
RS COMPONENTS EUROPE 1308 1 Order Now
AVNET AMERICA 1011 0 Order Now
ARROW EUROPE 22335 0 Order Now
ARROW AMERICA 4230 1000 Order Now
MOUSER WORLDWIDE 1992 1 Order Now
Farnell Element14 EUROPE 227 1 Order Now
ANGLIA Live EUROPE 1540 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

205

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

1308

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

1011

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

22335

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

4230

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

1992

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

227

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1540

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Output Voltage (V) (nom)

5

Output Tolerance (typ)

4

Output Current (A) (nom)

1

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.406 / 1k

ECCN (US)

EAR99

Country of Origin

CHINA

L4941BDT-TR

Package

DPAK

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

0.568 / 1k

Distributor availability ofL4941BDT-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 4278 1 Order Now
COMPEL EUROPE 1591 1 Order Now
RS COMPONENTS EUROPE 10650 5 Order Now
FUTURE WORLDWIDE 1487 1 Order Now
ARROW EUROPE 17500 0 Order Now
ARROW AMERICA 32500 2500 Order Now
MOUSER WORLDWIDE 8177 1 Order Now
Farnell Element14 EUROPE 4130 1 Order Now

Distributor reported inventory date: 2020-06-29

Distributor Name

DIGIKEY

Stock

4278

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

1591

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

10650

Min.Order

5

Region

EUROPE Order Now

FUTURE

Stock

1487

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

17500

Min.Order

0

Region

EUROPE Order Now

ARROW

Stock

32500

Min.Order

2500

Region

AMERICA Order Now

MOUSER

Stock

8177

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

4130

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-06-29

Output Voltage (V) (nom)

5

Output Tolerance (typ)

4

Output Current (A) (nom)

1

Marketing Status

Active

Budgetary Price (US$)* / Qty

0.568 / 1k

ECCN (US)

EAR99

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