L4971

Active

1.5A Switching Regulator

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  • The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed.

    A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed).
    A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications.
    Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
    The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.

    Key Features

    • PROTECTION AGAINST FEEDBACK DISCONNECTION
    • INHIBIT FOR ZERO CURRENT CONSUMPTION
    • SOFT START FUNCTION
    • THERMAL SHUTDOWN
    • ZERO LOAD CURRENT OPERATION
    • VOLTAGE FEEDFORWARD
    • UP TO 1.5A STEP DOWN CONVERTER
    • PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
    • OPERATING INPUT VOLTAGE FROM 8V TO 55V
    • SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
    • INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
    • OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Approximate Price (US$)* / Qty
Order from ST
Order from Distributors
L4971 DIP-8 Tube
Active
EAR99 MALAYSIA 1.185 / 1k Get sample Check Availability

Distributor availability ofL4971

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1938 1 Order Now
COMPEL EUROPE 12 1 Order Now
RS COMPONENTS EUROPE 2425 1 Order Now
AVNET AMERICA 852 0 Order Now
ARROW EUROPE 23750 0 Order Now
MOUSER WORLDWIDE 3640 1 Order Now
ANGLIA Live EUROPE 35900 50 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

1938

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

12

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2425

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

852

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

23750

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3640

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

35900

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

L4971D SO-16W Tube
Active
EAR99 MALAYSIA 3.15 / 1k Buy now Check Availability

Distributor availability ofL4971D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 165 1 Order Now
COMPEL EUROPE 31 1 Order Now
RS COMPONENTS EUROPE 317 1 Order Now
FUTURE WORLDWIDE 2887 1 Order Now
ARROW EUROPE 1969 0 Order Now
MOUSER WORLDWIDE 693 1 Order Now
Farnell Element14 EUROPE 1232 1 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

165

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

31

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

317

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2887

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1969

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

693

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1232

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

L4971D013TR SO-16W Tape And Reel
Active
EAR99 MALAYSIA 1.354 / 1k Get sample Check Availability

Distributor availability ofL4971D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 60 1 Order Now
COMPEL EUROPE 2335 1 Order Now
AVNET AMERICA 31000 0 Order Now
ARROW AMERICA 10000 1000 Order Now
Farnell Element14 EUROPE 159 1 Order Now
RUTRONIK EUROPE 2000 1000 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

60

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2335

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

31000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

10000

Min.Order

1000

Region

AMERICA Order Now

Farnell Element14

Stock

159

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

2000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

L4971

Package

DIP-8

Packing Type

Tube

Approximate Price (US$)* / Qty

1.185 / 1k

Distributor availability ofL4971

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1938 1 Order Now
COMPEL EUROPE 12 1 Order Now
RS COMPONENTS EUROPE 2425 1 Order Now
AVNET AMERICA 852 0 Order Now
ARROW EUROPE 23750 0 Order Now
MOUSER WORLDWIDE 3640 1 Order Now
ANGLIA Live EUROPE 35900 50 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

1938

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

12

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

2425

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

852

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

23750

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

3640

Min.Order

1

Region

WORLDWIDE Order Now

ANGLIA Live

Stock

35900

Min.Order

50

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.185 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4971D

Package

SO-16W

Packing Type

Tube

Approximate Price (US$)* / Qty

3.15 / 1k

Distributor availability ofL4971D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 165 1 Order Now
COMPEL EUROPE 31 1 Order Now
RS COMPONENTS EUROPE 317 1 Order Now
FUTURE WORLDWIDE 2887 1 Order Now
ARROW EUROPE 1969 0 Order Now
MOUSER WORLDWIDE 693 1 Order Now
Farnell Element14 EUROPE 1232 1 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

165

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

31

Min.Order

1

Region

EUROPE Order Now

RS COMPONENTS

Stock

317

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2887

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

1969

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

693

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1232

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

3.15 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4971D013TR

Package

SO-16W

Packing Type

Tape And Reel

Approximate Price (US$)* / Qty

1.354 / 1k

Distributor availability ofL4971D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 60 1 Order Now
COMPEL EUROPE 2335 1 Order Now
AVNET AMERICA 31000 0 Order Now
ARROW AMERICA 10000 1000 Order Now
Farnell Element14 EUROPE 159 1 Order Now
RUTRONIK EUROPE 2000 1000 Order Now

Distributor reported inventory date: 2020-04-02

Distributor Name

DIGIKEY

Stock

60

Min.Order

1

Region

WORLDWIDE Order Now

COMPEL

Stock

2335

Min.Order

1

Region

EUROPE Order Now

AVNET

Stock

31000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

10000

Min.Order

1000

Region

AMERICA Order Now

Farnell Element14

Stock

159

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

2000

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-04-02

Marketing Status

Active

Budgetary Price (US$)* / Qty

1.354 / 1k

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) 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

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4971
Active
DIP-8 Industrial Ecopack2 (**)
L4971D
Active
SO-16W Industrial Ecopack1
L4971D013TR
Active
SO-16W Industrial Ecopack1

L4971

Package:

DIP-8

Material Declaration**:

PDF XML

Marketing Status

Active

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4971D

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4971D013TR

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16W

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.

eDesignSuite

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V This option is required. And must be greater than or equal to Volt. Min [V]

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A This option is required and must be a number.

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