L4976

Active

1 A step down switching regulator

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Documentation
CAD Resources
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Quality & Reliability
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Product overview

Description

The L4976 is a step down monolithic power switching regulator delivering 1A 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 Rds(ON) of 0.25W) 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 40V 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, protection against feedback loop disconnection and thermal shutdown. The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.
  • All features

    • Protection against feedback disconnection
    • and hiccup mode)
    • Thermal shutdown
    • Zero load current operation
    • Voltage feedforward
    • Up to 1A step down converter
    • Precise 5.1V reference voltage
    • Operating input voltage from 8v to 55v
    • Switching frequency adjustable up to 300kHz
    • Internal current limiting (pulse-bypulse
    • Output voltage adjustable from 0.5V to 50V

Circuit Diagram

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L4976

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Symbols

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Footprints

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3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4976
NRND
DIP-8 Industrial Ecopack2
L4976D
Active
SO-16W Industrial Ecopack1
L4976D013TR
Active
SO-16W Industrial Ecopack1

L4976

Package:

DIP-8

Material Declaration**:

Marketing Status

NRND

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

L4976D

Package:

SO-16W

Material Declaration**:

Marketing Status

Active

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4976D013TR

Package:

SO-16W

Material Declaration**:

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.

Converter

Input

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

Output Power

V This option is required and must be a number.
A This option is required and must be a number.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L4976 No availability of distributors reported, please contact our sales office
NRND
EAR99 NEC Tube DIP-8 -40 150 CHINA 1.729 / 1k
L4976D Available at 3 distributors

Distributor availability ofL4976D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2 1 Buy from Distributor
Newark Element14 AMERICA 266 0 Buy from Distributor
MOUSER WORLDWIDE 336 1 Buy from Distributor

Distributor reported inventory date: 2021-10-18

Distributor Name

DIGIKEY

Stock

2

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

266

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

336

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-18

Buy Direct
Active
EAR99 NEC Tube SO-16W -40 150 MALAYSIA 1.9668 / 1k
L4976D013TR Available at 1 distributors

Distributor availability ofL4976D013TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 800 1 Buy from Distributor

Distributor reported inventory date: 2021-10-18

Distributor Name

MOUSER

Stock

800

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-18

Free Sample Buy Direct
Active
EAR99 NEC Tape And Reel SO-16W -40 150 MALAYSIA 1.9668 / 1k

L4976

Marketing Status

NRND

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.729 / 1k

ECCN (EU)

NEC

Packing Type

Tube

Package

DIP-8

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.729 / 1k

Country of Origin

CHINA

L4976D

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.9668 / 1k

Distributor availability ofL4976D

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2 1 Buy from Distributor
Newark Element14 AMERICA 266 0 Buy from Distributor
MOUSER WORLDWIDE 336 1 Buy from Distributor

Distributor reported inventory date: 2021-10-18

Distributor Name

DIGIKEY

Stock

2

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Newark Element14

Stock

266

Min.Order

0

Region

AMERICA Buy from Distributor

MOUSER

Stock

336

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-18

ECCN (EU)

NEC

Packing Type

Tube

Package

SO-16W

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.9668 / 1k

Country of Origin

MALAYSIA

L4976D013TR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.9668 / 1k

Distributor availability ofL4976D013TR

Distributor Name
Region Stock Min. Order Third party link
MOUSER WORLDWIDE 800 1 Buy from Distributor

Distributor reported inventory date: 2021-10-18

Distributor Name

MOUSER

Stock

800

Min.Order

1

Region

WORLDWIDE Buy from Distributor

Distributor reported inventory date: 2021-10-18

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

SO-16W

Operating Temperature (°C)

(min)

-40

(max)

150

Budgetary Price (US$)* / Qty

1.9668 / 1k

Country of Origin

MALAYSIA

(*) 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