L4976

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1 A step down switching regulator

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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

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Output
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Output Power: 0

EDA Symbols, Footprints and 3D Models

STMicroelectronics - L4976

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4976D
Active
SO-16W Industrial Ecopack1 (*)
L4976D013TR
Active
SO-16W Industrial Ecopack1 (*)

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.

Sample & Buy

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Part Number
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Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
L4976D Available at distributors

Distributor availability of L4976D

Distributor Name
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Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tube SO-16W -40 150 MALAYSIA
L4976D013TR Available at distributors

Distributor availability of L4976D013TR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
Active
EAR99 NEC Tape and Reel SO-16W -40 150 MALAYSIA

L4976D Active

Package:
SO-16W
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L4976D

ECCN (EU):

NEC

Packing Type:

Tube

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

MALAYSIA

Distributor Name

Distributor reported inventory date:

L4976D013TR Active

Package:
SO-16W
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

L4976D013TR

ECCN (EU):

NEC

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-40

Max:

150

Country of Origin:

MALAYSIA

Distributor Name

Distributor reported inventory date:

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(*) 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