5 A switching regulator

Download datasheet

Order from our eStore and our distributors

Buy now
Overview
Tools & Software
Resources
Solutions
Quality & Reliability
Sales Briefcase
eDesignSuite
Get Started
Sample & Buy
Partner products
  • The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V.

    Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter component.

    Key Features

    • UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
    • INPUT/OUTPUT SYNC PIN
    • VERY HIGH EFFICIENCY
    • PWM LATCH FOR SINGLE PULSE PER PERIOD
    • THERMAL SHUTDOWN
    • SWITCHING FREQUENCY UP TO 500KHz
    • CONTINUOUS MODE OPERATION
    • RESET AND POWER FAIL FUNCTIONS
    • PRECISE 5.1V ± 2% ON CHIP REFERENCE
    • 5A OUTPUT CURRENT
    • 0 TO 90% DUTY CYCLE RANGE
    • 5.1V TO 40V OUTPUT VOLTAGE RANGE
    • INTERNAL CURRENT LIMITING
    • SOFT START
    • INTERNAL FEED-FORWARD LINE REG.

Circuit Diagram

Download Download

Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
L4975A MW 15L Tube
Active
6.798 10000 EAR99 MOROCCO Check Availability

Distributor availability ofL4975A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 497 1 Order Now
RS COMPONENTS EUROPE 306 1 Order Now
ARROW EUROPE 200 0 Order Now
Newark Element14 AMERICA 9 0 Order Now
ARROW AMERICA 371 500 Order Now
MOUSER WORLDWIDE 570 1 Order Now
Farnell Element14 EUROPE 45 1 Order Now
ANGLIA Live EUROPE 1675 1 Order Now

Distributor reported inventory date: 2019-09-20

Distributor Name

DIGIKEY

Stock

497

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

306

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

200

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

9

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

371

Min.Order

500

Region

AMERICA Order Now

MOUSER

Stock

570

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

45

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1675

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-20

Buy now

L4975A

Package

MW 15L

Packing Type

Tube

Unit Price (US$)

6.798*

Distributor availability ofL4975A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 497 1 Order Now
RS COMPONENTS EUROPE 306 1 Order Now
ARROW EUROPE 200 0 Order Now
Newark Element14 AMERICA 9 0 Order Now
ARROW AMERICA 371 500 Order Now
MOUSER WORLDWIDE 570 1 Order Now
Farnell Element14 EUROPE 45 1 Order Now
ANGLIA Live EUROPE 1675 1 Order Now

Distributor reported inventory date: 2019-09-20

Distributor Name

DIGIKEY

Stock

497

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

306

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

200

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

9

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

371

Min.Order

500

Region

AMERICA Order Now

MOUSER

Stock

570

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

45

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

1675

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-20

Marketing Status

Active

Unit Price (US$)

6.798

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MOROCCO

(*) 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

Featured Products

Recommended for you

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS0069
      5A switching regulator
      1.2
      6.57 MB
      PDF
      DS0069

      5A switching regulator

    • Description Version Size Action
      DN0011
      ST1S03 alternative topology: Using a buck in a negative buck-boost configuration
      1.2
      361.3 KB
      PDF
      DN0011

      ST1S03 alternative topology: Using a buck in a negative buck-boost configuration

Publications and Collaterals

    • Description Version Size Action
      Electric vehicle (EV) ecosystem 1.1
      1.28 MB
      PDF
      Switching Converters (DC-DC) – Quick Reference Guide 1.0
      481.92 KB
      PDF

      Electric vehicle (EV) ecosystem

      Switching Converters (DC-DC) – Quick Reference Guide

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L4975A
Active
MW 15L Industrial Ecopack1

L4975A

Package:

MW 15L

Material Declaration**:

PDF XML

Marketing Status

Active

Package

MW 15L

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.