10 A switching regulator

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  • The L4970A is a stepdown monolithic power switching regulator delivering 10A 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 L4970A 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 components.

    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
    • 10A OUTPUT CURRENT
    • 0 TO 90% DUTY CYCLE RANGE
    • 5.1V TO 40V OUTPUT VOLTAGE RANGE
    • INTERNAL CURRENT LIMITING
    • SOFT START
    • INTERNAL FEED-FORWARD LINE REGULATION

Circuit Diagram

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Part Number
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Quantity
ECCN (US)
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L4970A MW 15L Tube
Active
6.941 10000 EAR99 MOROCCO Check Availability

Distributor availability ofL4970A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 239 1 Order Now
RS COMPONENTS EUROPE 178 1 Order Now
FUTURE WORLDWIDE 230 1 Order Now
ARROW EUROPE 11 0 Order Now
Newark Element14 AMERICA 5 0 Order Now
ARROW AMERICA 500 500 Order Now
MOUSER WORLDWIDE 269 1 Order Now
Farnell Element14 EUROPE 621 1 Order Now
ANGLIA Live EUROPE 4054 1 Order Now
RUTRONIK EUROPE 675 25 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

239

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

178

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

230

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

11

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

5

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

500

Min.Order

500

Region

AMERICA Order Now

MOUSER

Stock

269

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

621

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

4054

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

675

Min.Order

25

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Buy now

L4970A

Package

MW 15L

Packing Type

Tube

Unit Price (US$)

6.941*

Distributor availability ofL4970A

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 239 1 Order Now
RS COMPONENTS EUROPE 178 1 Order Now
FUTURE WORLDWIDE 230 1 Order Now
ARROW EUROPE 11 0 Order Now
Newark Element14 AMERICA 5 0 Order Now
ARROW AMERICA 500 500 Order Now
MOUSER WORLDWIDE 269 1 Order Now
Farnell Element14 EUROPE 621 1 Order Now
ANGLIA Live EUROPE 4054 1 Order Now
RUTRONIK EUROPE 675 25 Order Now

Distributor reported inventory date: 2019-09-13

Distributor Name

DIGIKEY

Stock

239

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

178

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

230

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

11

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

5

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

500

Min.Order

500

Region

AMERICA Order Now

MOUSER

Stock

269

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

621

Min.Order

1

Region

EUROPE Order Now

ANGLIA Live

Stock

4054

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

675

Min.Order

25

Region

EUROPE Order Now

Distributor reported inventory date: 2019-09-13

Marketing Status

Active

Unit Price (US$)

6.941

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

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Technical Documentation

    • Description Version Size Action
      DS0066
      10A switching regulator
      1.2
      6.58 MB
      PDF
      DS0066

      10A switching regulator

    • Description Version Size Action
      AN245
      Designing multiple output power supplies with the L296 and L4960
      1.2
      848.14 KB
      PDF
      AN557
      Easy application design with the L4970A, monolithic DC-DC converters family
      1.1
      1.51 MB
      PDF
      AN487
      Introduction to a 10A monolithic switching regulator in multipower-BCD technology
      1.1
      370.6 KB
      PDF
      AN245

      Designing multiple output power supplies with the L296 and L4960

      AN557

      Easy application design with the L4970A, monolithic DC-DC converters family

      AN487

      Introduction to a 10A monolithic switching regulator in multipower-BCD technology

    • 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**
L4970A
Active
MW 15L Industrial Ecopack1

L4970A

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.