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  • Key Features

    • PROTECTION AGAINST FEEDBACK DISCONNECTION
    • INHIBIT FOR ZERO CURRENT CONSUMPTION
    • SOFT START FUNCTION
    • THERMAL SHUTDOWN
    • ZERO LOAD CURRENT OPERATION
    • VOLTAGE FEEDFORWARD
    • UP TO 2A 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-BYPULSE AND HICCUP MODE)
    • OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V

Circuit Diagram

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Sample & Buy

Part Number
Package
Packing Type
Marketing Status
Budgetary Price (US$)*
Quantity
ECCN (US)
Country of Origin
Order from Distributors
Order from ST
L4978D013TR SO-16W Tape And Reel
Active
1.389 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofL4978D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2584 1 Order Now
MOUSER WORLDWIDE 137 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

2584

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

137

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-07-19

Get sample
L4978 DIP-8 Tube
Active
1.389 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofL4978

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 858 1 Order Now
FUTURE WORLDWIDE 595 1 Order Now
ARROW EUROPE 850 0 Order Now
MOUSER WORLDWIDE 1046 1 Order Now
Farnell Element14 EUROPE 1281 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

858

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

595

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

850

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1046

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1281

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Get sample
L4978D SO-16W Tube
Active
1.389 10000 EAR99 MALAYSIA Check Availability

Distributor availability ofL4978D

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 951 1 Order Now
ARROW AMERICA 19 1225 Order Now
MOUSER WORLDWIDE 74 1 Order Now
Farnell Element14 EUROPE 1185 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

RS COMPONENTS

Stock

951

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

19

Min.Order

1225

Region

AMERICA Order Now

MOUSER

Stock

74

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1185

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Buy now

L4978D013TR

Package

SO-16W

Packing Type

Tape And Reel

Unit Price (US$)

1.389*

Distributor availability ofL4978D013TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2584 1 Order Now
MOUSER WORLDWIDE 137 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

2584

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

137

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

1.389

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4978

Package

DIP-8

Packing Type

Tube

Unit Price (US$)

1.389*

Distributor availability ofL4978

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 858 1 Order Now
FUTURE WORLDWIDE 595 1 Order Now
ARROW EUROPE 850 0 Order Now
MOUSER WORLDWIDE 1046 1 Order Now
Farnell Element14 EUROPE 1281 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

DIGIKEY

Stock

858

Min.Order

1

Region

WORLDWIDE Order Now

FUTURE

Stock

595

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

850

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

1046

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1281

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

1.389

Quantity

10000

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L4978D

Package

SO-16W

Packing Type

Tube

Unit Price (US$)

1.389*

Distributor availability ofL4978D

Distributor Name
Region Stock Min. Order Third party link
RS COMPONENTS EUROPE 951 1 Order Now
ARROW AMERICA 19 1225 Order Now
MOUSER WORLDWIDE 74 1 Order Now
Farnell Element14 EUROPE 1185 1 Order Now

Distributor reported inventory date: 2019-07-19

Distributor Name

RS COMPONENTS

Stock

951

Min.Order

1

Region

EUROPE Order Now

ARROW

Stock

19

Min.Order

1225

Region

AMERICA Order Now

MOUSER

Stock

74

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

1185

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-07-19

Marketing Status

Active

Unit Price (US$)

1.389

Quantity

10000

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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Technical Documentation

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      9.2
      578.46 KB
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      DS1309

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    • Description Version Size Action
      AN1061
      Designing with L4978, 2A high efficiency DC-DC convertery
      9.2
      793.18 KB
      PDF
      AN1061

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    • 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**
L4978
Active
DIP-8 Industrial Ecopack2 (**)
L4978D
Active
SO-16W Industrial Ecopack1
L4978D013TR
Active
SO-16W Industrial Ecopack1

L4978

Package:

DIP-8

Material Declaration**:

Marketing Status

Active

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2 (**)

L4978D

Package:

SO-16W

Material Declaration**:

PDF XML

Marketing Status

Active

Package

SO-16W

Grade

Industrial

RoHS Compliance Grade

Ecopack1

L4978D013TR

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.