LT1424-5

PRODUCTION

LT1424-5

Isolated Flyback Switching Regulator with 5V Output

PRODUCTION

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Part Models 6

1ku List Price Starting From $4.11

Features

No Transformer “Third Winding” or Optoisolator Required
Designed for Use with 1:1 Ratio Transformers
Fixed, Application Specific 5V Output Voltage
Regulation Maintained Well into Discontinuous Mode (Light Load)
Load Compensation Provides Excellent Load Regulation
Available in 8-Pin PDIP and SO Packages
Operating Frequency: 285kHz

Additional Details

The LT1424-5 is a monolithic high power switching regulator specifically designed for the isolated flyback topology. No “third winding” or optoisolator is required; the integrated circuit senses the isolated output voltage directly from the primary side flyback waveform. A high current, high efficiency switch is included on the die along with all oscillator, control and protection circuitry.

The LT1424-5 operates with input supply voltages from 3V to 20V and draws only 7mA quiescent current. It can deliver up to 400mA at 5V with no external power devices. By utilizing current mode switching techniques, it provides excellent AC and DC line regulation.

The LT1424-5 has a number of features not found on other switching regulator ICs. Its unique control circuitry can maintain regulation well into discontinuous mode. Load compensation circuitry allows for improved load regulation. An externally activated shutdown mode reduces total supply current to 20µA typical for standby operation.

Applications

Isolated Communication Supplies
Industrial Automation
Instrumentation Systems

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 6

1ku List Price Starting From $4.11

Technical Documents 2

LT1424-5: Isolated Flyback Switching Regulator with 5V Output Data Sheet 08/28/2007

R387 Reliability Data 03/26/2018

Design Resources 6

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT1424CN8-5#PBF	8-Lead PDIP (Narrow 0.3 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1424CS8-5#PBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1424CS8-5#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1424IN8-5#PBF	8-Lead PDIP (Narrow 0.3 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1424IS8-5#PBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LT1424IS8-5#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LT1424CN8-5#PBF
Pin/Package Drawing
8-Lead PDIP (Narrow 0.3 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1424CS8-5#PBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1424CS8-5#TRPBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1424IN8-5#PBF
Pin/Package Drawing
8-Lead PDIP (Narrow 0.3 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1424IS8-5#PBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LT1424IS8-5#TRPBF
Pin/Package Drawing
8-Lead SOIC (Narrow 0.15 Inch)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT1424CN8-5#PBF

PRODUCTION

LT1424IN8-5#PBF

PRODUCTION

pdf

PCN22_0241_Form

xls

Material_Report

pdf

Qualification Results Summary

Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LT1424CN8-5#PBF

PRODUCTION

LT1424IN8-5#PBF

PRODUCTION

pdf

PCN22_0172_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Oct 12, 2022

- 22_0254

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1424CS8-5#PBF

PRODUCTION

LT1424CS8-5#TRPBF

PRODUCTION

LT1424IS8-5#PBF

PRODUCTION

LT1424IS8-5#TRPBF

PRODUCTION

pdf

PCN22_0254_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Jun 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1424CS8-5#PBF

PRODUCTION

LT1424CS8-5#TRPBF

PRODUCTION

LT1424IS8-5#PBF

PRODUCTION

LT1424IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0241

Epoxy Change from Henkel 8290 to 8290A for PDIP Package

LT1424CN8-5#PBF

PRODUCTION

LT1424IN8-5#PBF

PRODUCTION

pdf

PCN22_0241_Form

xls

Material_Report

pdf

Qualification Results Summary

Aug 6, 2022

- 22_0172

Laser Top Mark Conversion for PDIP Packages Assembled in ADPG [PNG]

LT1424CN8-5#PBF

PRODUCTION

LT1424IN8-5#PBF

PRODUCTION

pdf

PCN22_0172_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Oct 12, 2022

- 22_0254

Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 1 of 2)

LT1424CS8-5#PBF

PRODUCTION

LT1424CS8-5#TRPBF

PRODUCTION

LT1424IS8-5#PBF

PRODUCTION

LT1424IS8-5#TRPBF

PRODUCTION

pdf

PCN22_0254_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Jun 11, 2021

- 21_0060

Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM

LT1424CS8-5#PBF

PRODUCTION

LT1424CS8-5#TRPBF

PRODUCTION

LT1424IS8-5#PBF

PRODUCTION

LT1424IS8-5#TRPBF

PRODUCTION

pdf

PCN21_0060_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

LTspice 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.