LT3574

PRODUCTION

Isolated Flyback Converter Without an Opto-Coupler

Data Sheet Product Selection Table

Part Models: 4
1ku List Price: Starting From $3.32

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Part Details

3V to 40V Input Voltage Range
0.65A, 60V Integrated NPN Power Switch
Boundary Mode Operation
No Transformer Third Winding or Opto-Isolator Required for Regulation
Improved Primary-Side Winding Feedback Load Regulation
V_OUT Set with Two External Resistors
BIAS Pin for Internal Bias Supply and Power NPN Driver
Programmable Soft-Start
Programmable Power Switch Current Limit
16-Lead MSOP Package

Part Models: 4
1ku List Price: Starting From $3.32

Documentation

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
LT3574EMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3574EMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3574IMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT3574IMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT3574EMS#PBF	PRODUCTION
LT3574EMS#TRPBF	PRODUCTION
LT3574IMS#PBF	PRODUCTION
LT3574IMS#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT3574EMS#PBF	PRODUCTION
LT3574EMS#TRPBF	PRODUCTION
LT3574IMS#PBF	PRODUCTION
LT3574IMS#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Isolated µModule Converters 2
LTM8048	RECOMMENDED FOR NEW DESIGNS	3.1V_IN to 32V_IN Isolated μModule (Power Module) DC/DC Converter with LDO Post Regulator
LTM8047	RECOMMENDED FOR NEW DESIGNS	3.1V_IN to 32V_IN Isolated μModule (Power Module) DC/DC Converter

Parts	Product Life Cycle	Description
LT8301	RECOMMENDED FOR NEW DESIGNS	42V_IN Micropower No-Opto Isolated Flyback Converter with 65V/1.2A Switch

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT3574

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.

Evaluation Kits

LT3574EMS Isolated Demo Board | 10V to 30VIN; VOUT = 5V @ 0.35A to 0.5A

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Product Details

Demonstration circuit 1636A is an isolated flyback converter featuring the LT3574. This demo circuit is designed for a 5.0V output from a 10V to 30V input. The maximum output current is 0.5A when the input voltage is higher than 20V. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary-side flyback waveform. The LT3574 operates with input supply voltages from 3V to 40V, and can deliver an output power up to 3W with no external power switch. The LT3574 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation.

Resources

DC1636A - Schematic
50.00K

DC1636A - Demo Manual
408.00K

DC1636A - Design Files
2.00M

Latest Discussions

6 Years Ago

LT3574

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Technical Articles 1

Solutions Bulletin & Brochure 1

Product Selector Card 1