LT3511
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LT3511

Monolithic High Voltage Isolated Flyback Converter

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Part Details
Part Models 8
1ku List Price Starting From $3.54
Features
  • 4.5V to 100V Input Voltage Range
  • Internal 240mA, 150V Power Switch
  • Boundary Mode Operation
  • No Transformer Third Winding or Opto-Isolator Required for Regulation
  • Improved Primary-Side Winding Feedback Load Regulation
  • VOUT Set with Two External Resistors
  • BIAS Pin for Internal Bias Supply and Power Switch Driver
  • No External Start-Up Resistor
  • 16-Lead MSOP Package
Additional Details
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The LT3511 is a high voltage monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation as the part senses output voltage directly from the primary-side flyback waveform. The device integrates a 240mA, 150V power switch, high voltage circuitry, and control into a high voltage 16-lead MSOP package with four leads removed.

The LT3511 operates from an input voltage range of 4.5V to 100V and delivers up to 2.5W of isolated output power. Two external resistors and the transformer turns ratio easily set the output voltage. Off-the-shelf transformers are available for several applications. The high level of integration and the use of boundary mode operation results in a simple, clean, tightly regulated application solution to the traditionally tough problem of isolated power delivery.

Applications

  • Isolated Telecom Power Supplies
  • Isolated Auxiliary/Housekeeping Power Supplies
  • Isolated Industrial, Automotive and Medical Power Supplies
Part Models 8
1ku List Price Starting From $3.54

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511HMS#PBF

PRODUCTION

LT3511HMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

LT3511MPMS#PBF

PRODUCTION

LT3511MPMS#TRPBF

PRODUCTION

Apr 18, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0132

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511HMS#PBF

PRODUCTION

LT3511HMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0129

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT3511MPMS#PBF

PRODUCTION

LT3511MPMS#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511HMS#PBF

PRODUCTION

LT3511HMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

LT3511MPMS#PBF

PRODUCTION

LT3511MPMS#TRPBF

PRODUCTION

Apr 18, 2022

- 22_0050

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0132

arrow down

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LT3511EMS#PBF

PRODUCTION

LT3511EMS#TRPBF

PRODUCTION

LT3511HMS#PBF

PRODUCTION

LT3511HMS#TRPBF

PRODUCTION

LT3511IMS#PBF

PRODUCTION

LT3511IMS#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0129

arrow down

Laser Mark Conversion for 12-Lead MSOP Packages Assembled in ADPG and UTAC

LT3511MPMS#PBF

PRODUCTION

LT3511MPMS#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1517A

LT3511EMS Demo Board | 36V to 75VIN, VOUT = 5V @ 300mA

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DC1517A

LT3511EMS Demo Board | 36V to 75VIN, VOUT = 5V @ 300mA

LT3511EMS Demo Board | 36V to 75VIN, VOUT = 5V @ 300mA

Product Detail

Demonstration circuit 1517A is a monolithic high voltage isolated flyback converter featuring the LT3511. This demo circuit is designed for a 5V isolated output from an input voltage range of 36V to 75V. The maximum output current is up to 300mA. The circuit doesn’t require an opto-isolator, due to the output voltage being sensed directly from the primary side transformer winding. A third winding off the transistor is used to bias the LT3511 for highest efficiency.

Tools & Simulations

Tools & Simulations 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.

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