10.8Vin~13.2Vin, 5Vout @ 300mA, Isolated Self-Driven Synchronous Flybuck Converter Reference Design
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


An isolated flybuck converter with self-driven synchronous rectification on the secondary side accepts an input voltage of 10.8Vin to 13.2Vin and provides an isolated output of 5Vout capable of supplying a maximum of 0.3A of current to the load.

  • Excellent regulation 4.9Vout ± 3.1% over entire line and load range without opto or discrete Vref
  • No need for pre-load on isolated output, without output voltage rise at light load
  • Improved load regulation, smaller voltage droop at heavy load
  • LM5017 wide Vin range 7.5V to 100V
  • Easy-to-design, cost effective Fly-Buck solution
  • Constant On-Time control, no loop compensation required

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Test Data

Get results faster with test and simulation data that's been verified.

Download Test Data

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

(Output Voltage 1)
Vin (Min) (V)10.8
Vin (Max) (V)13.2
Vout (Nom) (V)5
Iout (Max) (A).3
Output Power (W)1.5
Input TypeDC

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17507Q5A  30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 10.8 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17507Q5A VSONP (DQJ)| 8 Download Download
LM5017 Download Download
Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guide (1)
Title Type Size (KB) Date
PDF 1130 29 Sep 2015
Design files (5)
Title Type Size (KB) Date
ZIP 244 29 Sep 2015
ZIP 415 29 Sep 2015
PDF 691 29 Sep 2015
PDF 122 29 Sep 2015
PDF 292 29 Sep 2015

Support & training

TI E2E™ forums with technical support from TI engineers

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles