LM5017 Flybuck Quad Isolated Output Power Supply without Opto-coupler
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical Documents

Support & Training

Order Now

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


The LM5017 Flybuck reference design provides multiple isolated outputs to supply the bias voltage needed in a PLC I/O module. It generates 4 isolated outputs: ±15V@50mA and ±5V@100mA; it can cover most of the required voltage rails in the I/O module, such as the OP-AMP, DAC bias, RS-485 transmitter and digital isolator power supplies. In the Flybuck, the regulation is done on the primary side, and thus no opto-coupler is needed. The overall load/line regulation for each output is within +/-5%. The input voltage range is from 17V to 32V.

  • Ideal for PLC I/O modules, or industrial applications requiring multiple bias supplies
  • Quad isolated outputs,  +/-15V@50mA, +/-5V@100mA
  • Designed for an operating range of 17-32V
    • Uses the LM5017 capable of 9 to 100V Input operation for withstanding transients and surge voltage
  • +/-5% Vout regulation accuracy across line and load variations
  • Tested and supported with design files, reference board available upon request

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)
(Output Voltage 2)
(Output Voltage 3)
(Output Voltage 4)
Vin (Min) (V)17171717
Vin (Max) (V)32323232
Vout (Nom) (V)15-155-5
Iout (Max) (A).
Output Power (W).

TI Devices (1)

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
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)
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 Documents

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

User guides (3)
Title Type Size (KB) Date
PDF 884 12 Sep 2013
PDF 884 12 Sep 2013
PDF 884 12 Sep 2013
White papers (1)
Title Type Size (KB) Date
PDF 980 29 Sep 2015
Design files (5)
Title Type Size (KB) Date
ZIP 163 14 Apr 2014
PDF 884 12 Sep 2013
PDF 205 12 Sep 2013
PDF 24 12 Sep 2013
PDF 121 12 Sep 2013
More literature (2)
Title Type Size (KB) Date
PDF 552 13 Mar 2015
PDF 783 21 Aug 2014

Support & training

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