Isolated Ultra-Low Power Design for 4 to 20 mA Loop Powered Transmitters
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


The objective of this design is to provide a turn-key solution able to power the electronics of isolated loop powered 4 to 20 mA transmitters or other low power applications with limited input current budget. It addresses the key requirements of such applications like operating over wide input voltage range, providing isolated and no-isolated noise-free outputs and offering a complete set of protection features. Multiple test points on the board, a dual layer - single side populated construction and a comprehensive documentation enable easy testing, modification and optimization by the user.

Watch the TIDA-00349 Overview video, covering the same isolated power topology as used in the TIDA-00167 NOW

  • Operates over a wide input voltage range from 8 to 33
  • Provides isolated and non-isolated 3.3V rails, selectable between low Iq LDOs and high PSRR LDOs
  • Highly efficient isolated DC/DC converter with constant switching frequency achieves more than 70% efficiency at 5 to 8 mW load
  • Contains input surge protection (EN 61000-4-5: ±1 kV), reverse protection, current limiters for hot-plug and surge and protects a transmitters loop current sense circuit
  • On-board ripple filter to address conducted EMI requirements (EN 55011) and decoupling from loop current
  • Fully functional board which can easily be tested, modified and optimized

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

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
TPS27082L  8-V, 3-A, 44-mΩ load switch with adj. rise time and hysteresis  Power switches  Not Available Not Available
TPS60402  60mA Charge Pump Voltage Inverter with Fixed 50kHz Operation  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS27082L Download Download
TPS60402 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 11528 20 Jun 2014
White paper (1)
Title Type Size (KB) Date
PDF 1238 12 Feb 2015
Design files (7)
Title Type Size (KB) Date
ZIP 278 29 Sep 2014
ZIP 825 29 Sep 2014
PDF 6007 29 Sep 2014
PDF 1881 29 Sep 2014
PDF 260 29 Sep 2014
PDF 47 29 Sep 2014
PDF 3288 29 Sep 2014
Related Tools & Software

Reference Designs (5)

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