180-W, Dual-Channel, Step-Down Converter Reference Design with 97% Efficiency for Server PSU


Design files


This is a reference design for server PSU, PC PSU and other step-down converter applications that implements a 180-W buck, dual-channel DC/DC converter with a regulatory 12-V DC input voltage designed to provide the terminal load voltage with greater than 97% efficiency and good thermal performance. The switching frequency synchronization between the dual channels is easily realized. The true differential remote sense of the dual outputs compensates the line voltage drop providing more accurate voltage for the terminal load. For improved high-power density and a low profile, this integrated circuit reference design uses a planar inductor to replace the traditional discrete inductor. This design has protection and temperature-sense functions.

  • 180-W dual output buck converter
  • Efficiency: 96% (typ) at 180-W load; 97% (typ) at 83-W load
  • Switching frequency synchronization between dual channels
  • Differential remote sensing for both output channels
  • Planner inductor as output inductor
  • Compact form factor (47 mm x 59 mm) for compatibility with server PSU application

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDUD57.PDF (2565 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDRRL2.ZIP (1084 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Analog temperature sensors

LM20±1.5°C Analog Output Temperature Sensor

Data sheet document-pdfAcrobat PDF open-in-new HTML
Buck converters (integrated switch)

TPS543C204-V to 14-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide 180-W, Dual-Channel, Step-Down Converter Ref Design w/ 97% Efficiency Jun. 28, 2017
Application note Designing With the Improved TL431LI (Rev. A) Jun. 28, 2019
Technical article Lightning-fast internally-compensated ACM topology – what can it do for you? May 18, 2017

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