4-Phase, 160-A synchronous buck converter reference design for communications processor power


Design files


This reference design uses four TPS546D24A converters with integrated MOSFETs to support a full load of 160A at a 0.9V output. The system operates at a switching frequency of 650 kHz and has a PMBus interface that can be used to configure key converter parameters, including internal compensation. The detailed test report includes efficiency, thermal, stability, and load transient results.

  • 12V input, 0.9V output with full load of 160A
  • Very good output voltage regulation accuracy of 0.11% 
  • Accurate load sharing between 4 integrated converters
  • Fixed-frequency current-mode control and programmable internal compensation
  • PMBus interface for configuration and monitoring of key converter parameters
  • Designed for communications base-band and remote radio units
Output voltage options PMP21814.1
Vin (Min) (V) 9
Vin (Max) (V) 13
Vout (Nom) (V) .9
Iout (Max) (A) 160
Output Power (W) 144
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase
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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.

TIDT090A.PDF (1901 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRZ40A.PDF (391 K)

Detailed schematic diagram for design layout and components

TIDRZ41A.PDF (102 K)

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

TIDRZ42A.PDF (340 K)

Detailed overview of design layout for component placement

TIDRZ44A.ZIP (1921 K)

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


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

TIDRZ43.PDF (1771 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

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Data sheet: PDF
Buck converters (integrated switch)

TPS546D24A2.95-V to 16-V, stackable 40-A synchronous SWIFT™ step-down converter with pin-strapping and PMBus®

Data sheet: PDF
Buck modules (integrated inductor)

TPS8213017-V input 3-A step-down converter module with integrated inductor

Data sheet: PDF | HTML
N-channel MOSFETs

CSD16408Q525-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 6.8 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report 4-phase, 160-A Synchronous Buck Converter Reference Design (Rev. A) Oct. 24, 2019

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