High Density 160 A (210 A peak) 4 Phase DC-DC Buck Converter with PMBus Interface Reference Design


Design files


Fixed frequency voltage mode control is used for CPU, Memory and ASIC applications where a predictable frequency and/or synchrnization to an external clock is needed.  Four high-current synchronous power stages provide the high currents and low losses needed for these applications. Multi-phase also allows output ripple cancellation and effective higher bandwidth control for a given switching frequency. PMP9131 focuses on ease of electrical testing and ability to make changes "on the fly" thru the PMBus interface. On-board bias supplies and a high speed dynamic load round out the rich test interface.

  • Multiple fully synchronous power stages for high currents & lowest losses
  • Fixed frequency voltage mode control allows for user selection of switching frequency and synchronization to an external clock
  • Output voltage, current limit and fault thresholds/responses can be adjusted "on the fly" thru the PMBus interface
  • Focus of evaluation board is on ease of electrical testing with almost all parts on top side
  • Rich test interface including PMBus socket, 5V & 3.3V biases and high speed dynamic test load
  • Schematic, BOM, layout, and Test Report focusing on thermal performance & load dynamics
Output voltage options PMP9131.1
Vin (Min) (V) 10.8
Vin (Max) (V) 13.2
Vout (Nom) (V) 1
Iout (Max) (A) 160
Output Power (W) 160
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Boost- Synchronous^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.

TIDU777.PDF (862 K)

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


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

TIDC907.ZIP (483 K)

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

TIDRCW3.PDF (4623 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS40428Dual Output, 2-Phase, Stackable PMBus Synchronous Buck Driverless Controller

Data sheet: PDF | HTML
Power stages

CSD95378BQ5M60A Synchronous Buck NexFET™ Smart Power Stage with TAO offset

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9131 Test Results Feb. 11, 2015

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