High Density 200 A (255 A Peak) 6 Phase DC-DC Buck Converter with PMBus Interface Reference Design


Design files


Advanced DCAP+ control is used to provide the high speed dynamic control needed for CPU, Memory and ASIC applications. Six 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. PMP9738 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 and lowest losses
  • DCAP+ control for excellent step load response, SVID and PMBus interfaces
  • Output voltage, switching frequency, number of phases can be adjusted "on the fly" through 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 and 3.3V biases and high speed dynamic test load
  • Schematic, BOM, layout and Test Report focusing on thermal performance and load dynamics
Output voltage options PMP9738.1
Vin (Min) (V) 10.8
Vin (Max) (V) 13.2
Vout (Nom) (V) 1
Iout (Max) (A) 200
Output Power (W) 200
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.

TIDU740.PDF (978 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

TIDC871.ZIP (918 K)

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

TIDRCK7.PDF (5686 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS536616-Phase, D-CAP+™ Step-Down VR12.x Server CPU VCORE

Data sheet: PDF
Power stages

CSD95372BQ5M60A Synchronous Buck NexFET™ Smart Power Stage

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP9738 Test Results Jan. 14, 2015

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