0.9V/10A PMBus POL Power Reference Design


Design files


This reference design is a 3.3Vin to 0.9V @ 10A power supply in a small form-factor, cost-effective design. It uses the TPS40400 controller in conjunction with the CSD87381P (a high and low side FET IC). The TPS40400 features full PMBUS telemetry for enhanced monitoring and control. The PMP20084 board is a 4-layer, 2-oz copper weight per layer board.

  • 3.3v input to 0.9V/10A output
  • 2inch x 2inch. 2oz, 4-layer. 0.835 in2 on a two sided PCB
  • 400KHz PMBus switching regulators for 10A low voltage rail
  • Supported by TI’s Fusion GUI Digital Power Designer
  • 100% green PMBus power solution for 0.9V/10A ASIC/FPGA core rail
Output voltage options PMP20084.1
Vin (Min) (V) 3.3
Vin (Max) (V) 3.6
Vout (Nom) (V) .9
Iout (Max) (A) 10
Output Power (W) 9
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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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.

TIDUD84.PDF (526 K)

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

TIDRR31.PDF (111 K)

Detailed schematic diagram for design layout and components

TIDRR32.PDF (55 K)

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

TIDRR33.PDF (69 K)

Detailed overview of design layout for component placement

TIDRR35.ZIP (5129 K)

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


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

TIDRR34.PDF (628 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

TPS404003-V to 20-V, 30-A, synchronous buck controller with PMBus™, including Telemetry

Data sheet: PDF | HTML

CSD87381P30-V, N channel synchronous buck NexFET™ power MOSFET, 3 mm x 2.5 mm LGA, 15 A

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP20084 Test Results May 30, 2017

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