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

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)10.8
Vin (Max) (V)13.2
Vout (Nom) (V)1
Iout (Max) (A)160
Output Power (W)160
Input TypeDC
TopologyBoost- Synchronous
Buck- Multiphase
Designed forASIC

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD95378BQ5M  60A Synchronous Buck NexFET™ Smart Power Stage with TAO offset  MOSFETs  Sample & Buy Not Available
TPS40428  Dual Output, 2-Phase, Stackable PMBus Synchronous Buck Driverless Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD95378BQ5M LSON-CLIP (DQP)| 12 Download Download
TPS40428 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 794 11 Feb 2015
Design files (5)
Title Type Size (KB) Date
ZIP 483 11 Feb 2015
PDF 4623 11 Feb 2015
PDF 372 11 Feb 2015
PDF 112 11 Feb 2015
PDF 315 11 Feb 2015

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