60A 2-Phase PMBus Synchronous Buck Converter Reference Design
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This design is for a 60A 2-phase Synchronous Buck Converter, incorporating the TPS40428 PMBus driverless PWM controller and the CSD95372B Smart Power Stage. The design accepts a 10V to 14V input, and provides a 1V at 60A output. The PMBus design enables programming, configuration, control, sequencing, voltage margining, Adaptive Voltage Scaling (AVS), and accurate current, voltage and temperature monitoring of high-power ASIC power supplies in Enterprise Storage/NAS/SAN, Ethernet Switches, Optical Networks, and Base Stations.

  • 10V to 14V Input, 1V 60A Output
  • PMBus interface for programming, margining, AVS, and telemetry
  • 20mV pk-to-pk Output Voltage Ripple at 12VIN, 1VOUT/100A
  • 624mm² total power supply area
  • Less than 10W Power Loss at 60W Output Power
  • 86% Efficiency at 12VIN, 1Vout/60A

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(Output Voltage 1)
Vin (Min) (V)10
Vin (Max) (V)14
Vout (Nom) (V)1
Iout (Max) (A)60
Output Power (W)60
Input TypeDC
TopologyBuck- Multiphase
Designed forASIC

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD95372BQ5M  60A Synchronous Buck NexFET™ Smart Power Stage  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)
CSD95372BQ5M 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 902 10 Feb 2015
Design files (3)
Title Type Size (KB) Date
ZIP 256 10 Feb 2015
PDF 106 10 Feb 2015
PDF 112 10 Feb 2015

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