TPS53819A Synchronous Step-Down Regulator with PMBus for Industrial Bus POL Applications
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Key Document


The PMP11220 reference design is a high efficiency, high power density, PMBus synchronous buck converter design for programming, and margining the power supply including output voltage.  With a nominal input of 24V meant for industrial bus applications, this design allows for programmable output voltages and minimal power loss, all in a small board space. DCAP2 control mode requires no loop compensation, enabling ease of design, while offering ultra-fast load transient response and use with all MLCC output caps.

  • 94% Efficiency
  • Adjustable switching frequency and output voltage via PMBus
  • High Power Density
  • Minimal overshoot on switch node while maintaining high efficiency
  • This circuit design is tested and includes a full test report, schematic, and gerber files
  • Ultra-stable design: >75degrees of Phase Margin

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Schematic/Block Diagram

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Design Guide

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Design Files

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(Output Voltage 1)
Vin (Min) (V)20
Vin (Max) (V)28
Vout (Nom) (V)5
Iout (Max) (A)6
Output Power (W)30
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18537NQ5A  60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 13 mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
TPS53819A  3-V to 28-V, 40-A, synchronous D-CAP2 buck controller with PMBus  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18537NQ5A VSONP (DQJ)| 8 Download
TPS53819A Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 1224 21 Aug 2015
Design files (4)
Title Type Size (KB) Date
ZIP 346 21 Aug 2015
PDF 95 21 Aug 2015
PDF 177 21 Aug 2015
PDF 238 21 Aug 2015

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