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


Design files


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
Output voltage options PMP11220.1
Vin (Min) (V) 20
Vin (Max) (V) 28
Vout (Nom) (V) 5
Iout (Max) (A) 6
Output Power (W) 30
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.

TIDUAG5.PDF (1273 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


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


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS53819A3-V to 28-V, 40-A, synchronous D-CAP2 buck controller with PMBus

Data sheet: PDF | HTML
N-channel MOSFETs

CSD18537NQ5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 13 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP11220 Test Results Aug. 21, 2015

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