Class 1 Non-isolated Buck Converter (5V/560mA) for PoE PD Applications Reference Design


Design files


This converter is used for Class 1 PoE PD applications where isolation is not required.  The TPS2378 PD controller plus LM5006 buck converter provide 5V/560mA with good efficieny in a small size.  The LM5006 can be configured with a diode rectifier for lowest cost or a synchronous FET rectifier for improved efficiency.

  • Non-isolated 5V/560mA output
  • Diode rectifier for lowest cost
  • Synchronous rectifier for improved efficiency
  • Small size
  • Test report included
Output voltage options PMP9676.1
Vin (Min) (V) 36
Vin (Max) (V) 57
Vout (Nom) (V) 5
Iout (Max) (A) .56
Output Power (W) 2.8
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Non Sync^Buck- Synchronous^POE
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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.


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

TIDCB27.ZIP (638 K)

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


Includes TI products in the design and potential alternatives.

Powered devices

TPS2378IEEE 802.3at PoE High-Power PD interface with AUX Control

Data sheet: PDF | HTML
Buck converters (integrated switch)

LM50066-75V Wide Vin, 600mA Constant On-Time Non-Synchronous Buck Regulator

Data sheet: PDF

Technical documentation

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Type Title Date
* Test report PMP9676 Test Results Sep. 28, 2015
Technical article Power over Ethernet: New applications every day Oct. 14, 2015

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