12Vin, 3.3V/1.7A Low Cost, Small Form Factor, Synchronous Buck Reference Design


Design files


The PMP9725 reference design generates a 3.3V output from a 12V input, using the TPS562209 synchronous buck converter.  This converter uses the DCAP2 control method to minimize output capacitance while eliminating feedback compensation components and still providing an excellent load transient response.  The converter switches at 650kHz.  The peak efficiency of this design is 90%.

  • Utilizes DCAP2 control method
  • 90% peak efficiency
  • Small 15mm x 8mm footprint
  • Low profile < 3mm
  • Test report available
Output voltage options PMP9725.1
Vin (Min) (V) 10
Vin (Max) (V) 14
Vout (Nom) (V) 3.3
Iout (Max) (A) 1.7
Output Power (W) 5.61
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.


Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRG44.PDF (98 K)

Detailed schematic diagram for design layout and components

TIDRG45.PDF (78 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRG46.PDF (74 K)

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 converters (integrated switch)

TPS56220917 V Input, 2A Synchronous Step-Down Regulator in SOT-23

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP9725 Test Results Jul. 16, 2015

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