Reference Design - High Efficiency Two-Phase Synchronous Buck Delivers 300W


Design files


This two-phase synchronous buck operates from 24VDC and supplies an output of 15V@20A. Operation at 300KHz (per phase) delivers small size and greater than 96% efficiency.

  • Efficiency approaches 97% at 12A load
  • Board length is approximately 94 mm
  • Reduced component size due to two phase operation
  • Test report available
Output voltage options PMP9700.1
Vin (Min) (V) 23
Vin (Max) (V) 25
Vout (Nom) (V) 15
Iout (Max) (A) 20
Output Power (W) 300
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase

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.

TIDU941.PDF (3057 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

TIDCA66.ZIP (190 K)

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)

LM251194.5-42V Wide Vin, Current Mode Dual Synchronous Buck Controller

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18503Q5A40-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.3 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Test report PMP9700 Test Results Apr. 15, 2015

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