300W 12Vout 4-Switch Buck-Boost for Industrial PC Reference Design


Design files


The PMP21278 reference design is a 300W power supply utilizing the LM5176 4-switch buck-boost controller for industrial applications. This design can operate from 9V to 50V. The design has a 12V output and capable of sourcing 25A continuous current. Switching frequency is set to 230kHz. PMP21278 is assembled on SV601348A PCB. Three 6.8mF, 65V rated electrolytic capacitors are used to damp the input supply’s wiring inductance for all test data taken on this test report.

  • 9V to 50Vin, output 12V @ 25A
  • Achieving peak efficiency of 97%
  • over current, over voltage and over temperature protection
  • High power density
Output voltage options PMP21278.1
Vin (Min) (V) 9
Vin (Max) (V) 50
Vout (Nom) (V) 12
Iout (Max) (A) 25
Output Power (W) 300
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck Boost- 4 Switch
Personal electronics
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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.

TIDUE39.PDF (1364 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


Files used for 3D models or 2D drawings of IC components


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

TIDRVC3.PDF (1436 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM517655V wide VIN synchronous 4-switch buck-boost controller

Data sheet: PDF | HTML

CSD17573Q5B30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 1.45 mOhm

Data sheet: PDF | HTML

CSD19502Q5B80-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.1 mOhm

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP21278 Test Results Jan. 04, 2018

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