High Current Four Phase Synchronous Buck 5V@55A Reference Design


Design files


Two TPS40140 control ICs are used to build a four phase synchronous buck converter.  The input voltage is 12V with an output of 5V at up to 55A.  A four phase design allows for very high efficiency and helps to spread the heat out on the PCB.  The design was built and tested using PMP2064 PCBs, please see that design for PCB and gerber info.

Output voltage options PMP9035.1
Vin (Min) (V) 10
Vin (Max) (V) 14
Vout (Nom) (V) 5
Iout (Max) (A) 55
Output Power (W) 275
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Multiphase^Buck- Synchronous
?? View video with transcript Video

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.

SLUUAU1.PDF (1980 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


Includes TI products in the design and potential alternatives.

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

TPS40140Stackable 2 Channel Multiphase or 2 Channel Independent Output Controller

Data sheet: PDF | HTML

Technical documentation

No results found. Please clear your search and try again.
View all 1
Type Title Date
Test report PMP9035 Test Results Oct. 23, 2013

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​