12Vin 1V 50A TPS40422 & Power Block II CSD87384 2 Phases w/PMBus Interface Reference Design


Design files


It is a two phase Synchronous Buck converter to provide high current with low ripple and fast dynamic response for high speed processor core applications. Same approach can also be used to power Memory and Input / Output power voltages, typically 1.2V to 3.3V. The two phase interleave reduces output ripple and allows faster response to rapidly changing loads. The two phases distribute power loss to eliminate need for added heat sink hardware. The "Project File" for the TPS40422 to communicate with TI's Fusion GUI is included. Output voltage and current limit can be adjusted and monitored thru the GUI. Additional settings can be accessed thru the same GUI. Test Report includes thermal images to show load capability, both with and without fan cooling. Testing done at 12Vin, where voltage stresses, losses and output ripple greatest. Design will work also at 5Vin with same high speed control loop, due to Input Voltage Feed Forward in the TPS40422.

Output voltage options PMP8999.1
Vin (Min) (V) 4.5
Vin (Max) (V) 13.2
Vout (Nom) (V) 1
Iout (Max) (A) 50
Output Power (W) 50
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.


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

SLUC518.ZIP (315 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

TPS40422Dual Output or Multiphase Synchronous Buck Controller with PMBus

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

Technical documentation

No results found. Please clear your search and try again.
View all 1
Type Title Date
Test report PMP8999 Test Results Dec. 12, 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. ​​​​​​​​