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

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(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)13.2
Vout (Nom) (V)1
Iout (Max) (A)50
Output Power (W)50
Input TypeDC
TopologyBuck- Multiphase

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS40422  Dual Output or Multiphase Synchronous Buck Controller with PMBus  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS40422 Download Download
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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 629 12 Dec 2013
Design files (4)
Title Type Size (KB) Date
ZIP 315 12 Dec 2013
PDF 830 12 Dec 2013
PDF 113 12 Dec 2013
PDF 165 12 Dec 2013

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