High-Density 12Vin, 1.2Vout, 60A POL Reference Design with Stacked TPS546C20A PMBus DCDC Converters
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Key Document


The TPS546C20A provides a single IC for both control & the synchronous power stage for high current DC/DC applications and allows doubling of the current capability with use of two of the same part.  Multi-phase also allows output ripple cancellation and effective higher bandwidth control for a given switching frequency. PMP20292 shows a high current two phase application with inductors on top of control ICs for smaller footprint and two on board dynamic loads. The Test Report shows the loss sharing between the two power stages and transient load response with each of the two on board dynamic loads.

  • Complete high current 2 phase DC/DC converter with all the advantages of phase interleaving using only two of the single phase parts
  • Fixed frequency voltage mode control allows for user selection of switching frequency and synchronization to an external clock
  • Inductors on top of controllers for small overall footprint
  • Rich test interface including a self contained high speed dynamic test load and a Signal Generator driven dynamic test load
  • Schematic, BOM, layout and Test Report focusing on efficiency & load / thermal sharing and load dynamics with each of the on board test loads

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Design Files

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(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)13.2
Vout (Nom) (V)1.2
Iout (Max) (A)60
Output Power (W)72
Input TypeDC
TopologyBuck- Multiphase
Buck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS546C20A  4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and pin-strapping  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS546C20A Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 3575 22 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 607 22 Nov 2016
ZIP 898 22 Nov 2016
PDF 2685 22 Nov 2016
PDF 247 22 Nov 2016
PDF 141 22 Nov 2016
PDF 670 22 Nov 2016

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