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


The TPS546C23 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. PMP20490 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 performance and efficiency with two sources of inductors.

  • 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 & ripple performance with two sources for the inductors

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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 (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD16325Q5  25-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 2.2 mOhm  MOSFETs  Sample & Buy Not Available
TPS546C23  4.5-V to 18-V, stackable 35-A synchronous SWIFT™ buck converter with PMBus and telemetry  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules
UCC27324  Non-inverting 4-A/4-A dual-channel low side gate driver  Gate drivers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD16325Q5 Download Download
TPS546C23 Download Download
UCC27324 Download Download
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Technical documentation

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User guide (2)
Title Type Size (KB) Date
PDF 2728 30 Jan 2017
PDF 3575 22 Nov 2016
Design files (7)
Title Type Size (KB) Date
ZIP 594 30 Jan 2017
ZIP 896 30 Jan 2017
PDF 2682 30 Jan 2017
PDF 245 30 Jan 2017
PDF 107 30 Jan 2017
PDF 649 30 Jan 2017
ZIP 607 22 Nov 2016
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Reference Designs (1)

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