High Density 30W DC-DC PMBus Buck Converter with Inductor Mounted Over the Converter to Save Space
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This design has inductor over converter to achieve 30 A conversion in 1" by 0.6" (2.5 cm by 1.5 cm) footprint. The DCAP control of the controller provides a high speed control loop which is needed for applications with large rapidly varying loads, such as microprocessors. A high speed dynamic load is also included to verify this capability.


  • Fully synchronous controller for lowest losses
  • DCAP2 control for excellent step load response
  • Compact design with inductor over controller
  • Thermal performance well documented both with & without fan
  • On board high speed dynamic test load to verify dynamic performance
  • Schematic, BOM, layout and Test Report focusing on thermal performance & load dynamics

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

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Test Data

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Design Files

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(Output Voltage 1)
Vin (Min) (V)10.8
Vin (Max) (V)13.2
Vout (Nom) (V)1
Iout (Max) (A)30
Output Power (W)30
Input TypeDC
TopologyBuck- Integrated Switch
Buck- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
TPS544C20  4.5-V to 18-V, 30-A synchronous SWIFT™ buck converter with PMBus programmability and monitoring  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
TPS544C20 Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 420 01 Dec 2014
Design files (5)
Title Type Size (KB) Date
ZIP 283 01 Dec 2014
PDF 1546 01 Dec 2014
PDF 165 01 Dec 2014
PDF 128 01 Dec 2014
PDF 172 01 Dec 2014

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