24V Input Voltage Two Phase Synchronous Buck Converter (12V@20A) Reference Design
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Key Document


This two phase synchronous buck converter allows smaller components with better distributed thermal performance than an equivalent single phase design. It achieves high efficiency, uses small inductors and easily fits in a small PCB area of 70mm x 70mm.

  • High efficiency (95% with 20A load at 24Vin)
  • Small inductors
  • Excellent current sharing between phases

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Schematic/Block Diagram

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Design Files

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(Output Voltage 1)
Vin (Min) (V)22.8
Vin (Max) (V)25.2
Vout (Nom) (V)12
Iout (Max) (A)20
Output Power (W)240
Input TypeDC
TopologyBuck- Multiphase

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18503Q5A  40V, N ch NexFET MOSFETâ„¢, single SON5x6, 4.3mOhm  MOSFETs  Sample & Buy Not Available
LM25119  4.5-42V Wide Vin, Current Mode Dual Synchronous Buck Controller  Step-down (buck) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18503Q5A VSONP (DQJ)| 8 Download
LM25119 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 2268 02 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 173 02 Nov 2016
ZIP 142 02 Nov 2016
PDF 163 02 Nov 2016
PDF 105 02 Nov 2016
PDF 41 02 Nov 2016
PDF 118 02 Nov 2016

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