154W Synchronous Boost Converter Reference Design
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Key Document


PMP21277 is a single-phase synchronous boost converter reference design using the LM5122 boost controller IC. The design accepts an input voltage of 10.8Vin to 13.2Vin (12Vin Nominal) and provides an output of
20.5Vout capable of supplying 7.5A of continuous current to the load. The design was built on the PMP7924 RevA PCB, which was modified to the PMP21277 design configuration and requirements. The PCB is a 4-layer board with 1oz copper on outer layers and 0.5oz Copper on inner layers.

  • High efficiency synchronous operation enables 97.6% peak effiiciency
  • Capable of being synchronized to external clock signal
  • Controller IC includes high current FET drivers

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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)20.5
Iout (Max) (A)7.5
Output Power (W)153.75
Input TypeDC
TopologyBoost- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18540Q5B  60V, N ch NexFET MOSFETâ„¢, single SON5x6, 2.2mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost) regulators  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18540Q5B VSON-CLIP (DNK)| 8 Download Download
LM5122 Download Download
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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 674 11 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 203 11 Dec 2017
ZIP 501 11 Dec 2017
PDF 564 11 Dec 2017
PDF 118 11 Dec 2017
PDF 100 11 Dec 2017
PDF 162 11 Dec 2017

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