98% 135W Single Phase Boost Reference Design
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Key Document


PMP21274 is a single-phase boost utilizing the LM5122 controller. This reference design can operate from 12V to 50V. The design has an output of 54V and capable of sourcing 2.5A continuous current. LM5112 has a bypass function where Vin is equal or greater than the set output voltage, the device will bypass Vin via the high side sync FET. Switching frequency is set to 230kHz, and a 4 layer PCB is used.

  • Synchronous rectification to improve efficiency, 98% peak efficiency
  • Low BOM count and cost, compact solution size
  • Wide Vin operation with input voltage bypass

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Design Files

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(Output Voltage 1)
Vin (Min) (V)12
Vin (Max) (V)50
Vout (Nom) (V)54
Iout (Max) (A)2.5
Output Power (W)135
Input TypeDC
TopologyBoost- Synchronous

TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM5122  3-65V Wide Vin, Current Mode Synchronous Boost Controller with Multiphase Capability  Step-up (boost)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LM5122 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1126 01 Dec 2017
Design files (6)
Title Type Size (KB) Date
ZIP 443 01 Dec 2017
ZIP 765 01 Dec 2017
PDF 634 01 Dec 2017
PDF 141 01 Dec 2017
PDF 99 01 Dec 2017
PDF 166 01 Dec 2017

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