LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module
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Technical documentation

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Key Document


The LM5145EVM-HD-20A high density evaluation module (EVM) is designed to showcase the performance of the LM5145 high performance, synchronous buck DC-DC buck controller with wide input voltage range. The design is packaged in a miniature footprint with low component count. It operates over a wide input voltage range of 24 V to 72 V to deliver a fixed 5-V output with better than 1% setpoint accuracy and currents up to 20A. By virtue of the LM5145's minimum on-time of 40ns, operation at very low duty cycle is feasible. The LM5145 offers a full suite of protection features to ensure protection of the regulator during fault conditions. These include undervoltage lockout to ensure proper operation during voltage-sag conditions, programmable soft-start to reduce inrush current, hiccup-mode overcurrent protection and thermal shutdown. Precision enable, open-drain PGOOD indicator and SYNC IN /  SYNC OUT features are also provided.

  • 24V to 72V input voltage range
  • 5V output voltage, adjustable from 3.3V to 8V
  • Delivers up to 20A of load current
  • Free-running switching frequency of 220kHz, synchronizable to an external clock from -20% to +50%
  • Fully assembled, tested and proven PCB layout with 30-mm x 15-mm total footprint

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LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module


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Technical documentation
Datasheet (3)
Title Type Size (KB) Date
PDF 3169 16 May 2020
PDF 2729 15 Nov 2018
PDF 2099 22 Jun 2017
User guides (2)
Title Type Size (KB) Date
PDF 1569 10 Aug 2018
PDF 1386 07 Jun 2017
More literature (1)
Title Type Size (KB) Date
PDF 38 02 Jan 2019

Design tools & simulation (1)

Name Part Number Tool Type
LM5145 Synchronous Buck Controller Design Tool  LM5145DESIGN-CALC  Calculation tools 

TI Devices (2)

Part Number Name Product Family
LM25145  6V to 42V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range  Step-down (buck) regulators 
LM5145  75V Synchronous Buck Controller With Wide Input Voltage and Duty Cycle Ranges  Step-down (buck) regulators 

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