Synchronous buck controller evaluation module
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The LM5146-Q1-EVM12V high density evaluation module (EVM) is designed to showcase the performance of the LM5146-Q1 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 15 V to 85 V to deliver a fixed 12-V output with better than 1% setpoint accuracy and currents up to 8A. By virtue of the LM5146-Q1's minimum on-time of 40ns, operation at very low duty cycle is feasible. The LM5146-Q1 offers a full suite of protection features to ensure protection of the regulator during fault conditions. These include undervoltage lockout to ensure proper operation duing voltage-sag conditions, programmable soft-start to reduce inrsuh current, hiccup-mode overcurrent protection and thermal shutdown. Precision enable, open-drain PGOOD indicator and SYNC IN /  SYNC OUT features are also provided.

  • 15-V to 85-V input voltage range
  • 12-V output voltage with 1% setpoint accuracy
  • Rated for up to 8 A of load current
  • 400-kHz switching frequency
  • Resistor divider to EN/UVLO to faciltate programmable input voltage UVLO
  • Fully assembled, tested and proven PCB layout with small footprint

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Synchronous buck controller evaluation module


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Technical documentation
Datasheet (1)
Title Type Size (KB) Date
PDF 2729 15 Nov 2018
User guides (1)
Title Type Size (KB) Date
PDF 1569 10 Aug 2018
Design files (1)
Title Type Size (KB) Date
ZIP 7838 26 Feb 2019
More literature (1)
Title Type Size (KB) Date
PDF 38 02 Jan 2019

Design tools & simulation (1)

Name Part Number Tool Type
LM5146-Q1 synchronous buck controller quickstart design tool  LM5146DESIGN-CALC  Calculation tools 

TI Devices (1)

Part Number Name Product Family
LM5146-Q1  100-V synchronous buck DC/DC controller with wide duty cycle range  Step-down (buck) regulators 

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