Dual-channel automotive synchronous buck controller evaluation module
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The LM5143-Q1-EVM2100 high density evaluation module (EVM) is designed to showcase the performance of the LM5143-Q1 high performance, dual-channel, automotive synchronous buck DC/DC buck controller. It operates over a wide input voltage range of 3.5 V to 36 V to deliver fixed 5-V and 3.3-V outputs with better than 1% setpoint accuracy and currents up to 7 A per channel. By virtue of the LM5143-Q1's minimum on-time of 65 ns, operation at very low duty cycle is feasible. The LM5143-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 during voltage-sag conditions, programmable soft-start to reduce inrush current, hiccup-mode overcurrent protection and thermal shutdown. Open-drain PGOOD indicator and SYNC IN /  SYNC OUT features are also provided.

  • 3.5-V to 36-V input voltage range
  • 5-V and 3.3-V output voltages with 1% setpoint accuracy
  • Rated for up to 7 A of load current per channel
  • Automotive grade power stage components, including MOSFETs, inductors and capacitors
  • 2.1-MHz switching synchronizable up or down with external clock
  • Fully assembled, tested and proven PCB layout with small footprint

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Dual-channel automotive synchronous buck controller evaluation module


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Technical documentation
User guides (1)
Title Type Size (KB) Date
PDF 2531 16 Apr 2020
More literature (1)
Title Type Size (KB) Date
PDF 36 25 Apr 2019

Design tools & simulation (1)

Name Part Number Tool Type
LM5143-Q1 controller quickstart design tool  LM5143DESIGN-CALC  Calculation tools 

TI Devices (1)

Part Number Name Product Family
LM5143-Q1  3.5-V to 65-V low Iq, dual, 2-phase synchronous buck DC-DC controller  Step-down (buck) regulators 

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