LM5143-Q1 controller quickstart design tool




Welcome to the LM5143-Q1 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck regulator based on the LM5143-Q1 65-V synchronous buck DC/DC controller with low IQ. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.
  • Configure the controller for dual-output, two-phase or multi-phase configurations.
  • Determine buck inductance and input and output capacitances
  • Select components for soft-start, hiccup-mode restart, OCP, switching frequency and output voltage setpoint(s)
  • Optimize compensation values and pole/zero placement in terms of control loop stability using crossover frequency as a performance metric
  • Inspect regulator efficiency, solution size, and component power dissipations
  • Review auto-generated schematic and BOM list
  • Determine EMI filter components and spread spectrum modulating frequency


Calculation tool

LM5143DESIGN-CALC LM5143-Q1 controller quickstart design tool

Buck controllers (external switch)
LM5143-Q1 3.5-V to 65-V low Iq, dual, 2-phase synchronous buck DC-DC controller
Evaluation board
LM5143-Q1EVM-2100 Dual-channel automotive synchronous buck controller evaluation module

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