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LM5125-CALC

LM5125(A) quick start calculator

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Latest version
Version: 1.4
Release date: Jul 29, 2026
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LM5125_Quickstart_Tool_V1p4.xlsx  — 3909 K

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Products
DC/DC controllers
LM5125-Q1 — Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking LM51251-Q1 — wide-VIN, synchronous multiphase boost controller with output voltage tracking and I2C LM51251A-Q1 — Automotive, 42V VIN, 2.2MHz dual-phase boost controller with VOUT tracking and I2C LM5125A-Q1 — Wide-VIN 2.2MHz dual-phase boost controller with VOUT tracking
Hardware development
Evaluation board
LM5125AEVM-BST — LM5125AEVM-BST evaluation module LM5125EVM-BST — LM5125 evaluation module

Release Information

LM5125(A) quick start calculator helps on design of the power stage, component selection and loop compensation.

What's new

  • Version 1.4 Corrected Bode plot DCM/CCM boundary.
  • Version 1.3 Updated CFG0, CFG1, CFG2 resistance range.
  • Version 1.2 Supported LM5125A-Q1 and LM5125-Q1.
  • Version 1.1 Fixed tB calculation. Added ACB influence to the bode plot. Added Crossover Frequency and Phase Margin result to the bode plot. Corrected RUVB and RUVT calculation.
  • Version 1.0 Initial Release