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LM25145DESIGN-CALC

LM25145 Synchronous Buck Controller Design Tool

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LM25145DESIGN-CALC

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Overview

Welcome to the LM25145 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM25145 42V synchronous buck controller. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.

Features
  • Determine output filter inductance and input and output filter capacitances
  • Select components for soft-start, input UVLO, OCP and output voltage setpoint
  • Optimize compensation values and pole/zero placement in terms of control loop stability using crossover frequency as a performance metric
  • Inspect regulator efficiency and component power dissipations
  • Analyze efficiency based on selected power MOSFET parameters
  • Review auto-generated schematic, BOM list and solution size estimate
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Calculation tool

LM25145DESIGN-CALC — LM25145 Synchronous Buck Controller Design Tool

Supported products & hardware

Supported products & hardware

Hardware development
Evaluation board
LM5145EVM-HD-20A — LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module LM5146-Q1-EVM12V — Synchronous buck controller evaluation module
Download

LM25145DESIGN-CALC — LM25145 Synchronous Buck Controller Design Tool

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Latest version
Version: A5
Release date: 19 Sep 2024
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LM25145_quickstart_calculator_A5.xlsm  — 3247 K

LM25145 synchronous buck controller quickstart calculator

MD5 checksum
Hardware development
Evaluation board
LM5145EVM-HD-20A — LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module LM5146-Q1-EVM12V — Synchronous buck controller evaluation module

Additional resources you might need

Calculation tool

LM25145DESIGN-CALC — LM25145 Synchronous Buck Controller Design Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM25145 — 6V to 42V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
Hardware development
Evaluation board
LM5145EVM-HD-20A — LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module LM5146-Q1-EVM12V — Synchronous buck controller evaluation module
Download

LM25145DESIGN-CALC — LM25145 Synchronous Buck Controller Design Tool

close
Latest version
Version: 01.00.00.0D
Release date: 18 Aug 2021
open-in-new

View all versions

download

LM25145_quickstart_calculator_A4.zip  — 3195 K

MD5 checksum
Products
AC/DC & DC/DC controllers (external FET)
LM25145 — 6V to 42V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
Hardware development
Evaluation board
LM5145EVM-HD-20A — LM5145 Wide VIN Synchronous Buck Controller High Density Evaluation Module LM5146-Q1-EVM12V — Synchronous buck controller evaluation module

Technical documentation

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Type Title Date
Technical article Synchronous buck controller solutions support wide VIN performance and flexibility PDF | HTML 29 Jun 2017

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