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LM5149-LM25149DESIGN-CALC

LM5149 and LM25149 controller quickstart design tool

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LM5149-LM25149DESIGN-CALC

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Overview

Welcome to the quickstart design tool for the LM5149, LM5149-Q1 and LM25149, LM25149-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the above controller family. 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 capacitances
  • Select components for input UVLO, OCP, output voltage setpoint and AEF
  • 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

LM5149-LM25149DESIGN-CALC — LM25149 Design Calculation Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM25149 — 42-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM25149-Q1 — 42-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149 — 80-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149-Q1 — 80-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter
Hardware development
Evaluation board
LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module
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LM5149-LM25149DESIGN-CALC — LM25149 Design Calculation Tool

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Latest version
Version: 01.00.00.0B
Release date: 12 Oct 2022
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LM25149 Design Calculation Tool (zip)  — 4226 K

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Products
AC/DC & DC/DC controllers (external FET)
LM25149 — 42-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM25149-Q1 — 42-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149 — 80-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149-Q1 — 80-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter
Hardware development
Evaluation board
LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

Release Information

The design resource accessed as www.ti.com/lit/zip/snvr496 or www.ti.com/lit/xx/snvr496b/snvr496b.zip has been migrated to a new user experience at www.ti.com/tool/download/SNVR496. Please update any bookmarks accordingly.

Supported products & hardware

AC/DC & DC/DC controllers (external FET)
LM25149 — 42-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM25149-Q1 — 42-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149 — 80-V synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter LM5149-Q1 — 80-V automotive synchronous buck DC/DC controller with ultra-low IQ and integrated active EMI filter
Evaluation board
LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

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