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LM5148-LM25148DESIGN-CALC

LM5148 and LM25148 controller quickstart design tool

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LM5148-LM25148DESIGN-CALC

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Overview

Welcome to the quickstart design tool for the LM5148, LM5148-Q1, LM25148 and LM25148-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

LM5148-LM25148DESIGN-CALC — LM5148/-Q1 and LM25148/-Q1 controller quickstart design tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM25148 — 42-V synchronous buck DC/DC controller with ultra-low IQ LM25148-Q1 — Automotive 42-V synchronous buck DC/DC controller with ultra-low IQ LM5148 — 3.5-V to 80-V, current mode synchronous buck controller LM5148-Q1 — Automotive, 80V synchronous buck DC/DC controller with ultra-low IQ
Hardware development
Evaluation board
LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module LM5149-Q1EVM-400 — LM5149-Q1 evaluation module, 72-V, low-IQ, synchronous buck DC/DC controller with active EMI filter
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LM5148-LM25148DESIGN-CALC — LM5148/-Q1 and LM25148/-Q1 controller quickstart design tool

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Latest version
Version: A4
Release date: Sep 19, 2024
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LM5148_LM25148_quickstart_calculator_A4.xlsm  — 3666 K

LM(2)5148/-Q1 quickstart calculator

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Products
AC/DC & DC/DC controllers (external FET)
LM25148 — 42-V synchronous buck DC/DC controller with ultra-low IQ LM25148-Q1 — Automotive 42-V synchronous buck DC/DC controller with ultra-low IQ LM5148 — 3.5-V to 80-V, current mode synchronous buck controller LM5148-Q1 — Automotive, 80V synchronous buck DC/DC controller with ultra-low IQ
Hardware development
Evaluation board
LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module LM5149-Q1EVM-400 — LM5149-Q1 evaluation module, 72-V, low-IQ, synchronous buck DC/DC controller with active EMI filter

Release Information

Welcome to the quickstart design calculator tool for the LM5148, LM5148-Q1, LM25148 and LM25148-Q1. This standalone tool facilitates and assists the power supply engineer with the design of a DC/DC buck regulator based on the LM(2)5148/-Q1 controller family. As such, the user can expeditiously arrive at an optimized design to meet the application requirements.

Related design resources

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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