LM5148-LM25148DESIGN-CALC

LM5148 and LM25148 controller quickstart design tool

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

Products

AC/DC & DC/DC controllers (external FET)

LM5148 — 3.5-V to 80-V, current mode synchronous buck controller

LM5148-Q1 — Automotive, 80V synchronous buck DC/DC controller with ultra-low I_Q

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

Hardware development

Evaluation board

LM5149-Q1EVM-400 — LM5149-Q1 evaluation module, 72-V, low-IQ, synchronous buck DC/DC controller with active EMI filter

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

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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: 19 Sep 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)

LM5148 — 3.5-V to 80-V, current mode synchronous buck controller

LM5148-Q1 — Automotive, 80V synchronous buck DC/DC controller with ultra-low I_Q

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

Hardware development

Evaluation board

LM5149-Q1EVM-400 — LM5149-Q1 evaluation module, 72-V, low-IQ, synchronous buck DC/DC controller with active EMI filter

LM25149-Q1EVM-2100 — LM25149-Q1 5.5-V to 36-V, low IQ, synchronous buck DC/DC controller evaluation module

LM5148-LM25148DESIGN-CALC

LM5148 and LM25148 controller quickstart design tool