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LM5146DESIGN-CALC

LM5146/-Q1 synchronous buck controller quickstart design tool

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LM5146DESIGN-CALC

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Overview

Welcome to the LM5146/-Q1 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 LM5146/-Q1 100V 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 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

LM5146DESIGN-CALC — LM5146/-Q1 100V synchronous buck controller quickstart calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM5146 — 100-V synchronous buck DC/DC controller with wide duty-cycle range LM5146-Q1 — Automotive 100-V synchronous buck DC/DC controller with wide duty-cycle range
Hardware development
Reference design
PMP30916 — -8V Inverting Buck-boost Reference Design
Evaluation board
LM5146-Q1-EVM12V — Synchronous buck controller evaluation module
Download options

LM5146DESIGN-CALC — LM5146/-Q1 100V synchronous buck controller quickstart calculator

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Latest version
Version: B1
Release date: Mar 21, 2025
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LM5146_quickstart_calculator_revB1.xlsm  — 3247 K

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Products
AC/DC & DC/DC controllers (external FET)
LM5146 — 100-V synchronous buck DC/DC controller with wide duty-cycle range LM5146-Q1 — Automotive 100-V synchronous buck DC/DC controller with wide duty-cycle range
Hardware development
Reference design
PMP30916 — -8V Inverting Buck-boost Reference Design
Evaluation board
LM5146-Q1-EVM12V — Synchronous buck controller evaluation module

Release Information

Welcome to the LM5146/-Q1 100V synchronous buck controller quickstart calculator.

Technical documentation

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Type Title Date
EVM User's guide LM5146-Q1EVM User's Guide Aug 10, 2018

Related design resources

Hardware development

EVALUATION BOARD
LM5146-Q1-EVM12V — Synchronous buck controller evaluation module

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