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Product details

Parameters

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Package | Pins | Size

HTSSOP (PWP) 20 42 mm² 6.5 x 6.4 open-in-new Find other Buck converters (integrated switch)

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Integrated 42-V, 170-mΩ N-channel MOSFET
  • Ultra-Wide Input Voltage Range from 6 V to 42 V
  • Adjustable Output Voltage as Low as 1.225 V
  • 1.5% Feedback Reference Accuracy
  • Operating Frequency Adjustable Between 50 kHz and 1 MHz with Single Resistor
  • Master or Slave Frequency Synchronization
  • Adjustable Soft-Start
  • Emulated Current Mode Control Architecture
  • Wide Bandwidth Error Amplifier
  • Built-in Protection
  • HTSSOP-20 EP (Exposed Pad)
  • Create a Custom Design Using the LM25576-Q1 With the WEBENCH® Power Designer

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Description

The LM25576-Q1 is an easy to use buck regulator which allows design engineers to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6 V to 42 V, the LM25576-Q1 delivers 3 A of continuous output current with an integrated 170-mΩ N-Channel MOSFET. The regulator utilizes an Emulated Current Mode architecture which provides inherent line regulation, tight load transient response, and ease of loop compensation without the usual limitation of low-duty cycles associated with current mode regulators. The operating frequency is adjustable from 50 kHz to 1 MHz to allow optimization of size and efficiency. To reduce EMI, a frequency synchronization pin allows multiple IC’s from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM25576-Q1 ensures robustness with cycle-by-cycle current limit, short-circuit protection, thermal shut-down, and remote shut-down. The device is available in a power enhanced HTSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM25576-Q1 is supported by the full suite of WEBENCH® On-Line design tools.

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LMR33630-Q1 ACTIVE 3.8-V to 36-V, 3-A synchronous step-down voltage converter Next-generation 3.8-V to 36-V, 3-A synchronous buck converter with ultra-low EMI.

Technical documentation

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Type Title Date
* Datasheet LM25576-Q1 42-V, 3-A Step-Down Switching Regulator datasheet Dec. 21, 2017
Technical articles Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) Jul. 03, 2018
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) Apr. 19, 2016
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) Sep. 12, 2014
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) May 06, 2013
User guide AN-1579 LM25576 Evaluation Board (Rev. C) Apr. 24, 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) Apr. 24, 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) Apr. 23, 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) Apr. 23, 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) Apr. 23, 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) Apr. 23, 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) Apr. 23, 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) Apr. 23, 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) Apr. 23, 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) Apr. 23, 2013
Application note Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) Apr. 23, 2013
User guide LM25576 Reference Design 6-42V input, 5V 3A output User Guide Jan. 27, 2012
More literature LM25576 Reference Design 6-42V input, 5V 3A output Files Jan. 25, 2012
Application note Understanding and Applying Current-Mode Control Theory Aug. 19, 2007
Application note Input and Output Capacitor Selection Sep. 19, 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations Jul. 12, 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) May 03, 2004

Design & development

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Design tools & simulation

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PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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CALCULATION TOOL Download
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HTSSOP (PWP) 20 View options

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