Product details

Vin (Min) (V) 6 Vin (Max) (V) 42 Vout (Min) (V) 1.23 Vout (Max) (V) 40 Iout (Max) (A) 3 Iq (Typ) (uA) 1000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Features Frequency Synchronization, Over Current Protection, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1
Vin (Min) (V) 6 Vin (Max) (V) 42 Vout (Min) (V) 1.23 Vout (Max) (V) 40 Iout (Max) (A) 3 Iq (Typ) (uA) 1000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 1000 Features Frequency Synchronization, Over Current Protection, Soft Start Adjustable Operating temperature range (C) -40 to 125 Rating Automotive Regulated outputs (#) 1
HTSSOP (PWP) 20 42 mm² 6.5 x 6.4
  • 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
  • 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

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.

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.

Download

Similar products you might be interested in

open-in-new Compare products
Same functionality with different pin-out to the compared device.
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

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 23
Type Title Date
* Data sheet LM25576-Q1 42-V, 3-A Step-Down Switching Regulator datasheet 21 Dec 2017
Technical article Minimize the impact of the MLCC shortage on your power application 29 Mar 2019
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 03 Jul 2018
Application note Semiconductor and IC Package Thermal Metrics (Rev. C) 19 Apr 2016
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12 Sep 2014
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 06 May 2013
User guide AN-1579 LM25576 Evaluation Board (Rev. C) 24 Apr 2013
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24 Apr 2013
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23 Apr 2013
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23 Apr 2013
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23 Apr 2013
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23 Apr 2013
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23 Apr 2013
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23 Apr 2013
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23 Apr 2013
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23 Apr 2013
Application note Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) 23 Apr 2013
User guide LM25576 Reference Design 6-42V input, 5V 3A output User Guide 27 Jan 2012
More literature LM25576 Reference Design 6-42V input, 5V 3A output Files 25 Jan 2012
Application note Understanding and Applying Current-Mode Control Theory 19 Aug 2007
Application note Input and Output Capacitor Selection 19 Sep 2005
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12 Jul 2005
Application note AN-643 EMI/RFI Board Design (Rev. B) 03 May 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Simulation model

LM25576 PSpice Average Model

SNVM305.ZIP (57 KB) - PSpice Model
Simulation model

LM25576 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM306A.ZIP (123 KB) - PSpice Model
Simulation model

LM25576 Unencrypted PSpice Average Model

SNVM871.ZIP (2 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Calculation tool

LM2557X-557XQUICK-CALC — LM(2)557x Quick Start SIMPLE SWITCHER Component Calculator

Calculation tool

SIMPLESWITCHER-COMPONENT-CALC — Downloadable LM(2)557x Quick Start SIMPLE SWITCHER Component Calculator

Package Pins Download
HTSSOP (PWP) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos