Product details

Vin (Min) (V) 6 Vin (Max) (V) 75 Vout (Min) (V) 1.23 Vout (Max) (V) 70 Iout (Max) (A) 3 Iq (Typ) (uA) 1000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 500 Features Enable, 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) 75 Vout (Min) (V) 1.23 Vout (Max) (V) 70 Iout (Max) (A) 3 Iq (Typ) (uA) 1000 Switching frequency (Min) (kHz) 50 Switching frequency (Max) (kHz) 500 Features Enable, 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
  • LM5576Q0 is an Automotive Grade Product
    that is AEC-Q100 Grade 0 Qualified
  • –40°C to 150°C Operating Junction Temperature
  • Integrated 75V, 170mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range from 6V to 75V
  • Adjustable Output Voltage as Low as 1.225V
  • 1.65% Feedback Reference Accuracy
  • Operating Frequency Adjustable Between 50kHz and
    500kHz with Single Resistor
  • Master or Slave Frequency Synchronization
  • Adjustable Soft-Start
  • Emulated Current Mode Control Architecture
  • Wide Bandwidth Error Amplifier
  • Built-In Protection
  • LM5576Q0 is an Automotive Grade Product
    that is AEC-Q100 Grade 0 Qualified
  • –40°C to 150°C Operating Junction Temperature
  • Integrated 75V, 170mΩ N-Channel MOSFET
  • Ultra-Wide Input Voltage Range from 6V to 75V
  • Adjustable Output Voltage as Low as 1.225V
  • 1.65% Feedback Reference Accuracy
  • Operating Frequency Adjustable Between 50kHz and
    500kHz with Single Resistor
  • Master or Slave Frequency Synchronization
  • Adjustable Soft-Start
  • Emulated Current Mode Control Architecture
  • Wide Bandwidth Error Amplifier
  • Built-In Protection

The LM5576Q0 is an easy to use SIMPLE SWITCHER 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 – 75V, the LM5576Q0 delivers 3A of continuous output current with an integrated 170mΩ 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 50kHz to 500kHz 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 LM5576Q0 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 TSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM5576Q0 is supported by the full suite of WEBENCH On-Line design tools.

The LM5576Q0 is an easy to use SIMPLE SWITCHER 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 – 75V, the LM5576Q0 delivers 3A of continuous output current with an integrated 170mΩ 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 50kHz to 500kHz 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 LM5576Q0 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 TSSOP-20 package featuring an exposed die attach pad for thermal dissipation. The LM5576Q0 is supported by the full suite of WEBENCH On-Line design tools.

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Technical documentation

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Type Title Date
* Data sheet LM5576/-Q1 SIMPLE SWITCHER® 6V to 75V, 3A Wide Vin Step-Down Regulator datasheet (Rev. B) 04 May 2013
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
EVM User's guide AN-1570 LM5576 Evaluation Board (Rev. B) 26 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
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.

Evaluation board

LM5576EVAL — 75V, 3A Step-Down Switching Regulator Evaluation Module

The LM5576 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM5576 regulator IC. The evaluation board provides a 5V output with a 3A current capability. The ultra-wide input voltage ranges from (...)

Simulation model

LM5576 Non-Inverting and Inverting PSpice Transient Model (Rev. C)

SNVM292C.ZIP (1168 KB) - PSpice Model
Simulation model

LM5576 TINA-TI Transient Start-up Reference Design (Rev. A)

SNVM547A.TSC (661 KB) - TINA-TI Reference Design
Simulation model

LM5576 TINA-TI Transient Load Transient Reference Design (Rev. A)

SNVM548A.TSC (566 KB) - TINA-TI Reference Design
Simulation model

LM5576 TINA-TI Transient Spice Model (Rev. A)

SNVM549A.ZIP (10 KB) - TINA-TI Spice 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

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HTSSOP (PWP) 20 View options

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