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LM5576-Q1

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Regulador de conmutación reductor de 75 V y 3 A

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LM5576-Q1

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Detalles del producto

Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 75 Vin (min) (V) 6 Vout (max) (V) 70 Vout (min) (V) 1.23 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
Rating Automotive Topology Buck Iout (max) (A) 3 Vin (max) (V) 75 Vin (min) (V) 6 Vout (max) (V) 70 Vout (min) (V) 1.23 Features Enable, Frequency synchronization, Over Current Protection, Soft Start Adjustable Control mode current mode Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
HTSSOP (PWP) 20 41.6 mm² (6.5 mm × 6.4 mm)
  • LM5576-Q1 is an automotive grade product that is AEC-Q100 grade 1 qualified (−40°C to + 125°C operating junction temperature)
  • Ultra-wide input voltage range from 6V to 75V
  • Integrated 75V, 170mΩ N-channel MOSFET
  • Adjustable output voltage as low as 1.225V
  • 1.5% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 500kHz with single resistor
  • Controller or peripheral frequency synchronization
  • Adjustable soft start
  • Emulated current mode control architecture
  • Wide bandwidth error amplifier
  • Built-in protection
  • HTSSOP-20EP (exposed pad)
  • Create a custom design using the LM5576-Q1 device with the WEBENCH Power Designer
  • LM5576-Q1 is an automotive grade product that is AEC-Q100 grade 1 qualified (−40°C to + 125°C operating junction temperature)
  • Ultra-wide input voltage range from 6V to 75V
  • Integrated 75V, 170mΩ N-channel MOSFET
  • Adjustable output voltage as low as 1.225V
  • 1.5% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 500kHz with single resistor
  • Controller or peripheral frequency synchronization
  • Adjustable soft start
  • Emulated current mode control architecture
  • Wide bandwidth error amplifier
  • Built-in protection
  • HTSSOP-20EP (exposed pad)
  • Create a custom design using the LM5576-Q1 device with the WEBENCH Power Designer

The LM5576-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 6V to 75V, the LM5576-Q1 delivers 3A of continuous output current with an integrated 170mΩ N-Channel MOSFET. The regulator uses 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 ICs from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5576-Q1 makes sure of robustness with cycle-by-cycle current limit, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power-enhanced, 20-pin HTSSOP package that features an exposed die attach pad for thermal dissipation. The LM5576-Q1 is supported by the full suite of WEBENCH online design tools.

The LM5576-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 6V to 75V, the LM5576-Q1 delivers 3A of continuous output current with an integrated 170mΩ N-Channel MOSFET. The regulator uses 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 ICs from the LM(2)557x family to self-synchronize or to synchronize to an external clock. The LM5576-Q1 makes sure of robustness with cycle-by-cycle current limit, short-circuit protection, thermal shutdown, and remote shutdown. The device is available in a power-enhanced, 20-pin HTSSOP package that features an exposed die attach pad for thermal dissipation. The LM5576-Q1 is supported by the full suite of WEBENCH online design tools.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LM5576-Q1 75V, 3A, Step-Down Switching Regulator datasheet (Rev. C) PDF | HTML 5/11/2025
Nota sobre la aplicación Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25/03/2024
Informe Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 3/07/2018
Nota sobre la aplicación Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12/09/2014
Nota sobre la aplicación AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 6/05/2013
Nota sobre la aplicación AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24/04/2013
Nota sobre la aplicación AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23/04/2013
Nota sobre la aplicación AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23/04/2013
Nota sobre la aplicación AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23/04/2013
Nota sobre la aplicación Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) 23/04/2013
Nota sobre la aplicación AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23/04/2013
Nota sobre la aplicación AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23/04/2013
Nota sobre la aplicación AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23/04/2013
Nota sobre la aplicación Understanding and Applying Current-Mode Control Theory 19/08/2007
Nota sobre la aplicación Input and Output Capacitor Selection 19/09/2005
Más documentación SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12/07/2005
Nota sobre la aplicación AN-643 EMI/RFI Board Design (Rev. B) 3/05/2004

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

LM5576EVAL — Módulo de evaluación de regulador reductor de conmutación de 75 V y 3 A

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 (...)

Guía del usuario: PDF
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Modelo de simulación

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

SNVM292C.ZIP (1168 KB) - Modelo PSpice
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Modelo de simulación

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

SNVM548A.TSC (566 KB) - Diseño de referencia TINA-TI
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Modelo de simulación

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

SNVM549A.ZIP (10 KB) - Modelo TINA-TI Spice
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Modelo de simulación

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

SNVM547A.TSC (661 KB) - Diseño de referencia TINA-TI
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Herramienta de cálculo

LM2557X-557XQUICK-CALC — Calculadora de componentes con inicio rápido SIMPLE SWITCHER LM(2)557x

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Herramienta de cálculo

SIMPLESWITCHER-COMPONENT-CALC — Calculadora de componentes de inicio rápido SIMPLE SWITCHER LM(2)557x descargable

Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
HTSSOP (PWP) 20 Ultra Librarian
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