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LM25576-Q1

AKTIV

Abwärtsschaltregler, 42 V, 3 A

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Datenblatt

LM25576-Q1

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Rating Automotive Iout (max) (A) 3 Vin (max) (V) 42 Vin (min) (V) 6 Vout (max) (V) 40 Vout (min) (V) 1.23 Features 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 Iout (max) (A) 3 Vin (max) (V) 42 Vin (min) (V) 6 Vout (max) (V) 40 Vout (min) (V) 1.23 Features 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)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
  • Integrated 42V, 170mΩ N-channel MOSFET
  • Ultra-wide input voltage range from 6V to 42V
  • Adjustable output voltage as low as 1.225V
  • 1.5% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 1MHz with single resistor
  • Controller or peripheral 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 42V, 170mΩ N-channel MOSFET
  • Ultra-wide input voltage range from 6V to 42V
  • Adjustable output voltage as low as 1.225V
  • 1.5% feedback reference accuracy
  • Operating frequency adjustable between 50kHz and 1MHz with single resistor
  • Controller or peripheral 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 users to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6V to 42V, the LM25576-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 1MHz 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 LM25576-Q1 establishes robustness with a 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 users to design and optimize a robust power supply using a minimum set of components. Operating with an input voltage range of 6V to 42V, the LM25576-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 1MHz 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 LM25576-Q1 establishes robustness with a 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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Technische Dokumentation

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Top-Dokumentation Typ Titel Format-Optionen Neueste englische Version herunterladen Datum
* Datenblatt LM25576-Q1 42V, 3A Step-Down Switching Regulator datasheet (Rev. A) PDF | HTML 09.12.2025
Anwendungshinweis Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 25.03.2024
Whitepaper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 03.07.2018
Anwendungshinweis Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 12.09.2014
Anwendungshinweis AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 06.05.2013
Anwendungshinweis AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 24.04.2013
Anwendungshinweis AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 23.04.2013
Anwendungshinweis AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 23.04.2013
Anwendungshinweis AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 23.04.2013
Anwendungshinweis AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 23.04.2013
Anwendungshinweis AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 23.04.2013
Anwendungshinweis Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) 23.04.2013
Anwendungshinweis AN-1197 Selecting Inductors for Buck Converters (Rev. B) 23.04.2013
Anwendungshinweis AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 23.04.2013
Anwendungshinweis AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 23.04.2013
Benutzerhandbuch LM25576 Reference Design 6-42V input, 5V 3A output User Guide 27.01.2012
Weitere Dokumente LM25576 Reference Design 6-42V input, 5V 3A output Files 25.01.2012
Anwendungshinweis Understanding and Applying Current-Mode Control Theory 19.08.2007
Anwendungshinweis Input and Output Capacitor Selection 19.09.2005
Weitere Dokumente SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 12.07.2005
Anwendungshinweis AN-643 EMI/RFI Board Design (Rev. B) 03.05.2004

Design und Entwicklung

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Simulationsmodell

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

SNVM306A.ZIP (123 KB) - PSpice-Modell
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Simulationsmodell

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

SNVM872A.ZIP (4 KB) - PSpice-Modell
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Simulationsmodell

LM25576 PSpice Average Model

SNVM305.ZIP (57 KB) - PSpice-Modell
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Simulationsmodell

LM25576 Unencrypted PSpice Average Model

SNVM871.ZIP (2 KB) - PSpice-Modell
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Berechnungstool

LM2557X-557XQUICK-CALC — Lm(2)557x Quick Start SIMPLE SWITCHER Komponentenrechner

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Berechnungstool

SIMPLESWITCHER-COMPONENT-CALC — Herunterladbarer LM(2)557x Quick Start SIMPLE SWITCHER-Komponentenrechner

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Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
HTSSOP (PWP) 20 Ultra Librarian
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