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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM25575

現行

6V 至 42V、1.5A 降壓 DC/DC 切換穩壓器

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產品規格表

LM25575

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 42 Vin (min) (V) 6 Vout (max) (V) 40 Vout (min) (V) 1.23 Features Frequency synchronization, Overcurrent protection Control mode current mode Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1000 Duty cycle (max) (%) 95 Type Converter
Rating Catalog Topology Buck Iout (max) (A) 1.5 Vin (max) (V) 42 Vin (min) (V) 6 Vout (max) (V) 40 Vout (min) (V) 1.23 Features Frequency synchronization, Overcurrent protection Control mode current mode Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 1000 Operating temperature range (°C) -40 to 125 Iq (typ) (µA) 1000 Duty cycle (max) (%) 95 Type Converter
HTSSOP (PWP) 16 32 mm² 5 x 6.4
  • Integrated 42-V, 330-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-16EP (Exposed Pad)
  • Create a Custom Design Using the LM25575 With the WEBENCH® Power Designer
  • Integrated 42-V, 330-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-16EP (Exposed Pad)
  • Create a Custom Design Using the LM25575 With the WEBENCH® Power Designer

The LM25575 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 LM25575 delivers 1.5-A of continuous output current with an integrated 330-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 LM25575 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-16 package featuring an exposed die attach pad for thermal dissipation. The LM25575 is supported by the full suite of WEBENCH® On-Line design tools.

The LM25575 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 LM25575 delivers 1.5-A of continuous output current with an integrated 330-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 LM25575 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-16 package featuring an exposed die attach pad for thermal dissipation. The LM25575 is supported by the full suite of WEBENCH® On-Line design tools.
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類型 標題 日期
* Data sheet LM25575 42-V, 1.5-A Step-Down Switching Regulator datasheet (Rev. H) PDF | HTML 2017年 8月 24日
Application note Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024年 3月 25日
White paper Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018年 7月 3日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Technical article Quantifying the value of wide VIN PDF | HTML 2016年 6月 15日
Technical article DC/DC converter datasheets – System losses demystified PDF | HTML 2016年 4月 25日
Technical article DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016年 4月 18日
Application note Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014年 9月 12日
Application note AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 2013年 5月 6日
Application note AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013年 4月 24日
Application note AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013年 4月 23日
Application note AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013年 4月 23日
Application note AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013年 4月 23日
Application note AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013年 4月 23日
Application note AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013年 4月 23日
Application note AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013年 4月 23日
Application note AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013年 4月 23日
Application note AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013年 4月 23日
Application note Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575 (Rev. B) 2013年 4月 23日
Application note Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) 2013年 4月 23日
Application note Understanding and Applying Current-Mode Control Theory 2007年 8月 19日
Application note Input and Output Capacitor Selection 2005年 9月 19日
More literature SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005年 7月 12日
Application note AN-643 EMI/RFI Board Design (Rev. B) 2004年 5月 3日

設計與開發

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開發板

LM25575EVAL — LM25575 42V 1.5A 降壓穩壓器評估板

The LM25575 evaluation board is designed to provide the design engineer with a fully functional power converter based on Emulated Current Mode Control to evaluate the LM25575 regulator IC. The evaluation board provides a 5V output with a 1.5A current capability. The ultra-wide input voltage ranges (...)

使用指南: PDF
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模擬型號

LM25575 Non-Inverting and Inverting PSpice Transient Model (Rev. A)

SNVM154A.ZIP (124 KB) - PSpice Model
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模擬型號

LM25575 Non-Inverting and Inverting Unencrypted PSpice Transient Model (Rev. A)

SNVM870A.ZIP (4 KB) - PSpice Model
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模擬型號

LM25575 PSpice Average Model

SNVM153.ZIP (57 KB) - PSpice Model
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模擬型號

LM25575 Unencrypted PSpice Average Model

SNVM867.ZIP (2 KB) - PSpice Model
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計算工具

LM2557X-557XQUICK-CALC — LM(2)557x 快速入門 SIMPLE SWITCHER 元件計算機

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計算工具

SIMPLESWITCHER-COMPONENT-CALC — 可下載的 LM(2)557x 快速入門 SIMPLE SWITCHER 元件計算機

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HTSSOP (PWP) 16 Ultra Librarian
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