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DC/DC 切換穩壓器
DC/DC 轉換器

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 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
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 Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.001 Duty cycle (max) (%) 95
HTSSOP (PWP) 16 32 mm² (5 mm × 6.4 mm)
  • Integrated 42V, 330mΩ 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-16EP (exposed pad)
  • Create a custom design using the LM25575 with the WEBENCH Power Designer
  • Integrated 42V, 330mΩ 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-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 6V to 42V, the LM25575 delivers 1.5A of continuous output current with an integrated 330mΩ 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 LM25575 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 HTSSOP-16 package featuring an exposed die attach pad for thermal dissipation. The LM25575 is supported by the full suite of WEBENCH circuit design and selection simulation services online 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 6V to 42V, the LM25575 delivers 1.5A of continuous output current with an integrated 330mΩ 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 LM25575 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 HTSSOP-16 package featuring an exposed die attach pad for thermal dissipation. The LM25575 is supported by the full suite of WEBENCH circuit design and selection simulation services online design tools.
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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM25575 42V, 1.5A Step-Down Switching Regulator datasheet (Rev. I) PDF | HTML 2026/4/22
應用說明 Semiconductor and IC Package Thermal Metrics (Rev. D) PDF | HTML 2024/3/25
白皮書 Overcoming Challenges in Designing Step-Dwn Reg Apps w/40V Input Voltage (Rev. A) 2018/7/3
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
技術文章 Quantifying the value of wide VIN PDF | HTML 2016/6/15
技術文章 DC/DC converter datasheets – System losses demystified PDF | HTML 2016/4/25
技術文章 DC/DC converter datasheets – System efficiency demystified PDF | HTML 2016/4/18
應用說明 Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) 2014/9/12
應用說明 AN-1997 Error Amplifier Limitations in High-Performance Regulator Applications (Rev. A) 2013/5/6
應用說明 AN-2162 Simple Success With Conducted EMI From DC-DC Converters (Rev. C) 2013/4/24
應用說明 AN-1566 Techniques for Thermal Analysis of Switching Power Supply Designs (Rev. A) 2013/4/23
應用說明 AN-2155 Layout Tips for EMI Reduction in DC/ DC Converters (Rev. A) 2013/4/23
應用說明 AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) 2013/4/23
應用說明 AN-1149 Layout Guidelines for Switching Power Supplies (Rev. C) 2013/4/23
應用說明 AN-1889 How to Measure the Loop Transfer Function of Power Supplies (Rev. A) 2013/4/23
應用說明 Quick Start Guide for a 3 Amp Buck Regulator Using the LM5576 and LM25576 (Rev. B) 2013/4/23
應用說明 Quick Start Guide for a 1.5 Amp Buck Regulator Using the LM5575 and LM25575 (Rev. B) 2013/4/23
應用說明 AN-1197 Selecting Inductors for Buck Converters (Rev. B) 2013/4/23
應用說明 AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) 2013/4/23
應用說明 AN-1520 A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (Rev. B) 2013/4/23
應用說明 Understanding and Applying Current-Mode Control Theory 2007/8/19
應用說明 Input and Output Capacitor Selection 2005/9/19
更多文件說明 SEM1600 Topic 4: Constructing Your Power Supply – Layout Considerations 2005/7/12
應用說明 AN-643 EMI/RFI Board Design (Rev. B) 2004/5/3

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 模型
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模擬型號

LM25575 PSpice Average Model

SNVM153.ZIP (57 KB) - PSpice 模型
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模擬型號

LM25575 Unencrypted PSpice Average Model

SNVM867.ZIP (2 KB) - PSpice 模型
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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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封裝 針腳 CAD 符號、佔位空間與 3D 模型
HTSSOP (PWP) 16 Ultra Librarian
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