ZHCSLW5A October   2019  – November 2020 LMR50410-Q1

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 System Characteristics
    9. 7.9 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Fixed Frequency Peak Current Mode Control
      2. 8.3.2 Adjustable Output Voltage
      3. 8.3.3 Enable
      4. 8.3.4 Minimum ON-Time, Minimum OFF-Time, and Frequency Foldback
      5. 8.3.5 Bootstrap Voltage
      6. 8.3.6 Overcurrent and Short Circuit Protection
      7. 8.3.7 Soft Start
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
      3. 8.4.3 CCM Mode
      4. 8.4.4 Light-Load Operation (PFM Version)
      5. 8.4.5 Light-Load Operation (FPWM Version)
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Output Voltage Set-Point
        3. 9.2.2.3 Switching Frequency
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Output Capacitor Selection
        6. 9.2.2.6 Input Capacitor Selection
        7. 9.2.2.7 Bootstrap Capacitor
        8. 9.2.2.8 Undervoltage Lockout Set-Point
        9. 9.2.2.9 Maximum Ambient Temperature
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Compact Layout for EMI Reduction
      2. 11.1.2 Feedback Resistors
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 静电放电警告
    7. 12.7 术语表
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

说明

LMR50410-Q1 是一款简单易用的宽输入电压同步降压转换器,能够驱动高达 1A 的负载电流。该器件具有 4V 至 36V 的宽输入范围,适用于从非稳压源进行电源调节的各种汽车应用。

LMR50410-Q1 以 2.1MHz 的开关频率运行,支持使用相对较小的电感器,从而实现经优化的解决方案尺寸。它具有可在轻负载时实现高效率的 PFM 版本和实现恒定频率的 FPWM 版本,并可在整个负载范围内实现低输出电压纹波。在内部实现了软启动和补偿电路,从而更大限度地减少了器件所用的外部元件。

该器件具有内置的保护功能,例如逐周期电流限制、断续模式短路保护以及功耗过大的情况下的热关断功能。LMR50410-Q1 采用 SOT-23-6 封装。

器件信息
器件型号 封装(1) 封装尺寸(标称值)
LMR50410-Q1 SOT-23-6 2.90mm × 1.60mm
如需了解所有可用封装,请参阅数据表末尾的可订购米6体育平台手机版_好二三四附录。
GUID-273ECA58-C5EB-4463-90BB-C380BFCBC05A-low.gif简化版原理图
GUID-20201027-CA0I-J6JZ-FB1B-474ZMXVQNJZM-low.gif效率与输出电流间的关系 VOUT = 5V,2.1MHz