ZHCSIM4H April   2009  – November 2014 LM25011 , LM25011-Q1

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
    1.     典型应用
  4. 修订历史记录
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings: LM25011
    3. 6.3 Handling Ratings: LM25011-Q1
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Thermal Information
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Control Circuit Overview
      2. 7.3.2 On-Time Timer
      3. 7.3.3 Current Limit
      4. 7.3.4 Ripple Requirements
      5. 7.3.5 N-Channel Buck Switch and Driver
      6. 7.3.6 Soft-Start
      7. 7.3.7 Power Good Output (PGD)
      8. 7.3.8 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Function
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 LM25011 Example Circuit
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Custom Design with WEBENCH Tools
          2. 8.2.1.2.2 External Components
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Output Ripple Control
        1. 8.2.2.1 Option A: Lowest Cost Configuration
        2. 8.2.2.2 Option B: Intermediate VOUT Ripple Configuration
        3. 8.2.2.3 Option C: Minimum VOUT Ripple Configuration
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Power Dissipation
  11. 11器件和文档支持
    1. 11.1 使用 WEBENCH 工具创建定制设计
    2. 11.2 接收文档更新通知
    3. 11.3 相关链接
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12机械、封装和可订购信息

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

Typical Characteristics

LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094603.pngFigure 1. Efficiency (Circuit of Figure 19)
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094605.pngFigure 3. On-Time vs VIN and RT
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094607.pngFigure 5. Shutdown Current into VIN
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094609.pngFigure 7. PGD Low Voltage vs Sink Current
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094611.pngFigure 9. Current Limit Threshold vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094613.pngFigure 11. VIN UVLO vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094615.pngFigure 13. On-Time vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094604.pngFigure 2. Efficiency at 2 MHz
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094606.pngFigure 4. Voltage at the RT Pin
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094608.pngFigure 6. Operating Current into VIN
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094610.pngFigure 8. Reference Voltage vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094612.pngFigure 10. Operating Current vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094614.pngFigure 12. SS Pin Shutdown Threshold vs Temperature
LM25011 LM25011-Q1 LM25011A LM25011A-Q1 30094651.gifFigure 14. Minimum Off-Time vs Temperature