ZHCS004E May   2009  – July 2016

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 LP38690 的
  5. 5 修订历史记录
  6. 6 Pin Configurations and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed Frequency PWM Control
      2. 8.3.2  Continuous Current Mode Operation (CCM)
      3. 8.3.3  VIN and Power VIN Pins (VIN and PVIN)
      4. 8.3.4  Voltage Reference
      5. 8.3.5  Adjusting the Output Voltage
      6. 8.3.6  Safe Start-up into Pre-Biased Outputs
      7. 8.3.7  Error Amplifier
      8. 8.3.8  Slope Compensation
      9. 8.3.9  Enable and Adjusting Under-Voltage Lockout
      10. 8.3.10 Adjustable Switching Frequency and Synchronization (RT/CLK)
      11. 8.3.11 Slow Start (SS/TR)
      12. 8.3.12 Power Good (PWRGD)
      13. 8.3.13 Output Overvoltage Protection (OVP)
      14. 8.3.14 Overcurrent Protection
      15. 8.3.15 Thermal Shutdown
      16. 8.3.16 Small Signal Model for Loop Response
      17. 8.3.17 Simple Small Signal Model for Peak Current Mode Control
      18. 8.3.18 Small Signal Model for Frequency Compensation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Adjustable Switching Frequency (RT Mode)
      2. 8.4.2 Synchronization (CLK Mode)
      3. 8.4.3 Bootstrap Voltage (BOOT) and Low Dropout Operation
      4. 8.4.4 Sequencing (SS/TR)
  9. 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 Procedures
        1. 9.2.2.1  Operating Frequency
        2. 9.2.2.2  Output Inductor Selection
        3. 9.2.2.3  Output Capacitor Selection
        4. 9.2.2.4  Input Capacitor Selection
        5. 9.2.2.5  Slow Start Capacitor Selection
        6. 9.2.2.6  Bootstrap Capacitor Selection
        7. 9.2.2.7  Under Voltage Lockout Set Point
        8. 9.2.2.8  Output Voltage Feedback Resistor Selection
          1. 9.2.2.8.1 Minimum Output Voltage
        9. 9.2.2.9  Compensation Component Selection
        10. 9.2.2.10 Fast Transient Considerations
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Estimated Circuit Area
    4. 11.4 Thermal Consideration
  12. 12器件和文档支持
    1. 12.1 接收文档更新通知
    2. 12.2 社区资源
    3. 12.3 商标
    4. 12.4 静电放电警告
    5. 12.5 Glossary
  13. 13机械、封装和可订购信息

13 机械、封装和可订购信息

以下页中包括机械封装和可订购信息。这些信息是针对指定器件可提供的最新数据。这些数据会在无通知且不对本文档进行修订的情况下发生改变。要获得这份数据表的浏览器版本，请查阅左侧的导航栏。