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

5 修订历史记录

Changes from D Revision (October 2014) to E Revision

Changes from C Revision (April 2011) to D Revision

  • 添加了器件信息表，处理额定值表，建议运行条件表和热性能信息表Go
  • Changed the Absolute Maximum Ratings for BOOT-PH, MAX value From: 7 V To: 7.7 V Go
  • Changed Equation 28 From: C7(nF) To: C5(nF)Go

Changes from B Revision (October 2010) to C Revision

  • Changed From separate RHL and RGY packages To a combined RHL and RGY packageGo

Changes from A Revision (January 2010) to B Revision

  • Changed Small Signal Model for Frequency Compensation sectionGo

Changes from * Revision (May 2009) to A Revision

  • Changed 标题，从带有集成 FET (SWIFT) 的 17V 输入、6A 输出同步降压转换器更改为现有标题Go
  • Changed PowerPAD to Exposed Thermal PadGo
  • Changed Changed the Absolute Maximum Ratings for EN, MAX value From: 3 V To: 6 VGo
  • Changed minimum switching frequency min value from 180 to 160Go
  • Changed minimum switching frequency max value from 220 to 240Go
  • Added "Type 3" block around C11Go
  • Changed PCB Layout graphicGo