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

12 器件和文档支持

12.1 接收文档更新通知

如需接收文档更新通知，请访问 www.ti.com.cn 网站上的器件产品文件夹。点击右上角的提醒我 (Alert me) 注册后，即可每周定期收到已更改的产品信息。有关更改的详细信息，请查阅已修订文档中包含的修订历史记录。

12.2 社区资源

The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use.

    TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers.
    Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support.

12.3 商标

E2E is a trademark of Texas Instruments.

All other trademarks are the property of their respective owners.

12.4 静电放电警告

esds-image

这些装置包含有限的内置 ESD 保护。 存储或装卸时，应将导线一起截短或将装置放置于导电泡棉中，以防止 MOS 门极遭受静电损伤。

12.5 Glossary

SLYZ022 — TI Glossary.

This glossary lists and explains terms, acronyms, and definitions.