ZHCSFB9B June   2016  – March 2019 TPS63070

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图
      2.      效率与输出电流间的关系；Vo = 5V
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram TPS63070
    3. 8.3 Functional Block Diagram TPS630701
    4. 8.4 Feature Description
      1. 8.4.1  Control Loop Description
      2. 8.4.2  Precise Enable
      3. 8.4.3  Power Good
      4. 8.4.4  Soft Start
      5. 8.4.5  PS/SYNC
      6. 8.4.6  Short Circuit Protection
      7. 8.4.7  VSEL and FB2 pins
      8. 8.4.8  Overvoltage Protection
      9. 8.4.9  Undervoltage Lockout
      10. 8.4.10 Overtemperature Protection
    5. 8.5 Device Functional Modes
      1. 8.5.1 Power Save Mode
      2. 8.5.2 Current Limit
      3. 8.5.3 Output Discharge Function (TPS630702 only)
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application for adjustable version
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Programming The Output Voltage
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Capacitor Selection
          1. 9.2.2.3.1 Input Capacitor
          2. 9.2.2.3.2 Output Capacitor
      3. 9.2.3 Application Curves
    3. 9.3 Typical Application for Fixed Voltage Version
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
      3. 9.3.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Thermal Information
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
      1. 12.1.1 第三方产品免责声明
    2. 12.2 相关链接
    3. 12.3 接收文档更新通知
    4. 12.4 社区资源
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 术语表
  13. 13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

8.4.4 Soft Start

To minimize inrush current during start up, the device has a soft start. When the EN pin is set high, after a thermal shutdown or after the undervoltage lockout threshold is exceeded, a soft-start cycle is started and the input current is ramped until the output voltage reaches regulation. The device ramps up the output voltage in a controlled manner, even if a large capacitor is connected at the output. During soft-start, as long as the output voltage is below the power good threshold, the input current limit is reduced to typically 1A. The soft-start time is defined by the current limit during the soft-start phase along with the load current, output capacitance and the input to output voltage ratio.