ZHCS447C SEPTEMBER   2011  – April  2018 TPS84210

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化应用
      2.      效率与输出电流间的关系
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Package Specifications
    3. 6.3 Thermal Information
    4. 6.4 Electrical Characteristics
    5. 6.5 Switching Characteristics
    6. 6.6 Typical Characteristics (VIN = 5 V)
    7. 6.7 Typical Characteristics (VIN = 3.3 V)
  7. 7 Functional Block Diagram
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Adjusting The Output Voltage
  9. 9 Capacitor Recommendations For The TPS84210 Power Supply
    1. 9.1 Capacitor Technologies
      1. 9.1.1 Electrolytic, Polymer-Electrolytic Capacitors
      2. 9.1.2 Ceramic Capacitors
      3. 9.1.3 Tantalum, Polymer-Tantalum Capacitors
    2. 9.2 Input Capacitor
    3. 9.3 Output Capacitor
  10. 10Transient Response
  11. 11Application Schematics
  12. 12Power Good (PWRGD)
  13. 13Power-Up Characteristics
  14. 14Remote Sense
  15. 15Output On/Off Inhibit (INH)
  16. 16Slow Start (SS/TR)
  17. 17Overcurrent Protection
  18. 18Synchronization (CLK)
  19. 19Sequencing (SS/TR)
  20. 20Programmable Undervoltage Lockout (UVLO)
  21. 21Thermal Shutdown
  22. 22Layout Guidelines
  23. 23Layout Example
  24. 24EMI
  25. 25器件和文档支持
    1. 25.1 接收文档更新通知
    2. 25.2 社区资源
    3. 25.3 商标
    4. 25.4 静电放电警告
    5. 25.5 术语表
  26. 26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

19 Sequencing (SS/TR)

Many of the common power supply sequencing methods can be implemented using the SS/TR, INH and PWRGD pins. The sequential method is illustrated in Figure 29 using two TPS84210 devices. The PWRGD pin of the first device is coupled to the INH pin of the second device which enables the second power supply once the primary supply reaches regulation. Do not place a pull-up resistor on PWRGD in this configuration. Figure 30 shows sequential turn-on waveforms of two TPS84210 devices.

TPS84210 v11120_lvsar5.gifFigure 29. Sequencing Schematic
TPS84210 SeqStartUp_WHITE.pngFigure 30. Sequencing Waveforms

Simultaneous power supply sequencing can be implemented by connecting the resistor network of R1 and R2 shown in Figure 31 to the output of the power supply that needs to be tracked or to another voltage reference source. Figure 32 shows simultaneous turn-on waveforms of two TPS84210 devices. Use and to calculate the values of R1 and R2.

TPS84210 TPS84410SimSequencing.gifFigure 31. Simultaneous Tracking Schematic
TPS84210 SimultStartup_WHITE.pngFigure 32. Simultaneous Tracking Waveforms