ZHCSHH6B January   2018  – JANUARY 2019 TPSM846C24

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化电路原理图
      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 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics (VIN = 12 V)
    8. 6.8 Typical Characteristics (VIN = 5 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Minimum Capacitance Requirements
      2. 7.3.2  Setting the Compensation Network
      3. 7.3.3  Transient Response
      4. 7.3.4  Setting the Output Voltage
      5. 7.3.5  Differential Remote Sense
      6. 7.3.6  Switching Frequency and Synchronization
        1. 7.3.6.1 Setting the Switching Frequency
        2. 7.3.6.2 Synchronization
          1. 7.3.6.2.1 Stand-Alone Device Synchronization
          2. 7.3.6.2.2 Paralleled Devices Synchronization
      7. 7.3.7  Prebiased Output Start-Up
      8. 7.3.8  Power-Good (PGOOD) Indicator
      9. 7.3.9  Linear Regulators BP3 and BP6
      10. 7.3.10 Parallel Application
      11. 7.3.11 Parallel Operation
      12. 7.3.12 Overtemperature Protection
      13. 7.3.13 Overcurrent Protection
      14. 7.3.14 Output Overvoltage and Undervoltage Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Active Mode
      2. 7.4.2 Shutdown Mode
  8. 8 Application and Implementation
    1. 8.1 Typical Application
      1. 8.1.1 Design Requirements
      2. 8.1.2 Detailed Design Procedure
        1. 8.1.2.1 Custom Design With WEBENCH® Tools
        2. 8.1.2.2 Setting the Output Voltage
        3. 8.1.2.3 Input and Output Capacitance
        4. 8.1.2.4 Selecting the Compensation Components
        5. 8.1.2.5 Setting the Switching Frequency
        6. 8.1.2.6 Power Good (PGOOD)
        7. 8.1.2.7 ON/OFF Control (EN)
      3. 8.1.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Package Specifications
    4. 10.4 EMI
    5. 10.5 Mounting and Thermal Profile Recommendation
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 使用 WEBENCH® 工具创建定制设计
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 术语表
  12. 12机械、封装和可订购信息
    1. 12.1 Tape and Reel Information

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

7.3.8 Power-Good (PGOOD) Indicator

The TPSM846C24 has a built-in power-good signal (PGOOD) which indicates whether the output voltage is within its regulation range. The PGOOD pin is an open drain output that requires a pullup resistor to a voltage source of 5.5 V or less. The recommended pullup resistor value is between 10 kΩ and 100 kΩ. Once the output voltage rises above 95% of the set voltage, the PGOOD pin rises to the pullup voltage level. The PGOOD pin is pulled low when the output voltage drops lower than 88% or rises higher than 112% of the nominal set voltage.

The PGOOD signal can be connected to the EN pin of a different device to provide additional controlled turnon and turnoff sequencing.

The PGOOD signal is pulled low when the FB pin is prebiased to higher than 5% above the regulation level. This level of prebias is unusual and it is beneficial to flag a warning in this situation.

NOTE

The presence of a pullup voltage at the PGOOD pin before input voltage is applied, may cause the PGOOD pin to be pulled above a logic low voltage level. This is due to the limited pulldown capability in an un-powered condition. If this is not desired, increase the pullup resistance or reduce the external pullup supply voltage.
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