ZHCSNV8A December   2021  – June 2022 TPS63901

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Pin Configuration and 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 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Trapezoidal Current Control
      2. 7.3.2 Device Enable and Disable
      3. 7.3.3 Soft Start
      4. 7.3.4 Input Current Limit
      5. 7.3.5 Dynamic Voltage Scaling
      6. 7.3.6 Device Configuration (Resistor-to-Digital Interface)
      7. 7.3.7 SEL Pin
      8. 7.3.8 Short-Circuit Protection
        1. 7.3.8.1 Current Limit Setting = 'Unlimited'
        2. 7.3.8.2 Current Limit Setting = 1 mA to 100 mA
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Inductor Selection
        2. 8.2.2.2 Output Capacitor Selection
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Setting The Output Voltage
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 术语表
  12. 12Mechanical, Packaging, and Orderable Information

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7.3.8.2 Current Limit Setting = 1 mA to 100 mA

The input current limiting function automatically limits current during a short-circuit condition. The device regulates the average input current for as long as the short-circuit condition exists. If the output voltage falls below 1.25 V typically, the short circuit protection is activated. For input current limit settings of 100 mA, 50 mA, and 25 mA, the short circuit protection limits the input current to 26 mA on average. For input current limit setting of 10 mA, 5 mA, 2.5 mA, and 1 mA, the short circuit protection limits the input current to slightly above the typical values for each setting. Table 7-4 shows the typical short circuit currents for each input current limit setting.

The device automatically restarts to previous operation after the short condition is removed.

Table 7-4 Typical Input Current During Short Circuit Condition (VO < 1.25 V Typically) for All Input Current Limit Settings
Input Current Limit SettingTypical Short Circuit Input Current
1 mA1.2 mA
2.5 mA2.8 mA
5 mA5.2 mA
10 mA12 mA
25 mA26 mA
50 mA26 mA
100 mA26 mA
Unlimited26 mA