JAJSPX3B February   2007  – June 2024 TPS2062-1 , TPS2065-1 , TPS2066-1

PRODUCTION DATA  

  1.   1
  2. 1 特長
  3. 2 アプリケーション
  4. 3 概要
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Typical Characteristics
  7. 6 Parameter Measurement Information
    1.     13
  8. 7 Detailed Description
    1. 7.1  Functional Block Diagram
    2. 7.2  Power Switch
    3. 7.3  Charge Pump
    4. 7.4  Driver
    5. 7.5  Enable ( ENx or ENx)
    6. 7.6  Current Sense
    7. 7.7  Overcurrent
      1. 7.7.1 Overcurrent Conditions (TPS2062-1 and TPS2065-1)
      2. 7.7.2 Overcurrent Conditions (TPS2066-1)
    8. 7.8  Overcurrent ( OCx)
    9. 7.9  Thermal Sense
    10. 7.10 Undervoltage Lockout
    11. 7.11 Discharge Function
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Power-Supply Considerations
      2. 8.1.2  OC Response
      3. 8.1.3  Power Dissipation and Junction Temperature
      4. 8.1.4  Thermal Protection
      5. 8.1.5  Undervoltage Lockout (UVLO)
      6. 8.1.6  Universal Serial Bus (USB) Applications
      7. 8.1.7  Host/Self-Powered and Bus-Powered Hubs
      8. 8.1.8  Low-Power Bus-Powered and High-Power Bus-Powered Functions
      9. 8.1.9  USB Power-Distribution Requirements
      10. 8.1.10 Generic Hot-Plug Applications
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
    2. 9.2 Documentation Support
    3. 9.3 ドキュメントの更新通知を受け取る方法
    4. 9.4 サポート・リソース
    5. 9.5 Trademarks
    6. 9.6 静電気放電に関する注意事項
    7. 9.7 用語集
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

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8.1.5 Undervoltage Lockout (UVLO)

An undervoltage lockout ensures that the power switch is in the off state at power up. Whenever the input voltage falls below approximately 2 V, the power switch is quickly turned off. The UVLO facilitates the design of hot-insertion systems where it is not possible to turn off the power switch before input power is removed. The UVLO also keeps the switch from being turned on until the power supply has reached at least 2 V, even if the switch is enabled. On reinsertion, the power switch is turned on, with a controlled rise time to reduce EMI and voltage overshoots.