JAJSSB5I July   2004  – February 2025 LP2981 , LP2981A

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 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Output Enable
      2. 6.3.2 Dropout Voltage
      3. 6.3.3 Current Limit
        1. 6.3.3.1 Current Limit (Legacy Chip)
        2. 6.3.3.2 Current Limit (New Chip)
      4. 6.3.4 Undervoltage Lockout (UVLO)
      5. 6.3.5 Thermal Shutdown
      6. 6.3.6 Output Pulldown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
      3. 6.4.3 Disabled
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Recommended Capacitor Types
        1. 7.1.1.1 Recommended Capacitors (Legacy Chip)
          1. 7.1.1.1.1 Tantalum Capacitors
          2. 7.1.1.1.2 Ceramic Capacitors
          3. 7.1.1.1.3 Aluminum Capacitors
        2. 7.1.1.2 Recommended Capacitors (New Chip)
      2. 7.1.2 Input and Output Capacitor Requirements
        1. 7.1.2.1 Input Capacitor
        2. 7.1.2.2 Output Capacitor
          1. 7.1.2.2.1 Output Capacitor (Legacy Chip)
          2. 7.1.2.2.2 Output Capacitor (New Chip)
      3. 7.1.3 Estimating Junction Temperature
      4. 7.1.4 Power Dissipation (PD)
      5. 7.1.5 Reverse Current
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 ON and OFF Input Operation
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 サポート・リソース
    5. 8.5 Trademarks
    6. 8.6 静電気放電に関する注意事項
    7. 8.7 用語集
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

9 Revision History

Changes from Revision H (May 2024) to Revision I (February 2025)

  • ドキュメント全体わたって LP2981A の情報を追加Go
  • 、「概要」セクションの最後の文に、ソフトスタート メカニズムが新しいチップと関連していることに関する明確化内容を追加Go
  • Changed description of NC (pin 4)Go
  • Changed Short-Circuit Current vs Time (New Chip), Instantaneous Short-Circuit Current vs Temperature (New Chip), Short-Circuit Current vs Output Voltage (VOUT) (New Chip) curvesGo
  • Changed Overview sectionGo
  • Changed Functional Block Diagrams sectionGo
  • Changed Output Enable sectionGo
  • Added Current Limit (Legacy Chip) and Current Limit (New Chip) sectionsGo
  • Added maximum supported ESR range discussion to Recommended Capacitors (New Chip) sectionGo
  • Changed Output Capacitor sectionGo
  • Changed Device Nomenclature sectionGo

Changes from Revision G (July 2016) to Revision H (December 2023)

  • ドキュメント全体にわたって表、図、相互参照の採番方法を更新Go
  • 現在のファミリのフォーマットに合わせてドキュメント全体を変更Go
  • ドキュメントに M3 デバイスを追加Go
  • Added Device Nomenclature sectionGo
  • Added three references to Related Documentation Go