JAJSBA0Q January   2000  – December 2017 LP2950-N , LP2951-N

PRODUCTION DATA.  

  1. 特長
  2. アプリケーション
    1.     LP2951の概略回路図
  3. 概要
    1.     LP2950-Nの概略回路図
  4. 改訂履歴
  5. Voltage Options
  6. Pin Configuration and Functions
    1.     Pin Functions: LP2950-N
    2.     Pin Functions: LP2951-N
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information: LP2950-N
    5. 7.5 Thermal Information: LP2951-N
    6. 7.6 Electrical Characteristics
    7. 7.7 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagrams
    3. 8.3 Feature Description
      1. 8.3.1 Fixed Voltage Options and Programmable Voltage Version
      2. 8.3.2 High Accuracy Output Voltage
      3. 8.3.3 Low Dropout Voltage
      4. 8.3.4 Shutdown Mode
      5. 8.3.5 Error Detection Comparator Output
      6. 8.3.6 Internal Protection Circuitry
        1. 8.3.6.1 Short-Circuit Protection (Current Limit)
        2. 8.3.6.2 Thermal Protection
      7. 8.3.7 Enhanced Stability
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operation with 30 V ≥ VIN > VOUT(TARGET) + 1 V
      2. 8.4.2 Operation with Shutdown Control
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1  1-A Regulator with 1.2-V Dropout
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Output Capacitor Requirements
          2. 9.2.1.2.2 Input Capacitor Requirements
          3. 9.2.1.2.3 Error Detection Comparator Output
          4. 9.2.1.2.4 Programming the Output Voltage (LP2951-N)
          5. 9.2.1.2.5 Reducing Output Noise
        3. 9.2.1.3 Application Curves
      2. 9.2.2  300-mA Regulator with 0.75-V Dropout
      3. 9.2.3  Wide Input Voltage Range Current Limiter
      4. 9.2.4  Low Drift Current Source
      5. 9.2.5  5-V Current Limiter
      6. 9.2.6  Regulator with Early Warning and Auxiliary Output
      7. 9.2.7  Latch Off When Error Flag Occurs
      8. 9.2.8  2-A Low Dropout Regulator
      9. 9.2.9  5-V Regulator with 2.5-V Sleep Function
      10. 9.2.10 Open Circuit Detector for 4 → 20-mA Current Loop
      11. 9.2.11 Regulator with State-of-Charge Indicator
      12. 9.2.12 Low Battery Disconnect
      13. 9.2.13 System Overtemperature Protection Circuit
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 WSON Mounting
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 ドキュメントのサポート
      1. 12.1.1 関連資料
    2. 12.2 関連リンク
    3. 12.3 コミュニティ・リソース
    4. 12.4 商標
    5. 12.5 静電気放電に関する注意事項
    6. 12.6 Glossary
  13. 13メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ(パッケージ|ピン)
サーマルパッド・メカニカル・データ
発注情報

Typical Characteristics

LP2950-N LP2951-N 854627.pngFigure 1. Quiescent Current
LP2950-N LP2951-N 854629.pngFigure 3. Input Current
LP2950-N LP2951-N 854631.pngFigure 5. Output Voltage vs. Temperature of 3 Representative Units
LP2950-N LP2951-N 854633.pngFigure 7. Quiescent Current
LP2950-N LP2951-N 854635.pngFigure 9. Quiescent Current
LP2950-N LP2951-N 854637.pngFigure 11. Dropout Voltage
LP2950-N LP2951-N 854639.pngFigure 13. LP2951-N Minimum Operating Voltage
LP2950-N LP2951-N 854641.pngFigure 15. LP2951-N Feedback Pin Current
LP2950-N LP2951-N 854643.pngFigure 17. LP2951-N Comparator Sink Current
LP2950-N LP2951-N 854648.pngFigure 19. Output Impedance
LP2950-N LP2951-N 854650.pngFigure 21. Ripple Rejection
LP2950-N LP2951-N 854652.pngFigure 23. LP2951-N Output Noise
LP2950-N LP2951-N 854654.pngFigure 25. Shutdown Threshold Voltage
LP2950-N LP2951-N 854656.pngFigure 27. LP2951-N Maximum Rated Output Current
LP2950-N LP2951-N 854658.pngFigure 29. Thermal Response
LP2950-N LP2951-N 854672.gifFigure 31. LP2951-N Input Pin Current vs Input Voltage
LP2950-N LP2951-N 854628.pngFigure 2. Dropout Characteristics
LP2950-N LP2951-N 854630.pngFigure 4. Input Current
LP2950-N LP2951-N 854632.pngFigure 6. Quiescent Current
LP2950-N LP2951-N 854634.pngFigure 8. Quiescent Current
LP2950-N LP2951-N 854636.pngFigure 10. Short Circuit Current
LP2950-N LP2951-N 854638.pngFigure 12. Dropout Voltage
LP2950-N LP2951-N 854640.pngFigure 14. LP2951-N Feedback Bias Current
LP2950-N LP2951-N 854642.pngFigure 16. LP2951-N Error Comparator Output
LP2950-N LP2951-N 854647.pngFigure 18. LP2951-N Enable Transient
LP2950-N LP2951-N 854649.pngFigure 20. Ripple Rejection
LP2950-N LP2951-N 854651.pngFigure 22. Ripple Rejection
LP2950-N LP2951-N 854653.pngFigure 24. LP2951-N Divider Resistance
LP2950-N LP2951-N 854655.pngFigure 26. Line Regulation
LP2950-N LP2951-N 854657.pngFigure 28. LP2950-N Maximum Rated Output Current
LP2950-N LP2951-N 854663.pngFigure 30. Output Capacitor ESR Range
LP2950-N LP2951-N 854673.gifFigure 32. LP2951-N Input Pin Current vs Input Voltage