JAJSC12D October   2013  – April 2018 TPS7B67-Q1

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      可変出力オプション
      2.      固定出力オプション
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Device Comparison
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements
    7. 8.7 Typical Characteristics
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagrams
    3. 9.3 Feature Description
      1. 9.3.1 Enable (EN)
      2. 9.3.2 Regulated Output (VOUT)
      3. 9.3.3 Power-On-Reset (RESET)
      4. 9.3.4 Reset Delay Timer (DELAY)
      5. 9.3.5 Adjustable Output Voltage (ADJ for TPS7B6701)
      6. 9.3.6 Undervoltage Shutdown
      7. 9.3.7 Thermal Shutdown
      8. 9.3.8 Thermal Protection
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operation With VIN < 4 V
      2. 9.4.2 Operation With EN Control
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Power Dissipation and Thermal Considerations
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
    1. 11.1 Dropout Recovery
      1. 11.1.1 LDO Dropout Recovery Explained
      2. 11.1.2 TPS7B67xx-Q1 Dropout During Startup
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Enhanced Thermal Pad
      2. 12.1.2 Package Mounting
      3. 12.1.3 Board Layout Recommendations to Improve PSRR and Noise Performance
      4. 12.1.4 Additional Layout Considerations
    2. 12.2 Layout Example
  13. 13デバイスおよびドキュメントのサポート
    1. 13.1 関連リンク
    2. 13.2 ドキュメントの更新通知を受け取る方法
    3. 13.3 コミュニティ・リソース
    4. 13.4 商標
    5. 13.5 静電気放電に関する注意事項
    6. 13.6 Glossary
  14. 14メカニカル、パッケージ、および注文情報

9.3.8 Thermal Protection

Thermal protection disables the output when the junction temperature rises to approximately 175°C which allows the device to cool. When the junction temperature cools to approximately 150°C, the output circuitry enables. Based on power dissipation, thermal resistance, and ambient temperature, the thermal protection circuit may cycle on and off. This cycling limits the dissipation of the regulator and protects it from damage as a result of overheating.

The internal protection circuitry of the TPS7B67xx-Q1 device has been designed to protect against overload conditions. The circuitry was not intended to replace proper heat-sinking. Continuously running the TPS7B67xx-Q1 device into thermal shutdown degrades device reliability.