JAJSBO6B June   2012  – May 2019 TPS54678

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      概略回路図
      2.      効率と出力電流との関係
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Fixed Frequency PWM Control
      2. 8.3.2  Slope Compensation and Output Current
      3. 8.3.3  Bootstrap Voltage (Boot) and Low Dropout Operation
      4. 8.3.4  Error Amplifier
      5. 8.3.5  Voltage Reference
      6. 8.3.6  Adjusting the Output Voltage
      7. 8.3.7  Enable and Adjusting Undervoltage Lockout
      8. 8.3.8  Soft-Start Pin
      9. 8.3.9  Sequencing
      10. 8.3.10 Constant Switching Frequency and Timing Resistor (RT/CLK Pin)
      11. 8.3.11 Overcurrent Protection
        1. 8.3.11.1 High-Side Overcurrent Protection
        2. 8.3.11.2 Low-Side Overcurrent Protection
      12. 8.3.12 Safe Start-Up into Prebiased Outputs
      13. 8.3.13 Synchronize Using the RT/CLK Pin
      14. 8.3.14 Power Good (PWRGD Pin)
      15. 8.3.15 Overvoltage Transient Protection
      16. 8.3.16 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Small Signal Model for Loop Response
      2. 8.4.2 Simple Small Signal Model for Peak Current Mode Control
      3. 8.4.3 Small Signal Model for Frequency Compensation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Step One: Select the Switching Frequency
        3. 9.2.2.3 Step Two: Select the Output Inductor
        4. 9.2.2.4 Step Three: Choose the Output Capacitor
        5. 9.2.2.5 Step Four: Select the Input Capacitor
        6. 9.2.2.6 Step Five: Choose the Soft-Start Capacitor
        7. 9.2.2.7 Step Six: Select the Bootstrap Capacitor
        8. 9.2.2.8 Step Eight: Select Output Voltage and Feedback Resistors
          1. 9.2.2.8.1 Output Voltage Limitations
        9. 9.2.2.9 Step Nine: Select Loop Compensation Components
      3. 9.2.3 Application Curves
        1. 9.2.3.1 Additional Information About Application Curves
          1. 9.2.3.1.1 Efficiency
          2. 9.2.3.1.2 Voltage Ripple Measurements
          3. 9.2.3.1.3 Start-Up and Shutdown Waveforms
          4. 9.2.3.1.4 Hiccup Mode Current Limit
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Power Dissipation Estimate
  12. 12デバイスおよびドキュメントのサポート
    1. 12.1 デバイス・サポート
      1. 12.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 12.1.2 開発サポート
        1. 12.1.2.1 WEBENCH®ツールによるカスタム設計
    2. 12.2 ドキュメントのサポート
      1. 12.2.1 関連資料
    3. 12.3 ドキュメントの更新通知を受け取る方法
    4. 12.4 コミュニティ・リソース
    5. 12.5 商標
    6. 12.6 静電気放電に関する注意事項
    7. 12.7 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

7.6 Typical Characteristics

TPS54678 G001_SLVSBF3.png
Figure 1. Shutdown Supply Current vs Junction Temperature
TPS54678 G003_SLVSBF3.png
Figure 3. EN Pin Voltage vs Junction Temperature
TPS54678 G005_SLVSBF3.png
Figure 5. Voltage Reference vs Junction Temperature
TPS54678 G007_SLVSBF3.png
Figure 7. Transconductance vs Junction Temperature
TPS54678 G009_SLVSBF3.gif
Figure 9. Switching Frequency vs RT Pin Resistance
TPS54678 G011_SLVSBF3.png
Figure 11. VSS Voltage Threshold vs Junction Temperature
TPS54678 G013_SLVSBF3.png
Figure 13. SS Charge Current vs Junction Temperature
TPS54678 G015_SLVSBF3.png
Figure 15. PWRGD Threshold vs Junction Temperature
TPS54678 G017_SLVSBF3.png
Figure 17. Efficiency vs Load Current
TPS54678 G019_SLVSBF3.png
Figure 19. Efficiency vs Load Current
TPS54678 G002_SLVSBF3.png
Figure 2. VIN Operating Current vs Junction Temperature
TPS54678 G004_SLVSBF3.png
Figure 4. EN Pin Current vs Junction Temperature
TPS54678 G006_SLVSBF3.png
Figure 6. MOSFET Rds(on) vs Junction Temperature
TPS54678 G008_SLVSBF3.png
Figure 8. High-Side FET Current Limit vs Junction Temperature
TPS54678 G010_SLVSBF3.png
Figure 10. Switching Frequency vs Junction Temperature
TPS54678 G012_SLVSBF3.png
Figure 12. SS Charge Current vs Junction Temperature
TPS54678 G014_SLVSBF3.png
Figure 14. PWRGD Rds(on) vs Junction Temperature
TPS54678 G016_SLVSBF3.png
Figure 16. PWRGD Leakage Current vs Junction Temperature
TPS54678 G018_SLVSBF3.png
Figure 18. Efficiency vs Load Current
TPS54678 G020_SLVSBF3.png
Figure 20. Efficiency vs Load Current