ZHCS360F July   2012  – November 2020 TPS54020

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Description (Continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings (1)
    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  Input Voltage and Power Input Voltage Pins (VIN and PVIN)
      3. 8.3.3  Voltage Reference (VREF)
      4. 8.3.4  Adjusting the Output Voltage
      5. 8.3.5  Safe Start-up into Prebiased Outputs
      6. 8.3.6  Error Amplifier
      7. 8.3.7  Slope Compensation
      8. 8.3.8  Enable and Adjusting Undervoltage Lockout
      9. 8.3.9  Adjustable Switching Frequency and Synchronization (RT/CLK)
      10. 8.3.10 Soft-Start (SS) Sequence
      11. 8.3.11 Power Good (PWRGD)
      12. 8.3.12 Bootstrap Voltage (BOOT) and Low Dropout Operation
      13. 8.3.13 Sequencing (SS)
      14. 8.3.14 Output Overvoltage Protection (OVP)
      15. 8.3.15 Overcurrent Protection
        1. 8.3.15.1 High-side MOSFET Overcurrent Protection
        2. 8.3.15.2 Low-side MOSFET Overcurrent Protection
      16. 8.3.16 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Single-Supply Operation
      2. 8.4.2 Split Rail Operation
      3. 8.4.3 Continuous Current Mode Operation (CCM)
      4. 8.4.4 Eco-mode Light-Load Efficiency Operation
      5. 8.4.5 Adjustable Switching Frequency (RT Mode)
      6. 8.4.6 Synchronization (CLK Mode)
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Small Signal Model for Loop Response
      2. 9.1.2 Simple Small Signal Model for Peak Current Mode Control
      3. 9.1.3 Small Signal Model for Frequency Compensation
      4. 9.1.4 Designing the Device Loop Compensation
        1. 9.1.4.1 Step One: Determine the Crossover Frequency (fC)
        2. 9.1.4.2 Step Two: Determine a Value for R6
        3. 9.1.4.3 Step Three: Calculate the Compensation Zero.
        4. 9.1.4.4 Step Four: Calculate the Compensation Noise Pole.
        5. 9.1.4.5 Step Five: Calculate the Compensation Phase Boost Zero.
      5. 9.1.5 Fast Transient Considerations
    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  Operating Frequency
        3. 9.2.2.3  Output Inductor Selection
        4. 9.2.2.4  Output Capacitor Selection
          1. 9.2.2.4.1 Response to a Load Transient
          2. 9.2.2.4.2 Output Voltage Ripple
          3. 9.2.2.4.3 Bus Capacitance
        5. 9.2.2.5  Input Capacitor Selection
        6. 9.2.2.6  Soft-Start Capacitor Selection
        7. 9.2.2.7  Bootstrap Capacitor Selection
        8. 9.2.2.8  Undervoltage Lockout Set Point
        9. 9.2.2.9  Output Voltage Feedback Resistor Selection
          1. 9.2.2.9.1 Minimum Output Voltage
        10. 9.2.2.10 Compensation Component Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Development Support
        1. 12.1.1.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

4 Revision History

Changes from Revision E (March 2019) to Revision F (November 2020)

  • 更新了整个文档的表、图和交叉参考的编号格式。Go
  • 更新了应用Go
  • Removed 1000 V/V MIN specification for error amplified dc gainGo
  • Changed low-side switch sinking current limit units from "mA" to "A"Go
  • Increased MAX specification for low-side switch sinking current limit from -0.8 A to -1.15 AGo

Changes from Revision D (December 2014) to Revision E (March 2019)

Changes from Revision C (March 2013) to Revision D (November 2014)

  • 添加了引脚配置和功能 部分、处理额定值 表、特性说明、器件功能模式、应用和实施、电源相关建议、布局、器件和文档支持 以及机械、封装和可订购信息 部分Go

Changes from Revision B (February 2013) to Revision C (March 2013)

  • Deleted Note 2 from the Thermal Information tableGo
  • Added VIN internal UVLO threshold and VIN internal UVLO hysteresis rowsGo
  • Changed OVERVIEW paragraph "The TPS54020 starts up..."Go

Changes from Revision A (September 2012) to Revision B (February 2013)

  • Added the OVERVIEW paragraph "The TPS54020 starts up..."Go
  • Changed the Input Voltage and Power Input Voltage Pins (VIN and PVIN) sectionGo
  • Changed the DETAILED DESCRIPTION sectionGo
  • Changed the DESIGN EXAMPLE sectionGo

Changes from Revision * (July 2011) to Revision A (September 2012)

  • 将器件从“产品预发布”更改为“量产”Go
  • Changed the ELECTRICAL CHARACTERISTICS table.Go