ZHCSAC5D October   2012  – March 2017 TPS54340

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fixed Frequency PWM Control
      2. 7.3.2  Slope Compensation Output Current
      3. 7.3.3  Pulse Skip Eco-mode
      4. 7.3.4  Low Dropout Operation and Bootstrap Voltage (BOOT)
      5. 7.3.5  Error Amplifier
      6. 7.3.6  Adjusting the Output Voltage
      7. 7.3.7  Enable and Adjusting Undervoltage Lockout
      8. 7.3.8  Internal Soft-Start
      9. 7.3.9  Constant Switching Frequency and Timing Resistor (RT/CLK) Terminal)
      10. 7.3.10 Accurate Current Limit Operation and Maximum Switching Frequency
      11. 7.3.11 Synchronization to RT/CLKTerminal
      12. 7.3.12 Overvoltage Protection
      13. 7.3.13 Thermal Shutdown
      14. 7.3.14 Small Signal Model for Loop Response
      15. 7.3.15 Simple Small Signal Model for Peak Current Mode Control
      16. 7.3.16 Small Signal Model for Frequency Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation with VIN < 4.5 V (Minimum VIN)
      2. 7.4.2 Operation with EN Control
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Buck Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedures
          1. 8.2.1.2.1  Custom Design with WEBENCH Tools
          2. 8.2.1.2.2  Selecting the Switching Frequency
          3. 8.2.1.2.3  Output Inductor Selection (LO)
          4. 8.2.1.2.4  Output Capacitor
          5. 8.2.1.2.5  Catch Diode
          6. 8.2.1.2.6  Input Capacitor
          7. 8.2.1.2.7  Bootstrap Capacitor Selection
          8. 8.2.1.2.8  Undervoltage Lockout Set Point
          9. 8.2.1.2.9  Output Voltage and Feedback Resistors Selection
          10. 8.2.1.2.10 Minimum VIN
          11. 8.2.1.2.11 Compensation
          12. 8.2.1.2.12 Discontinuous Conduction Mode and Eco-mode Boundary
          13. 8.2.1.2.13 Power Dissipation
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Inverting Power
      3. 8.2.3 Split Rail Power Supply
    3. 8.3 WEBENCH Power Designer
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Estimated Circuit Area
  11. 11器件和文档支持
    1. 11.1 文档支持
      1. 11.1.1 使用 WEBENCH 工具定制设计方案
      2. 11.1.2 接收文档更新通知
      3. 11.1.3 相关文档　
    2. 11.2 商标
    3. 11.3 社区资源
    4. 11.4 静电放电警告
    5. 11.5 Glossary
  12. 12机械、封装和可订购信息

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 修订历史记录

Changes from C Revision (June 2016) to D Revision

  • Changed VIN MIN Value From: 4.5 V To: VO + VDO, and added Note 1 in the Recommended Operating ConditionsGo
  • Updated text and added Equation 1 in the Low Dropout Operation and Bootstrap Voltage (BOOT) Go
  • Deleted text: "The start and stop voltage for a typical 5 V..." and Figure: "5V Start/Stop Voltage" from the Low Dropout Operation and Bootstrap Voltage (BOOT) sectionGo
  • Added new section: Minimum VINGo
  • Deleted 2 graphs named "Low Dropout Operation" from the Application Curves sectionGo

Changes from B Revision (March 2014) to C Revision

Changes from A Revision (February 2013) to B Revision

  • 将数据表更改为全新 TI 版面布局Go
  • 已将应用范围列表从：12V，24V 和 48V 工业改为：12V，24V 工业Go
  • 已添加器件信息表Go
  • Added the Handling Ratings tableGo
  • Added the Recommended Operating Conditions tableGo
  • Added the Thermal Information table inside the document Go
  • Changed the Operating: nonswitching supply current TEST CONDITIONS From: FB = 0.83 V To: FB = 0.9 V Go
  • Changed RT/CLK high threshold MAX value From: 1.7 V To: 2 V Go
  • Changed Figure 6 title From: HIGH FREQUENCY RANGE To: LOW FREQUENCY RANGEGo
  • Changed Figure 7 title From: LOW FREQUENCY RANGE To: HIGH FREQUENCY RANGEGo
  • Added the Power Supply Recommendations sectionGo

Changes from * Revision (October 2012) to A Revision

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