SLUSFQ5 September   2025 UCC33421

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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  Power Ratings
    6. 6.6  Insulation Specifications
    7. 6.7  Safety Limiting Values
    8. 6.8  Electrical Characteristics
    9. 6.9  Insulation Characteristics Curves
    10. 6.10 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable and Disable
      2. 7.3.2 Output Voltage Soft-Start
      3. 7.3.3 Output Voltage Steady-State Regulation
      4. 7.3.4 Protection Features
        1. 7.3.4.1 Input Under-Voltage and Over-Voltage Lockout
        2. 7.3.4.2 Output Under-Voltage Protection
        3. 7.3.4.3 Output Over-Voltage Protection
        4. 7.3.4.4 Over-Temperature Protection
        5. 7.3.4.5 Fault Reporting and Auto-Restart
      5. 7.3.5 VCC Load Recommended Operating Area
      6. 7.3.6 Electromagnetic Compatibility (EMC) Considerations
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical and Packaging Information

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • DHA|16
散热焊盘机械数据 (封装 | 引脚)
订购信息

8.2.3 Application Curves

UCC33421 Start-Up with EN/FLT From Low to High: VINP = 5.0V, VCC = 5.0V, 18Ω LoadFigure 8-2 Start-Up with EN/FLT From Low to High: VINP = 5.0V, VCC = 5.0V, 18Ω Load
UCC33421 Load Transient: VINP = 5.0V, VCC = 5.0V, COUT2 = 22μF, IVCC = 0mA - 300mA - 0mAFigure 8-4 Load Transient: VINP = 5.0V, VCC = 5.0V, COUT2 = 22μF, IVCC = 0mA - 300mA - 0mA
UCC33421 Auto-Restart Operation Under Short Circuit Output: VINP = 5.0VFigure 8-6 Auto-Restart Operation Under Short Circuit Output: VINP = 5.0V
UCC33421 Steady State Output Voltage Ripple: VINP = 5.0V, VCC = 5.0V, 300mA LoadFigure 8-3 Steady State Output Voltage Ripple: VINP = 5.0V, VCC = 5.0V, 300mA Load
UCC33421 Output Short Circuit Operation: VINP = 5.0VFigure 8-5 Output Short Circuit Operation: VINP = 5.0V