SLVSDD1G December   2017  – June 2024 TPS62800 , TPS62801 , TPS62802 , TPS62806 , TPS62807 , TPS62808

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  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 Electrical Characteristics
    6. 6.6 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 Smart Enable and Shutdown (EN)
      2. 7.3.2 Soft Start
      3. 7.3.3 VSEL/MODE Pin
        1. 7.3.3.1 Output Voltage Selection (R2D Converter)
        2. 7.3.3.2 Mode Selection — Power Save Mode and Forced PWM Operation
      4. 7.3.4 Undervoltage Lockout (UVLO)
      5. 7.3.5 Switch Current Limit and Short Circuit Protection
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Output Voltage Discharge
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Save Mode Operation
      2. 7.4.2 Forced PWM Mode Operation
      3. 7.4.3 100% Mode Operation
      4. 7.4.4 Optimized Transient Performance from PWM-to-PFM Mode Operation
  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
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 Input Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Mechanical Data

7.3.5 Switch Current Limit and Short Circuit Protection

The TPS6280x integrates a current limit on the high-side and low-side MOSFETs to protect the device against overload or short circuit conditions. The current in the switches is monitored cycle by cycle. If the high-side MOSFET current limit, ILIMF, trips, the high-side MOSFET is turned off and the low-side MOSFET is turned on to ramp down the inductor current. After the inductor current through the low-side switch decreases below the low-side MOSFET current limit, ILIMF, the low-side MOSFET is turned off and the high-side MOSFET turns on again.