SLVSIJ1 October   2025 TPS631013A

PRODMIX  

  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 Rating
    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
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Lockout (UVLO)
      2. 7.3.2 Enable and Soft Start
      3. 7.3.3 Device Enable (EN)
      4. 7.3.4 Output Voltage Control
      5. 7.3.5 Mode Selection (PFM/FPWM)
      6. 7.3.6 Output Discharge
      7. 7.3.7 Reverse Current Operation
      8. 7.3.8 Protection Features
        1. 7.3.8.1 Input Overvoltage Protection
        2. 7.3.8.2 Output Overvoltage Protection
        3. 7.3.8.3 Short Circuit Protection/Hiccup
        4. 7.3.8.4 Thermal Shutdown
    4. 7.4 Device Functional Modes
    5. 7.5 Programming
      1. 7.5.1 Serial Interface Description
      2. 7.5.2 Standard-, Fast-, and Fast-Mode Plus Protocol
      3. 7.5.3 I2C Update Sequence
  9. 8 Register Map
    1. 8.1 Register Description
      1. 8.1.1 Register Map
      2. 8.1.2 Register CONTROL1 (Register address: 0x02; Default: 0x09)
      3. 8.1.3 Register VOUT (Register address: 0x03; Default: 0x5C)
      4. 8.1.4 Register CONTROL2 (Register address: 0x05; Default: 0x75)
  10. 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 Inductor Selection
        2. 9.2.2.2 Output Capacitor Selection
        3. 9.2.2.3 Input Capacitor Selection
        4. 9.2.2.4 Setting the Output Voltage
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information
    1.     66

7.3.7 Reverse Current Operation

The device supports reverse current operation (the current flows from VOUT pin to VIN pin) in FPWM mode. If the internal output feedback voltage is higher than the reference voltage, the converter regulation forces a current into the input capacitor. The reverse current operation is independent of the VIN voltage or VOUT voltage ratio, hence it is possible on all device operation modes boost, buck, or buck-boost.