SLVSIH2 May   2026 TPS61129-Q1

ADVMIX  

  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 Synchronous Rectifier and True Shutdown
      2. 7.3.2 Device Enable
      3. 7.3.3 Down Mode Threshold
      4. 7.3.4 SYNC/MODE Configuration
      5. 7.3.5 Output Discharge
      6. 7.3.6 Soft Start and Short-Circuit Protection
      7. 7.3.7 Power-Good Indicator
      8. 7.3.8 Spread Spectrum Frequency Modulation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Undervoltage Lockout
    5. 7.5 Programming
      1. 7.5.1 Programming the Output Voltage
  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 Inductor Selection
        2. 8.2.2.2 Input Capacitor Selection
        3. 8.2.2.3 Output Capacitor Selection
      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, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information

7.3.5 Output Discharge

The TPS61129-Q1 provides a resistive path to quickly discharge output when the EN pin is logic low. With this function, the VOUT is connected to ground through an internal resistor with typical resistance of 275Ω, preventing the output from “floating” or entering into an undetermined state. The output‑discharge function smooths power‑on and power‑off sequencing. Pay attention to the output discharge function when using this device in applications such as power multiplexing, because the output discharge circuitry creates a constant current path between the multiplexer output and the ground.