SLVSGQ1B January   2022  – January 2024 TPS61376

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 VCC Power Supply
      2. 6.3.2 Enable and Programmable UVLO
      3. 6.3.3 Soft Start and Inrush Current Control During Start-Up
      4. 6.3.4 Switching Frequency
      5. 6.3.5 Adjustable input average Current Limit
      6. 6.3.6 Shut Down and Load Disconnect
      7. 6.3.7 Overvoltage Protection
      8. 6.3.8 Output Short Protection
      9. 6.3.9 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 PWM Mode
      2. 6.4.2 Auto PFM Mode
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Setting Output Voltage
        2. 7.2.2.2 Inductor Selection
        3. 7.2.2.3 Bootstrap Capacitor Selection
        4. 7.2.2.4 Input Capacitor Selection
        5. 7.2.2.5 Output Capacitor Selection
        6. 7.2.2.6 Diode Selection
        7. 7.2.2.7 Loop Stability
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
        1. 7.4.2.1 Thermal Considerations
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3.3 Soft Start and Inrush Current Control During Start-Up

The TPS61376 has a soft-start and input average current limit function to prevent high inrush current during start-up. When the EN pin is pulled high, the TPS61376 starts to ramp up the output voltage by ramping an internal reference voltage from 0V to the reference voltage within typical 4ms. During start-up when VIN is higher than VOUT, the ISO FET between VP and SW pin will limit the current across the inductor. This current will increase linearly as the VIN and VOUT delta decreases. When VOUT is higher than VIN, TPS61376 will regulate the input average current programmed via ILIM pin.