SLUSG22 October   2025 UCC35131-Q1

ADVANCE INFORMATION  

  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 Insulation Specifications
    6. 6.6 Electrical Characteristics
    7. 6.7 Safety-Related Certifications
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Pre-Production Samples Operating Limits
    3. 7.3 Functional Block Diagram
    4. 7.4 Feature Description
      1. 7.4.1 Power Stage Operation
        1. 7.4.1.1 VDD-COM Voltage Regulation
        2. 7.4.1.2 COM-VEE Voltage Regulation
      2. 7.4.2 Output Voltage Soft Start
      3. 7.4.3 ENA and Power-Good
      4. 7.4.4 Protection Functions
        1. 7.4.4.1 Input Undervoltage Lockout
        2. 7.4.4.2 Input Overvoltage Lockout
        3. 7.4.4.3 Output Undervoltage Protection
        4. 7.4.4.4 Output Overvoltage Protection
        5. 7.4.4.5 Over-Temperature Protection
        6. 7.4.4.6 BSW Pin Faults Protection
    5. 7.5 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
        1. 8.2.2.1 VDD-COM Voltage Regulation
        2. 8.2.2.2 COM-VEE Voltage Regulation and Single Output Configuration
    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 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

8.4 Power Supply Recommendations

The recommended input supply voltage (VVIN) for UCC35131-Q1 is between 5.5V and 20V. To help ensure reliable operation, adequate decoupling capacitors must be located as close to supply pins as possible. Local bypass capacitors must be placed between the VIN and GNDP pins at the input; between VDD and COM, and between COM and VEE at the output. TI recommends low ESR, ceramic surface mount capacitors to provide the recommended capacitance for high frequency decoupling. The input supply must have an appropriate current rating to support output load required by the end application.