SBVS449A June   2026  – August 2026 TPS7B7802-Q1

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 Timing Requirements - I2C Standard Mode
    7. 5.7 Timing Requirements - I2C Fast Mode
    8. 5.8 Timing Requirements - I2C Fast Mode Plus
    9. 5.9 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  Input Under-Voltage Lockout (UVLO)
      2. 6.3.2  Enable
      3. 6.3.3  Output Voltage Setting
      4. 6.3.4  Soft Start
      5. 6.3.5  Voltage Monitoring
      6. 6.3.6  Current Monitoring
      7. 6.3.7  Reverse Current Protection
      8. 6.3.8  Current Limit
      9. 6.3.9  Junction Temperature Monitoring
      10. 6.3.10 Thermal Protection
      11. 6.3.11 Protection Features and Diagnostic Capabilities
      12. 6.3.12 NERR Pin
      13. 6.3.13 Blanking Time
      14. 6.3.14 Switch Mode
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout
      3. 6.4.3 Operation with VIN < 4.5V
      4. 6.4.4 Disable
    5. 6.5 Programming
      1. 6.5.1 I2C Interface
        1. 6.5.1.1 I2C Interface Speed
      2. 6.5.2 I2C Data Transfer Protocol
        1. 6.5.2.1 START and STOP
        2. 6.5.2.2 Logical 1's and 0's
        3. 6.5.2.3 Data Format
      3. 6.5.3 Address Frame
      4. 6.5.4 Write Cycle
      5. 6.5.5 Read Cycle
  8. 7 Register Map
    1. 7.1 Default Settings
    2. 7.2 Register Details
  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 Input and Output Capacitor Selection
        2. 8.2.2.2 Adjustable Device Feedback Resistor Selection
        3. 8.2.2.3 Feed-Forward Capacitor
        4. 8.2.2.4 Power Dissipation (PD)
        5. 8.2.2.5 Estimating Junction Temperature
      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 Development Support
      2. 9.1.2 Device Nomenclature
    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.     80

6.3.8 Current Limit

To protect the device and downstream components from overcurrent flow, the TPS7B7802-Q1 device comes with an internal current limiting protection circuit. The device also allows the user to program the current limit value from the range 25mA ≤ ICL ≤ 400mA, independently for each channel. The selected value must be programmed into the Configuration Register 2 section of the Register Map. See the register description section for more details. The device implements a brick-wall scheme current limit. When the device hits a current limit condition in either or both channels and sources the programmed ICL current, the output voltage is not regulated. The load impedance determines the output voltage value.

Monitor the status of the ILIM1 and ILIM2 bits of the Latch Error Register and Run-Time Error Register in the register map. The appropriate ILIMx bit toggles to '1', if a current limit condition is detected either or both channels of the device.