SBVS458A January   2025  – April 2025 TPS7B4261-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 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 Tracker Output Voltage (VOUT)
        1. 6.3.1.1 Output Voltage Equal to Reference Voltage
        2. 6.3.1.2 Output Voltage Less Than the Reference Voltage
      2. 6.3.2 Reverse Current Protection
      3. 6.3.3 Power Good
      4. 6.3.4 Undervoltage Lockout
      5. 6.3.5 Thermal Protection
      6. 6.3.6 Current Limit
      7. 6.3.7 Output Short to Battery
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
      3. 6.4.3 Operation With VIN < 3.3V
      4. 6.4.4 Disable With ADJ and EN Controls
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Dropout Voltage
      2. 7.1.2 Reverse Current
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input and Output Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 Package Mounting
        2. 7.4.1.2 Board Layout Recommendations to Improve PSRR and Noise Performance
        3. 7.4.1.3 Power Dissipation and Thermal Considerations
        4. 7.4.1.4 Thermal Performance Versus Copper Area
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Mechanical Data

6.3.3 Power Good

The TPS7B4261-Q1 has an open-drain based power-good pin that helps detect undervoltage and overvoltage fault conditions at the tracker output. Pull up this pin to a regulated rail (VPULL-UP) with a pullup resistor. Use the VPG range of values listed in the Recommended Operating Conditions table to determine the maximum value of the VPULL-UP regulated rail. Make sure the input voltage VIN is higher than VUVLO (RISING) for VPG to have a valid value. VPG is the voltage of the power-good pin.

The power-good feature helps monitor the output voltage and detect possible fault conditions. This functionality is conditional on sufficient voltage being provided to the IN, ADJ, and EN pins. See the Recommended Operating Conditions table for the correct operating voltage ranges at these pins. The PG pin is pulled to VPULL-UP when the tracker output voltage remains within the VPG UV-TH and VPG OV-TH values of VADJ.

Variations in VOUT beyond the power-good switching thresholds lasting longer than tPG takes the PG pin low, to a voltage of VPG < VPG, LOW. Transients in VOUT that last less than tPG are not flagged as errors by the PG pin. VOUT is the tracker output voltage. The PG pin remains low when the device is disabled (VEN < VEN, OFF), even if sufficient VIN and VADJ are provided. The values of VPG UV-TH, VPG OV-TH, tPG, and VPG, LOW are specified in the Electrical Characteristics table.