SLVSI80 March   2026 TPS552852

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  Mode/SYNC Pin Configuration
      3. 6.3.3  Input Undervoltage Lockout
      4. 6.3.4  Enable and Programmable UVLO
      5. 6.3.5  Soft Start
      6. 6.3.6  Shutdown
      7. 6.3.7  Switching Frequency
      8. 6.3.8  Inductor Current Limit
      9. 6.3.9  Internal Charge Path
      10. 6.3.10 Output Voltage Setting
      11. 6.3.11 Output Current Limit
      12. 6.3.12 Input Overvoltage Protection
      13. 6.3.13 Output Overvoltage Protection
      14. 6.3.14 Output Short-Circuit Protection
      15. 6.3.15 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 PWM Mode
      2. 6.4.2 Power Save 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 Inductor Selection
        2. 7.2.2.2 Input Capacitor
        3. 7.2.2.3 Output Capacitor
        4. 7.2.2.4 Output Current Limit
        5. 7.2.2.5 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
  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

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6.3.11 Output Current Limit

The TPS552852 supports output current limit function in buck, buck-boost and boost mode without external current sense resistor. The output current limit is programmable by a resistor RILIM between the ILIM pin and the AGND pin. The detailed equation is updated in the following.

Equation 4. R ILIM ohm = 0.9 I LIM A -0.5 × 169000

If the set ILIM is lower than 500mA or the ILIM pin is left floating, the ILIM is clamped at minimum value 500mA.

If not using this function, connect ILIM to AGND directly and the output current limit function is disabled.