SLVSFJ2B December   2020  – February 2023 TPS22950

PRODUCTION DATA  

  1. 1 Features
  2. 2 Application
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Current Limiting (TPS22950, TPS22950C)
      2. 9.3.2 Current Limiting (TPS22950L)
      3. 9.3.3 Adjusting the Current Limit
      4. 9.3.4 Reverse Current Blocking (TPS22950, TPS22950C)
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
    3. 10.3 Power Supply Recommendations
    4. 10.4 Layout
      1. 10.4.1 Layout Guidelines
      2. 10.4.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

10.2.2 Detailed Design Procedure

In this example the nominal load current is 100 mA, so the current limit can be set to 500 mA without disrupting normal operation. Use Equation 4 to calculate the resistor needed on the ILIM pin.
Equation 4. ILIM = 1.18 × (RILIM)–1.072
where

  • ILIM = Typical current limit setting

  • RILIM = Resistor on the ILIM pin

Based on Equation 4, a 2.21-kΩ resistor must be used on the ILIM pin to set a typical current limit of 500 mA.