SLVSGT8 December   2022 TPS25961

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Undervoltage Protection (UVP) and Undervoltage Lockout (UVLO)
      2. 7.3.2 Overvoltage Protection
      3. 7.3.3 Inrush Current, Overcurrent and Short Circuit Protection
        1. 7.3.3.1 Slew Rate and Inrush Current Control (dVdt)
        2. 7.3.3.2 Active Current Limiting
        3. 7.3.3.3 Short-Circuit Protection
      4. 7.3.4 Overtemperature Protection (OTP)
      5. 7.3.5 Fault Response
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Adapter input protection for set-top boxes
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Programming the Current-Limit Threshold: RILM Selection
        2. 8.2.3.2 Undervoltage and Overvoltage Lockout Set Point
        3. 8.2.3.3 Output Voltage Rise Time (tR)
      4. 8.2.4 Application Curves
    3. 8.3 Application Example
      1. 8.3.1 Application Curves
    4. 8.4 Power Supply Recommendations
      1. 8.4.1 Transient Protection
      2. 8.4.2 Output Short-Circuit Measurements
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.3 Application Example

TPS25961 can also be used as a low cost current limiter device replacing discrete PTC for memory card port protection in end equipments like IP camera, Laptop etc. Typical SD cards operate at 3.3-V and draw current less than 100 mA. TPS25961 can be configured for protection in this application without the need for many external components. Keeping OVLO pin grounded and ILIM pin open would set fixed overvoltage protection thresold of 5.98 V and current limit of 115 mA. EN pin can be tied to VIN pin through a pullup resistor. Figure 8-9 shows example layout for TPS25961 for above mentioned configuration, achieved on a single layer board with minimum components.

Figure 8-8 SD card port protection using TPS25961

GUID-20221122-SS0I-T8GQ-NSHZ-DXWFPB5MZXVM-low.gifFigure 8-9 TPS25961 layout example for SD card port protection application