SLVSGC1B December   2021  – August 2024 TPS63901

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 Trapezoidal Current Control
      2. 6.3.2 Device Enable and Disable
      3. 6.3.3 Soft Start
      4. 6.3.4 Input Current Limit
      5. 6.3.5 Dynamic Voltage Scaling
      6. 6.3.6 Device Configuration (Resistor-to-Digital Interface)
      7. 6.3.7 SEL Pin
      8. 6.3.8 Short-Circuit Protection
        1. 6.3.8.1 Current Limit Setting = 'Unlimited'
        2. 6.3.8.2 Current Limit Setting = 1 mA to 100 mA
      9. 6.3.9 Thermal Shutdown
    4. 6.4 Device Functional Modes
  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 Output Capacitor Selection
        3. 7.2.2.3 Input Capacitor Selection
        4. 7.2.2.4 Setting The Output Voltage
      3. 7.2.3 Application Curves
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

7.2.2.2 Output Capacitor Selection

For the output capacitor, use of small ceramic capacitors placed as close as possible to the VOUT and GND pins of the IC is recommended. The recommended nominal output capacitor value is a single 22 µF. If, for any reason, the application requires the use of large capacitors, which cannot be placed close to the IC, use a smaller ceramic capacitor in parallel to the large capacitor. The small capacitor must be placed as close as possible to the VOUT and GND pins of the IC.

It is important that the effective capacitance is given according to the recommended value in the Recommended Operating Conditions. In general, consider DC bias effects resulting in less effective capacitance. The choice of the output capacitance is mainly a trade-off between size and transient behavior as higher capacitance reduces transient response overshoot and undershoot and increases transient response time. Possible output capacitors are listed in Table 7-3.

There is no upper limit for the output capacitance value.

At light load currents, the output voltage ripple is dependent on the output capacitor value. Larger output capacitors reduce the output voltage ripple. The leakage current of the output capacitor adds to the overall quiescent current.

Table 7-3 List of Recommended Capacitors
Capacitor Value [µF](1) Voltage Rating [V] Part Number Manufacturer Size (Metric)
22 6.3 GRM187R60J226ME15 Murata 0603 (1608)
22 6.3 GRM219R60J476ME44 Murata 0805 (3210)
47 6.3 GRM188R60J476ME15 Murata 0603 (1608)