SLVSGM1B July   2023  – June 2024 TPSM828301 , TPSM828302 , TPSM828303

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Options
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information RDS Package
    5. 6.5 Thermal Information VCB Package
    6. 6.6 Electrical Characteristics
    7. 6.7 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Pulse Width Modulation (PWM) Operation
      2. 7.3.2 Power Save Mode (PSM) Operation
      3. 7.3.3 Start-Up and Soft Start
      4. 7.3.4 Switch Cycle-by-Cycle Current Limit
      5. 7.3.5 Undervoltage Lockout
      6. 7.3.6 Thermal Shutdown
      7. 7.3.7 Optimized EMI Performance
    4. 7.4 Device Functional Modes
      1. 7.4.1 Enable, Disable, and Output Discharge
      2. 7.4.2 Minimum Duty Cycle and 100% Mode Operation
      3. 7.4.3 Power Good
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Setting The Output Voltage
        3. 8.2.2.3 Input Capacitor Selection
        4. 8.2.2.4 Output Capacitor Selection
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
        1. 8.4.2.1 Thermal Considerations
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
        1. 9.1.2.1 Custom Design With WEBENCH® Tools
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.2.2.4 Output Capacitor Selection

The DCS-Control scheme of the TPSM82830x allows the use of tiny ceramic capacitors. Ceramic capacitors with low ESR values have the lowest output voltage ripple and are recommended. To keep low resistance up to high frequencies and to get narrow capacitance variation with temperature, TI recommends using X7R or X5R dielectrics. At light load currents, the converter operates in Power Save Mode and the output voltage ripple is dependent on the output capacitor value. A larger output capacitors can be used reducing the output voltage ripple. Considering the DC-bias derating the capacitance, the recommended minimum effective output capacitance is 12 µF. The recommended typical output capacitor value is 2 × 10 µF or 1 × 22 µF with an X5R or X7R dielectric. Table 8-4

Table 8-4 List of Recommended Capacitors
NOMINAL CAPACITANCE [µF] VOLTAGE RATING [V] DIMENSIONS [mm] MFR PART NUMBER(1)
10 6.3 2.0 × 1.5 × 1.25 MSASJ21GAB7106MTNA01, Taiyo Yuden
10 10 2.0 × 1.25 × 1.25 C2012X7R1A106K125AC, TDK
10 10 1.6 × 0.8 × 0.8 GRM188Z71A106KA73#, MuRata
10 10 1.6 × 0.8 × 0.8 C1608X5R1A106K080AC, TDK
22 10 2.0 × 1.25 × 1.25 GRM21BZ71A226ME15#, MuRata
22 10 1.6 × 0.8 × 0.8 C1608X5R1A226M080AC, TDK