SLVSEF9H march   2018  – august 2023

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Options
  7. 6 Pin Configuration and Functions
  8. 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 Typical Characteristics
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Pulse Width Modulation (PWM) Operation
      2. 8.3.2 Power Save Mode (PSM) Operation
      3. 8.3.3 Minimum Duty Cycle and 100% Mode Operation
      4. 8.3.4 Soft Start
      5. 8.3.5 Switch Current Limit and HICCUP Short-Circuit Protection
      6. 8.3.6 Undervoltage Lockout
      7. 8.3.7 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable, Disable, and Output Discharge
      2. 8.4.2 Power Good
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Custom Design With WEBENCH® Tools
        2. 9.2.2.2 Setting The Output Voltage
        3. 9.2.2.3 Output Filter Design
        4. 9.2.2.4 Inductor Selection
        5. 9.2.2.5 Capacitor Selection
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
        1. 9.4.2.1 Thermal Considerations
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
      2. 10.1.2 Development Support
        1. 10.1.2.1 Custom Design With WEBENCH® Tools
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information

9.2.1 Design Requirements

For this design example, use the parameters listed in Table 9-1 as the input parameters.

Table 9-1 Design Parameters
DESIGN PARAMETEREXAMPLE VALUE
Input voltage, TPS62826x2.4 V to 5.5 V
Input voltage, TPS62827x2.5 V to 5.5 V
Output voltage1.8 V
Output ripple voltage< 20 mV
Maximum output current, TPS62826x3 A
Maximum output current, TPS62827x4 A

Table 9-2 lists the components used for the example.

Table 9-2 List of Components
REFERENCEDESCRIPTIONMANUFACTURER
C14.7 µF, Ceramic capacitor, 6.3 V, X7R, size 0603, JMK107BB7475MATaiyo Yuden
C2, TPS62824x/5x/6x/7A2 × 10 µF, Ceramic capacitor, 10 V, X7R, size 0603, GRM188Z71A106MA73DMurata
C2, TPS628273 × 10 µF, Ceramic capacitor, 10 V, X7R, size 0603, GRM188Z71A106MA73DMurata
C3120 pF, Ceramic capacitor, 50 V, size 0402Std
L10.47 µH, Power Inductor, XFL4015-471MEBCoilcraft
R1Depending on the output voltage, 1%, size 0402Std
R2100 kΩ, Chip resistor, 1/16 W, 1%, size 0402Std
R3100 kΩ, Chip resistor, 1/16 W, 1%, size 0402Std