SLVSB14B October   2011  – February 2016 TPS54821

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 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 Fixed Frequency PWM Control
      2. 7.3.2 Continuous Current Mode Operation (CCM)
      3. 7.3.3 VIN and Power VIN Pins (VIN and PVIN)
      4. 7.3.4 Voltage Reference
      5. 7.3.5 Adjusting the Output Voltage
      6. 7.3.6 Safe Start-up into Pre-Biased Outputs
      7. 7.3.7 Error Amplifier
      8. 7.3.8 Slope Compensation
    4. 7.4 Device Functional Modes
      1. 7.4.1  Enable and Adjusting Undervoltage Lockout
      2. 7.4.2  Adjustable Switching Frequency and Synchronization (RT/CLK)
      3. 7.4.3  Adjustable Switching Frequency (RT Mode)
      4. 7.4.4  Synchronization (CLK mode)
      5. 7.4.5  Slow Start (SS/TR)
      6. 7.4.6  Power Good (PWRGD)
      7. 7.4.7  Bootstrap Voltage (BOOT) and Low Dropout Operation
      8. 7.4.8  Sequencing (SS/TR)
      9. 7.4.9  Output Overvoltage Protection (OVP)
      10. 7.4.10 Overcurrent Protection
      11. 7.4.11 Thermal Shutdown
      12. 7.4.12 Small Signal Model for Loop Response
      13. 7.4.13 Simple Small Signal Model for Peak Current Mode Control
      14. 7.4.14 Small Signal Model for Frequency Compensation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Parameters
      2. 8.2.2 Design Guide - Step-By-Step Design Procedure
        1. 8.2.2.1  Typical Application Schematic
        2. 8.2.2.2  Operating Frequency
        3. 8.2.2.3  Output Inductor Selection
        4. 8.2.2.4  Output Capacitor Selection
        5. 8.2.2.5  Input Capacitor Selection
        6. 8.2.2.6  Slow Start Capacitor Selection
        7. 8.2.2.7  Bootstrap Capacitor Selection
        8. 8.2.2.8  Under Voltage Lockout Set Point
        9. 8.2.2.9  Output Voltage Feedback Resistor Selection
          1. 8.2.2.9.1 Minimum Output Voltage
        10. 8.2.2.10 Compensation Component Selection
        11. 8.2.2.11 Fast Transient Considerations
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 PCB Layout Guidelines
    2. 10.2 Layout Example
      1. 10.2.1 Estimated Circuit Area
  11. 11Device and Documentation Support
    1. 11.1 Trademarks
    2. 11.2 Electrostatic Discharge Caution
    3. 11.3 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

12 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation.