Benutzerhandbuch für Texas Instruments TPS54560 Step-Down DC-DC Converter Evaluation Module TPS54560EVM-515

Inhaltsverzeichnis

• 1 Features

  1
• 2 Applications

  1
• 3 Description

  1
• 4 Simplified Schematic

  1
• Table of Contents

  1
• 5 Revision History

  2
• 6 Terminal Configuration and Functions

  3
• 7 Specifications

  4
  • 7.1 Absolute Maximum Ratings

    4
  • 7.2 Handling Ratings

    4
  • 7.3 Recommended Operating Conditions

    4
  • 7.4 Thermal Information

    4
  • 7.5 Electrical Characteristics

    5
  • 7.6 Timing Requirements

    6
  • 7.7 Typical Characteristics

    6
• 8 Detailed Description

  10
  • 8.1 Overview

    10
  • 8.2 Functional Block Diagram

    11
  • 8.3 Feature Description

    11
    • 8.3.1 Fixed Frequency PWM Control

      11
    • 8.3.2 Slope Compensation Output Current

      11
    • 8.3.3 Pulse Skip Eco-mode

      12
    • 8.3.4 Low Dropout Operation and Bootstrap Voltage (BOOT)

      12
    • 8.3.5 Error Amplifier

      13
    • 8.3.6 Adjusting the Output Voltage

      13
    • 8.3.7 Enable and Adjusting Undervoltage Lockout

      13
    • 8.3.8 Internal Soft-Start

      14
    • 8.3.9 Constant Switching Frequency and Timing Resistor (RT/CLK) Terminal)

      14
    • 8.3.10 Accurate Current Limit Operation and Maximum Switching Frequency

      15
    • 8.3.11 Synchronization to RT/CLK Terminal

      16
    • 8.3.12 Overvoltage Protection

      18
    • 8.3.13 Thermal Shutdown

      18
    • 8.3.14 Small Signal Model for Loop Response

      18
    • 8.3.15 Simple Small Signal Model for Peak Current Mode Control

      19
    • 8.3.16 Small Signal Model for Frequency Compensation

      20
  • 8.4 Device Functional Modes

    22
    • 8.4.1 Operation with VIN < 4.5 V (Minimum VIN)

      22
    • 8.4.2 Operation with EN Control

      22
    • 8.4.3 Alternate Power Supply Topologies

      22
• 9 Application and Implementation

  24
  • 9.1 Application Information

    24
  • 9.2 Typical Application

    24
    • 9.2.1 Design Requirements

      24
    • 9.2.2 Detailed Design Procedure

      24
    • 9.2.3 Application Curves

      32
• 10 Power Supply Recommendation

  35
• 11 Layout

  36
  • 11.1 Safe Operating Area

    36
  • 11.2 Layout Guidelines

    37
  • 11.3 Layout Examples

    37
    • 11.3.1 Estimated Circuit Area

      37
• 12 Device and Documentation Support

  38
  • 12.1 Trademarks

    38
  • 12.2 Electrostatic Discharge Caution

    38
  • 12.3 Glossary

    38
• 13 Mechanical, Packaging, and Orderable Information

  38