SLVSGL3 April   2022 TPSM63603E

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 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  System Characteristics
    7. 7.7  Typical Characteristics
    8. 7.8  Typical Characteristics — VIN = 12 V
    9. 7.9  Typical Characteristics — VIN = 24 V
    10. 7.10 Typical Characteristics — VIN = 36 V
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Input Voltage Range
      2. 8.3.2  Adjustable Output Voltage (FB)
      3. 8.3.3  Input Capacitors
      4. 8.3.4  Output Capacitors
      5. 8.3.5  Switching Frequency (RT)
      6. 8.3.6  Output ON and OFF Enable (EN/SYNC) and VIN UVLO
      7. 8.3.7  Frequency Synchronization (EN/SYNC)
      8. 8.3.8  Spread Spectrum
      9. 8.3.9  Power-Good Monitor (PG)
      10. 8.3.10 Adjustable Switch-Node Slew Rate (RBOOT and CBOOT)
      11. 8.3.11 Internal LDO, VCC Output, and VLDOIN Input
      12. 8.3.12 Overcurrent Protection (OCP)
      13. 8.3.13 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
  9. 9 Applications and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Design 1 — 3-A Synchronous Buck Regulator for Industrial Applications
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
          1. 9.2.1.2.1 Custom Design With WEBENCH® Tools
          2. 9.2.1.2.2 Output Voltage Setpoint
          3. 9.2.1.2.3 Switching Frequency Selection
          4. 9.2.1.2.4 Input Capacitor Selection
          5. 9.2.1.2.5 Output Capacitor Selection
          6. 9.2.1.2.6 Other Connections
        3. 9.2.1.3 Application Curves
        4. 9.2.1.4 Design 2 — Inverting Buck-Boost Regulator with a –5-V Output
          1. 9.2.1.4.1 Design Requirements
          2. 9.2.1.4.2 Detailed Design Procedure
            1. 9.2.1.4.2.1 Output Voltage Setpoint
            2. 9.2.1.4.2.2 IBB Maximum Output Current
            3. 9.2.1.4.2.3 Switching Frequency Selection
            4. 9.2.1.4.2.4 Input Capacitor Selection
            5. 9.2.1.4.2.5 Output Capacitor Selection
            6. 9.2.1.4.2.6 Other Connections
            7. 9.2.1.4.2.7 EMI
              1. 9.2.1.4.2.7.1 EMI Plots
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
      1. 11.2.1 Package Specifications
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
      2. 12.1.2 Development Support
        1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
      1. 12.2.1 Related Documentation
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Support Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.10 Adjustable Switch-Node Slew Rate (RBOOT and CBOOT)

Adjust the switch-node slew rate of the TPSM63603E to slow the switch-node voltage rise time and improve EMI performance at high frequencies. However, slowing the rise time decreases efficiency. Take care to balance the improved EMI versus the decreased efficiency.

Internal to the device, a 100-Ω bootstrap resistor is connected between the RBOOT and CBOOT pins as shown in Figure 8-7. Leaving these pins open incorporates the 100-Ω resistor into the BOOT circuit, slowing the SW voltage slew rate and optimizing EMI. However, if improved EMI is not required, connecting RBOOT to CBOOT shorts the internal resistor, resulting in higher efficiency. Placing a resistor across RBOOT and CBOOT allows adjustment of the internal resistor to balance EMI and efficiency.

Figure 8-7 Internal BOOT Resistor