SNOSDL7A January   2025  – December 2025 LMG3650R070

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1 Switching Parameters
      1. 6.1.1 Turn-On Times
      2. 6.1.2 Turn-Off Times
      3. 6.1.3 Drain-Source Turn-On and Turn-off Slew Rate
      4. 6.1.4 Zero-Voltage Detection Times (LMG3656R070 only)
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
      1. 7.2.1 LMG3650R070 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Drive Strength Adjustment
      2. 7.3.2 VDD Supply
      3. 7.3.3 Overcurrent and Short-Circuit Protection
      4. 7.3.4 Overtemperature Protection
      5. 7.3.5 UVLO Protection
      6. 7.3.6 Fault Reporting
      7. 7.3.7 Auxiliary LDO (LMG3651R070 Only)
      8. 7.3.8 Zero-Voltage Detection (ZVD) (LMG3656R070 Only)
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Detailed Design Procedure
        1. 8.2.1.1 Slew Rate Selection
        2. 8.2.1.2 Signal Level-Shifting
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 Using an Isolated Power Supply
      2. 8.3.2 Using a Bootstrap Diode
        1. 8.3.2.1 Diode Selection
        2. 8.3.2.2 Managing the Bootstrap Voltage
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Solder-Joint Reliability
        2. 8.4.1.2 Power-Loop Inductance
        3. 8.4.1.3 Signal-Ground Connection
        4. 8.4.1.4 Bypass Capacitors
        5. 8.4.1.5 Switch-Node Capacitance
        6. 8.4.1.6 Signal Integrity
        7. 8.4.1.7 High-Voltage Spacing
        8. 8.4.1.8 Thermal Recommendations
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1.     PACKAGE OPTION ADDENDUM
    2. 11.1 Tape and Reel Information
    3. 11.2 Mechanical, Packaging, and Orderable Information

7.3.7 Auxiliary LDO (LMG3651R070 Only)

A 5V voltage regulator inside LMG365xR070 is used to supply external loads, such as digital isolators for the high-side drive signal. The digital outputs of LMG365xR070 use this 5V rail as a voltage supply. A capacitor is not required for stability, but transient response is poor if no external capacitor is provided. If the application uses the LDO5V pin to supply external circuits, TI recommends using a capacitor of at least 0.1μF for improved transient response. Use a larger capacitor for further transient response improvement. Verify that the decoupling capacitor is a low-ESR ceramic type. Capacitances above 0.47μF slow down the start-up time of the LMG365xR070, due to the ramp-up time of the 5V rail.