SNVS814B June   2012  – June 2019 LMR10530

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Descriptions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Recommended Operating Ratings
    3. 6.3 Electrical Characteristics
    4. 6.4 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 Frequency Foldback
      2. 7.3.2 Load Step Response
      3. 7.3.3 Output Overvoltage Protection
      4. 7.3.4 Undervoltage Lockout
      5. 7.3.5 Current Limit
      6. 7.3.6 Soft Start/Shutdown
      7. 7.3.7 Thermal Shutdown
  8. 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 Custom Design With WEBENCH® Tools
        2. 8.2.1.2 Inductor Selection
        3. 8.2.1.3 Input Capacitor
        4. 8.2.1.4 Output Capacitor
        5. 8.2.1.5 Catch Diode
        6. 8.2.1.6 Output Voltage
        7. 8.2.1.7 Efficiency Estimation
      2. 8.2.2 Application Curve
      3. 8.2.3 Other System Examples
        1. 8.2.3.1 LMR10530X Design Example 1
        2. 8.2.3.2 LMR10530X Design Example 2
        3. 8.2.3.3 LMR10530Y Design Example 3
        4. 8.2.3.4 LMR10530Y Design Example 4
  9. 9 Layout
    1. 9.1 Layout Considerations
  10. 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 Receiving Notification of Documentation Updates
    3. 10.3 Community Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  11. 11Mechanical, Packaging, and Orderable Information
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.1 Frequency Foldback

The LMR10530 uses frequency foldback to help limit switch current and power dissipation during start-up, short-circuit and over load conditions by sensing if the feedback voltage is below 0.32 V (typical). The LMR10530 reduces the switching frequency from the nominal fixed value (1.5 MHz or 3 MHz) down to 400 kHz (LMR10530X) or 800 kHz (LMR10530Y) when the feedback voltage drops to 0 V. See Figure 11 plot in the Typical Characteristics section.