SNAS875B February   2025  – January 2026 LMR60430-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable and Undervoltage Lockout (UVLO)
      2. 7.3.2 Soft Start and Recovery from Dropout
      3. 7.3.3 Frequency Selection With RT
      4. 7.3.4 MODE/SYNC Pin Control
      5. 7.3.5 Output Voltage Selection
      6. 7.3.6 Current Limit
      7. 7.3.7 Hiccup Mode
      8. 7.3.8 Power-Good Function
      9. 7.3.9 Spread Spectrum
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown
      2. 7.4.2 Active Mode
        1. 7.4.2.1 Continuous Conduction Mode (CCM)
        2. 7.4.2.2 Auto Mode - Light Load Operation
        3. 7.4.2.3 FPWM Operation - Light Load Operation
        4. 7.4.2.4 Minimum On-Time
        5. 7.4.2.5 Dropout
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Switching Frequency Selection
        2. 8.2.2.2 Inductor Selection
        3. 8.2.2.3 Output Capacitor Selection
        4. 8.2.2.4 Input Capacitor Selection
        5. 8.2.2.5 Bootstrap Capacitor (CBOOT) Selection
        6. 8.2.2.6 FB Voltage Divider for Adjustable Output Voltages
          1. 8.2.2.6.1 Feedforward Capacitor (CFF) Selection
        7. 8.2.2.7 RPG - PG Pullup Resistor
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Ground and Thermal Plane Considerations
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Device Nomenclature
    2. 9.2 Documentation Support
      1. 9.2.1 Related Documentation
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

10 Revision History

Changes from Revision A (June 2025) to Revision B (January 2026)

  • Added ZEN 1 switcher terminology in the document title and the Features listGo
  • Updated shutdown current from 0.65μA to 0.7μA in the Features sectionGo
  • Changed document status from Production Mix to Production DataGo
  • Added ultra-compact PCB layout image to the front pageGo
  • Added TM to HotRod in Section 3 and Section 7.1 Go
  • Deleted the orderable part number LMR604301SRAKRQ1 from the list of 'A' variant devicesGo
  • Added a table with orderable part numbers for 'B' variant devicesGo
  • Added a foot note to cover the transient voltage specification on the SW pin to the Absolute Maximum Ratings tableGo
  • Added RT to the Recommended Operating Conditions tableGo
  • Added specifications for 'B' variant devices in the Electrical Characteristics tableGo
  • Updated IQ-SD from 0.65µA (typ) to 0.7µA (typ) in the Electrical Characteristics tableGo
  • Updated RDS-ON-HS from 65mΩ to 60mΩ in the Electrical Characteristics table Go
  • Added additional curves to Typical Characteristics sectionGo
  • Updated the RT equation and the curve to include 'B' variant devicesGo
  • Added a paragraph and figure showing variation of high-side current limit with duty cycleGo
  • Changed the typical switching frequency spread of spread spectrum from 16% to 18%Go
  • Added two more bullet points to the conditions that turn spread spectrum offGo
  • Deleted note from Figure 8-1 and updated the figure to include Option 4 on MODE/SYNC pinGo
  • Added a column mentioning RT values for the 'B' variant devices to the Table 8-2 tableGo
  • Updated RFBT and RFBB for VOUT = 3.8V in Table 8-2 Go
  • Updated Output Capacitor Selection section to simplify output capacitor selection processGo
  • Added additional curves to the Application Curves section and split efficiency curves into FPWM and Auto modesGo
  • Added a figure describing device naming nomenclatureGo

Changes from Revision * (February 2025) to Revision A (June 2025)

  • Changed the document status from Advance Information to Production DataGo