SNVSB42A December   2017  – December 2025 LM25576-Q1

PRODUCTION DATA  

  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 Resistance Characteristics
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 High Voltage Start-Up Regulator
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown and Stand-by Mode
      2. 6.4.2 Oscillator and Sync Capability
      3. 6.4.3 Error Amplifier and PWM Comparator
      4. 6.4.4 RAMP Generator
      5. 6.4.5 Maximum Duty Cycle and Input Drop-Out Voltage
      6. 6.4.6 Current Limit
      7. 6.4.7 Soft-Start
      8. 6.4.8 Boost Pin
      9. 6.4.9 Thermal Protection
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Design Requirements
      2. 7.1.2 Detailed Design Procedure
        1. 7.1.2.1  R3 (RT)
        2. 7.1.2.2  Inductor (L1)
        3. 7.1.2.3  C3 (CRAMP)
        4. 7.1.2.4  C9, C10
        5. 7.1.2.5  D1
        6. 7.1.2.6  C1, C2
        7. 7.1.2.7  C8
        8. 7.1.2.8  C7
        9. 7.1.2.9  C4
        10. 7.1.2.10 R5, R6
        11. 7.1.2.11 R1, R2, C12
        12. 7.1.2.12 R7, C11
        13. 7.1.2.13 R4, C5, C6
      3. 7.1.3 Bias Power Dissipation Reduction
    2. 7.2 Typical Application
      1. 7.2.1 Typical Schematic for High Frequency (1MHz) Application
      2. 7.2.2 Typical Schematic for Buck and Boost (Inverting) Application
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 PCB Layout and Thermal Considerations
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Developmental Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

9 Revision History

Changes from Revision * (December 2017) to Revision A (December 2025)

  • Updated the numbering format for tables, figures, and cross-references throughout the documentGo
  • Added charged-device model specification to ESD Ratings section with accompanying table notesGo
  • Added Thermal Resistance CharacteristicsGo
  • Updated Bias Current (Iin) from: 3.4mA to: 2mAGo
  • Updated Shutdown Current (Iin) from: 57uA to: 48uAGo
  • Updated BOOST UVLO Hysteresis from: 0.56V to: 0.8V.Go
  • Updated FB Bias Current from: 17nA to: 10nA.Go
  • Updated section title from: External Components to: Design RequirementsGo
  • Added Detailed Design Procedure sectionGo
  • Added Application Curves sectionGo
  • Added Power Supply RecommendationsGo
  • Moved Layout to Application and Implementation sectionGo