SNVSC77A December   2024  – March 2025 LM5125-Q1

ADVANCE INFORMATION  

  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 Timing Requirements
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Device Configuration (CFG0-pin, CFG1-pin, CFG2-pin)
      2. 6.3.2  Device and Phase Enable/Disable (UVLO/EN, EN2)
      3. 6.3.3  Switching Frequency and Synchronization (SYNCIN)
      4. 6.3.4  Dual Random Spread Spectrum (DRSS)
      5. 6.3.5  Operation Modes (BYPASS, DEM, FPWM)
      6. 6.3.6  Dual-phase Operation
      7. 6.3.7  BIAS (BIAS-pin)
      8. 6.3.8  Soft Start (SS-pin)
      9. 6.3.9  VOUT Programming (VOUT, ATRK, DTRK)
      10. 6.3.10 Protections
      11. 6.3.11 VOUT Overvoltage Protection (OVP)
      12. 6.3.12 Thermal Shutdown (TSD)
      13. 6.3.13 Power-Good Indicator (PGOOD-pin)
      14. 6.3.14 Current Sensing, Peak Current Limit, and Slope Compensation (CSP1, CSP2, CSN1, CSN2)
      15. 6.3.15 Current Sense Setting (CSP1, CSP2, CSN1, CSN2)
      16. 6.3.16 Input Current Limit and Monitoring (ILIM, IMON, DLY)
      17. 6.3.17 Signal Deglitch Overview
      18. 6.3.18 MOSFET Drivers, Integrated Boot Diode, and Hiccup Mode Fault Protection (LOx, HOx, HBx-pin)
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown State
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Feedback Compensation
    2. 7.2 Typical Application
      1. 7.2.1 Application
      2. 7.2.2 Design Requirements
      3. 7.2.3 Detailed Design Procedure
        1. 7.2.3.1  Determine the Total Phase Number
        2. 7.2.3.2  Determining the Duty Cycle
        3. 7.2.3.3  Timing Resistor RT
        4. 7.2.3.4  Inductor Selection Lm
        5. 7.2.3.5  Current Sense Resistor Rcs
        6. 7.2.3.6  Current Sense Filter RCSFP, RCSFN, CCS
        7. 7.2.3.7  Low-Side Power Switch QL
        8. 7.2.3.8  High-Side Power Switch QH and Additional Parallel Schottky Diode
        9. 7.2.3.9  Snubber Components
        10. 7.2.3.10 Vout Programming
        11. 7.2.3.11 Input Current Limit (ILIM/IMON)
        12. 7.2.3.12 UVLO Divider
        13. 7.2.3.13 Soft Start
        14. 7.2.3.14 CFG Settings
        15. 7.2.3.15 Output Capacitor Cout
        16. 7.2.3.16 Input Capacitor Cin
        17. 7.2.3.17 Bootstrap Capacitor
        18. 7.2.3.18 VCC Capacitor CVCC
        19. 7.2.3.19 BIAS Capacitor
        20. 7.2.3.20 VOUT Capacitor
        21. 7.2.3.21 Loop Compensation
      4. 7.2.4 Application Curves
        1. 7.2.4.1 Efficiency
        2. 7.2.4.2 Steady State Waveforms
        3. 7.2.4.3 Step Load Response
        4. 7.2.4.4 Sync Operation
        5. 7.2.4.5 Thermal Performance
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    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
    1. 10.1 Tape and Reel Information
    2.     86

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報
Data Sheet

LM5125-Q1, Wide-VIN, Dual-Phase, Automotive, Boost Controller With VOUT Tracking