ZHCSIN4B August   2018  – June 2021 LM5146-Q1

PRODUCTION DATA  

1. 1 特性
2. 2 应用
3. 3 说明
4. 4 Revision History
5. 5 说明（续）
6. 6 Pin Configuration and Functions
   1. 6.1 Wettable Flanks
7. 7 Specifications
   1. 7.1 Absolute Maximum Ratings
   2. 7.2 ESD Ratings 
   3. 7.3 Recommended Operating Conditions
   4. 7.4 Thermal Information
   5. 7.5 Electrical Characteristics
   6. 7.6 Switching Characteristics
   7. 7.7 Typical Characteristics
8. 8 Detailed Description
   1. 8.1 Overview
   2. 8.2 Functional Block Diagram
   3. 8.3 Feature Description
      1. 8.3.1  Input Range (VIN)
      2. 8.3.2  Output Voltage Setpoint and Accuracy (FB)
      3. 8.3.3  High-Voltage Bias Supply Regulator (VCC)
      4. 8.3.4  Precision Enable (EN/UVLO)
      5. 8.3.5  Power Good Monitor (PGOOD)
      6. 8.3.6  Switching Frequency (RT, SYNCIN)
         1. 8.3.6.1 Frequency Adjust
         2. 8.3.6.2 Clock Synchronization
      7. 8.3.7  Configurable Soft Start (SS/TRK)
         1. 8.3.7.1 Tracking
      8. 8.3.8  Voltage-Mode Control (COMP)
      9. 8.3.9  Gate Drivers (LO, HO)
      10. 8.3.10 Current Sensing and Overcurrent Protection (ILIM)
      11. 8.3.11 OCP Duty Cycle Limiter
   4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
      4. 8.4.4 Diode Emulation Mode
      5. 8.4.5 Thermal Shutdown
9. 9 Application and Implementation
   1. 9.1 Application Information
      1. 9.1.1 Design and Implementation
      2. 9.1.2 Power Train Components
         1. 9.1.2.1 Inductor
         2. 9.1.2.2 Output Capacitors
         3. 9.1.2.3 Input Capacitors
         4. 9.1.2.4 Power MOSFETs
      3. 9.1.3 Control Loop Compensation
      4. 9.1.4 EMI Filter Design
   2. 9.2 Typical Applications
      1. 9.2.1 Design 1 – 12-A High-Efficiency Synchronous Buck DC/DC Regulator for Automotive Applications
         1. 9.2.1.1 Design Requirements
         2. 9.2.1.2 Detailed Design Procedure
         3. 9.2.1.3 Custom Design With WEBENCH® Tools
         4. 9.2.1.4 Custom Design With Excel Quickstart Tool
         5. 9.2.1.5 Application Curves
      2. 9.2.2 Design 2 – High Density, 12-V, 8-A Rail From 48-V Automotive Battery Power
         1. 9.2.2.1 Design Requirements
         2. 9.2.2.2 Detailed Design Procedure
         3. 9.2.2.3 Application Curves
10. 10Power Supply Recommendations
11. 11Layout
    1. 11.1 Layout Guidelines
       1. 11.1.1 Power Stage Layout
       2. 11.1.2 Gate Drive Layout
       3. 11.1.3 PWM Controller Layout
       4. 11.1.4 Thermal Design and Layout
       5. 11.1.5 Ground Plane Design
    2. 11.2 Layout Example
12. 12Device and Documentation Support
    1. 12.1 Device Support
       1. 12.1.1 第三方产品免责声明
       2. 12.1.2 Development Support
          1. 12.1.2.1 Custom Design With WEBENCH® Tools
    2. 12.2 Documentation Support
       1. 12.2.1 Related Documentation
          1. 12.2.1.1 PCB Layout Resources
          2. 12.2.1.2 Thermal Design Resources
    3. 12.3 接收文档更新通知
    4. 12.4 支持资源
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
13. 13Mechanical, Packaging, and Orderable Information