ZHCSCD8C April   2014  – April 2019 LM46002

PRODUCTION DATA.  

1. 1 特性
2. 2 应用
3. 3 说明
   1.     Device Images
      1.      简化原理图
      2.      辐射发射图 VIN = 24V，VOUT = 3.3V，FS= 500kHz，IOUT = 2A
4. 4 修订历史记录
5. 5 Pin Configuration and Functions
   1.     Pin Functions
6. 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 Timing Requirements
   7. 6.7 Switching Characteristics
   8. 6.8 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  Fixed-Frequency, Peak-Current-Mode-Controlled, Step-Down Regulator
      2. 7.3.2  Light Load Operation
      3. 7.3.3  Adjustable Output Voltage
      4. 7.3.4  Enable (ENABLE)
      5. 7.3.5  VCC, UVLO, and BIAS
      6. 7.3.6  Soft Start and Voltage Tracking (SS/TRK)
      7. 7.3.7  Switching Frequency (RT) and Synchronization (SYNC)
      8. 7.3.8  Minimum ON-Time, Minimum OFF-Time, and Frequency Foldback at Dropout Conditions
      9. 7.3.9  Internal Compensation and CFF
      10. 7.3.10 Bootstrap Voltage (BOOT)
      11. 7.3.11 Power Good (PGOOD)
      12. 7.3.12 Overcurrent and Short-Circuit Protection
      13. 7.3.13 Thermal Shutdown
   4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode
      2. 7.4.2 Standby Mode
      3. 7.4.3 Active Mode
      4. 7.4.4 CCM Mode
      5. 7.4.5 Light Load Operation
      6. 7.4.6 Self-Bias Mode
8. 8 Applications and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
         1. 8.2.2.1  Custom Design With WEBENCH® Tools
         2. 8.2.2.2  Output Voltage Setpoint
         3. 8.2.2.3  Switching Frequency
         4. 8.2.2.4  Input Capacitors
         5. 8.2.2.5  Inductor Selection
         6. 8.2.2.6  Output Capacitor Selection
         7. 8.2.2.7  Feed-Forward Capacitor
         8. 8.2.2.8  Bootstrap Capacitors
         9. 8.2.2.9  VCC Capacitor
         10. 8.2.2.10 BIAS Capacitors
         11. 8.2.2.11 Soft-Start Capacitors
         12. 8.2.2.12 Undervoltage Lockout Setpoint
         13. 8.2.2.13 PGOOD
      3. 8.2.3 Application Performance Curves
9. 9 Power Supply Recommendations
10. 10Layout
    1. 10.1 Layout Guidelines
       1. 10.1.1 Compact Layout for EMI Reduction
       2. 10.1.2 Ground Plane and Thermal Considerations
       3. 10.1.3 Feedback Resistors
    2. 10.2 Layout Example
11. 11器件和文档支持
    1. 11.1 器件支持
       1. 11.1.1 开发支持
          1. 11.1.1.1 使用 WEBENCH® 工具创建定制设计
    2. 11.2 接收文档更新通知
    3. 11.3 社区资源
    4. 11.4 商标
    5. 11.5 静电放电警告
    6. 11.6 术语表
12. 12机械、封装和可订购信息