ZHCSPF6B february   2022  – may 2023 LMQ66410 , LMQ66420 , LMQ66430

PRODUCTION DATA  

1.   1
2. 1 特性
3. 2 應用
4. 3 說明
5. 4 Revision History
6. 5 Device Comparison Table
7. 6 Pin Configuration and Functions
8. 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 System Characteristics
   7. 7.7 Typical Characteristics
9. 8 Detailed Description
   1. 8.1 Overview
   2. 8.2 Functional Block Diagram
   3. 8.3 Feature Description
      1. 8.3.1  Enable, Start-Up, and Shutdown
      2. 8.3.2  Adjustable Switching Frequency (with RT)
      3. 8.3.3  Power-Good Output Operation
      4. 8.3.4  Internal LDO, VCC, and VOUT/FB Input
      5. 8.3.5  Bootstrap Voltage and VBOOT-UVLO (BOOT Terminal)
      6. 8.3.6  Output Voltage Selection
      7. 8.3.7  Spread Spectrum
      8. 8.3.8  Soft Start and Recovery from Dropout
         1. 8.3.8.1 Recovery from Dropout
      9. 8.3.9  Current Limit and Short Circuit
      10. 8.3.10 Thermal Shutdown
      11. 8.3.11 Input Supply Current
   4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Standby Mode
      3. 8.4.3 Active Mode
         1. 8.4.3.1 CCM Mode
         2. 8.4.3.2 Auto Mode – Light Load Operation
            1. 8.4.3.2.1 Diode Emulation
            2. 8.4.3.2.2 Frequency Reduction
         3. 8.4.3.3 FPWM Mode – Light Load Operation
         4. 8.4.3.4 Minimum On-Time (High Input Voltage) Operation
         5. 8.4.3.5 Dropout
10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
       1. 9.2.1 Synchronous Buck Regulator at 400 kHz
       2. 9.2.2 Design Requirements
       3. 9.2.3 Detailed Design Procedure
          1. 9.2.3.1  Choosing the Switching Frequency
          2. 9.2.3.2  Setting the Output Voltage
             1. 9.2.3.2.1 VOUT / FB for Adjustable Output
          3. 9.2.3.3  Inductor Selection
          4. 9.2.3.4  Output Capacitor Selection
          5. 9.2.3.5  Input Capacitor Selection
          6. 9.2.3.6  CBOOT
          7. 9.2.3.7  VCC
          8. 9.2.3.8  CFF Selection
          9. 9.2.3.9  External UVLO
          10. 9.2.3.10 Maximum Ambient Temperature
       4. 9.2.4 Application Curves
    3. 9.3 Best Design Practices
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
       1. 9.5.1 Layout Guidelines
          1. 9.5.1.1 Ground and Thermal Considerations
       2. 9.5.2 Layout Example
11. 10Device and Documentation Support
    1. 10.1 Device Support
       1. 10.1.1 第三方產品免責聲明
       2. 10.1.2 Device Nomenclature
    2. 10.2 Documentation Support
       1. 10.2.1 Related Documentation
    3. 10.3 接收文檔更新通知
    4. 10.4 支持資源
    5. 10.5 Trademarks
    6. 10.6 靜電放電警告
    7. 10.7 術語表
12. 11Mechanical, Packaging, and Orderable Information

LMQ664x0 具有集成式 V_IN 旁路和 C_BOOT 電容器的 36V、1A/2A/3A超小型同步降壓轉換器