ZHCSSE8C may   2018  – august 2023 LV3842

ADVANCE INFORMATION  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  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 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 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 Fixed Frequency Peak Current Mode Control
      2. 8.3.2 Adjustable Output Voltage
      3. 8.3.3 Enable
      4. 8.3.4 Minimum ON-Time, Minimum OFF-Time and Frequency Foldback
      5. 8.3.5 Bootstrap Voltage
      6. 8.3.6 Overcurrent and Short-Circuit Protection
      7. 8.3.7 Soft Start
      8. 8.3.8 Thermal Shutdown
    4. 8.4 Device Functional Modes
      1. 8.4.1 Shutdown Mode
      2. 8.4.2 Active Mode
      3. 8.4.3 CCM Mode
      4. 8.4.4 Light-Load Operation (PFM Version)
      5. 8.4.5 Light-Load Operation (FPWM Version)
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Voltage Set-Point
        2. 9.2.2.2 Inductor Selection
        3. 9.2.2.3 Output Capacitor Selection
        4. 9.2.2.4 Input Capacitor Selection
        5. 9.2.2.5 Bootstrap Capacitor
        6. 9.2.2.6 Undervoltage Lockout Set-Point
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Compact Layout for EMI Reduction
      3. 9.4.3 Feedback Resistors
      4. 9.4.4 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Tape and Reel Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

9.2.3 Application Curves

Unless otherwise specified the following conditions apply: VIN = 12 V, VOUT = 5 V, fSW = 1.1 MHz, L = 18 µH, COUT = 22 µF, TA = 25 °C

GUID-FEE1DD16-2AEE-4314-9E83-E0BBF4E2CC66-low.gif
IOUT = 0 mAFPWM Version
Figure 9-2 Ripple at No Load
GUID-6DC1BFDF-DFEB-4360-BB57-1E3C3AE52528-low.gif
IOUT = 600 mAFPWM Version
Figure 9-4 Start-up by VIN
GUID-E4E7568B-F1FD-4612-8436-0FF2468BB00C-low.gif
IOUT = 0 to 600 mA, 100 mA / µsFPWM Version
Figure 9-6 Load Transient
GUID-C788B78E-339F-432D-A3DF-CA715E5B89B5-low.gif
IOUT = 0 mA to shortFPWM Version
Figure 9-8 Short Protection
GUID-0FA92654-5CF5-450D-A35D-EE0C7392FC76-low.gif
IOUT = 600 mAFPWM Version
Figure 9-3 Ripple at Full Load
GUID-B186839C-B4A1-483C-8B18-4FA99FEFB493-low.gif
IOUT = 600 mAFPWM Version
Figure 9-5 Start-up by EN
GUID-DA7F8E77-2445-4178-A499-7A04DFB0E4EC-low.gif
VIN = 12 V to 30 V, 0.18 V / µsIOUT = 600 mAFPWM Version
Figure 9-7 Line Transient
GUID-F105C718-F919-474D-B24C-5E758ADA31CD-low.gif
A.
IOUT = short to 0 mAFPWM Version
Figure 9-9 Short Recovery