ZHCSEI6 January   2016 LM5140-Q1

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 简化电路原理图
  5. 5 修订历史记录
  6. 6 Pin Configuration and Functions
  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  High Voltage Start-up Regulator
      2. 8.3.2  VCC Regulator
      3. 8.3.3  Oscillator
      4. 8.3.4  SYNIN and SYNOUT
      5. 8.3.5  Enable
      6. 8.3.6  Power Good
      7. 8.3.7  Output Voltage
      8. 8.3.8  Minimum Output Voltage Adjustment
      9. 8.3.9  Current Sense
      10. 8.3.10 DCR Current Sensing
      11. 8.3.11 Error Amplifier and PWM Comparator
      12. 8.3.12 Slope Compensation
    4. 8.4 Device Functional Modes
      1. 8.4.1 Hiccup Mode Current Limiting
      2. 8.4.2 Standby Mode
      3. 8.4.3 Soft-Start
      4. 8.4.4 Diode Emulation
      5. 8.4.5 High and low-side Drivers
  9. 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  Inductor Calculation
        2. 9.2.2.2  Current Sense Resistor
        3. 9.2.2.3  Output Capacitor
        4. 9.2.2.4  Input Filter
        5. 9.2.2.5  EMI Filter Design
        6. 9.2.2.6  MOSFET Selection
        7. 9.2.2.7  Driver Slew Rate Control
        8. 9.2.2.8  Sub-Harmonic Oscillation
        9. 9.2.2.9  Control Loop
        10. 9.2.2.10 Error Amplifier
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Procedure
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 器件支持
    2. 12.2 社区资源
    3. 12.3 商标
    4. 12.4 静电放电警告
    5. 12.5 Glossary
  13. 13机械、封装和可订购信息

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

10 Power Supply Recommendations

The LM5140EVM was designed to operate over an input voltage supply range between 3.8 V and 42 V. This input supply must be well regulated. If the power source is located more than a few inches from the LM5140-Q1 EVM, additional bulk capacitance and ceramic bypass capacitors may be required at the power supply input. An electrolytic capacitor with a value of 47 µF is typically a good choice.
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