ZHCSOM1K April   2006  – December 2024 LP2950 , LP2951

PRODUCTION DATA  

  1.   1
  2. 特性
  3. 应用
  4. 说明
  5. Pin Configuration and Functions
  6. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics (Both Legacy and New Chip)
    6. 5.6 Timing Requirements (New Chip only)
    7. 5.7 Typical Characteristics
  7. Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Output Enable
      2. 6.3.2 Dropout Voltage
      3. 6.3.3 Current Limit
      4. 6.3.4 Undervoltage Lockout (UVLO)
      5. 6.3.5 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Shutdown Mode
  8. Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Reverse Current
      2. 7.1.2 Input and Output Capacitor Requirements
      3. 7.1.3 Estimating Junction Temperature
      4. 7.1.4 Power Dissipation (PD)
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
        1. 7.2.1.1 Recommended Capacitor Types
          1. 7.2.1.1.1 Recommended Capacitors for the Legacy Chip
            1. 7.2.1.1.1.1 ESR Range (Legacy Chip)
          2. 7.2.1.1.2 Recommended Capacitors for the New Chip
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Feedback Resistor Selection
        2. 7.2.2.2 Feedforward Capacitor
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
    2. 8.2 接收文档更新通知
    3. 8.3 Device Nomenclature
    4. 8.4 Documentation Support
      1. 8.4.1 Related Documentation
    5. 8.5 支持资源
    6. 8.6 Trademarks
    7. 8.7 静电放电警告
    8. 8.8 术语表
  10. Revision History
  11. 10Mechanical, Packaging, and Orderable Information

特性

  • 宽输入电压范围
    • VIN 范围:2V 至 30V
  • 宽输出电压范围 VOUT
    • 固定电压:3V(旧芯片)、3.3V、5.0V
    • 可调节电压:1.2V 至 29V
  • 输出电流:100mA
  • VOUT 精度:
    • 根据线路、负载和温度 ±2%(旧芯片)
    • 根据线路、负载和温度 ±1%(新芯片)
  • 静态电流 IQ(新芯片):50μA(典型值)
  • 低压降(新芯片):340mV(典型值)
  • 输出电流限制和热关断
  • 在各种陶瓷输出电容值范围内可保持稳定
    • COUT 范围:1μF 至 100μF(新芯片)
    • ESR 范围:0 至 2Ω(新芯片)
  • 工作结温:-40°C 至 125°C
  • 封装选项:
    • LP(3 引脚 TO-92)
    • D(8 引脚 SOIC)
    • DRG(8 引脚 WSON)