ZHCSNR4B May   2021  – April 2022 TPS25946

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 Revision History
  5. 5 Device Comparison Table
  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 Timing Requirements
    7. 7.7 Switching Characteristics
      1.      15
    8. 7.8 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 Undervoltage Lockout (UVLO and UVP)
      2. 8.3.2 Overvoltage Lockout (OVLO)
      3. 8.3.3 Inrush Current, Overcurrent, and Short-Circuit Protection
        1. 8.3.3.1 Slew Rate (dVdt) and Inrush Current Control
        2. 8.3.3.2 Active Current Limiting
        3. 8.3.3.3 Short-Circuit Protection
      4. 8.3.4 Analog Load Current Monitor
      5. 8.3.5 Reverse Current Protection
      6. 8.3.6 Overtemperature Protection (OTP)
      7. 8.3.7 Fault Response and Indication (FLT)
      8. 8.3.8 Power Good Indication (PG)
      9. 8.3.9 Input Supply Good Indication (SPLYGD)
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Single Device, Self-Controlled
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Device Selection
        2. 9.2.2.2 Setting Overvoltage Threshold
        3. 9.2.2.3 Setting Output Voltage Rise Time (tR)
        4. 9.2.2.4 Setting Power Good Assertion Threshold
        5. 9.2.2.5 Setting Overcurrent Threshold (ILIM)
        6. 9.2.2.6 Setting Overcurrent Blanking Interval (tITIMER)
        7. 9.2.2.7 Selecting External Bias Resistor (R5)
        8. 9.2.2.8 Selecting External Diode (D1)
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
    1. 10.1 Transient Protection
    2. 10.2 Output Short-Circuit Measurements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 接收文档更新通知
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable 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

1 特性

  • 宽工作输入电压范围：2.7V 至 23V
    • 绝对最大值为 28V
  • 具有低导通电阻的集成式背对背 FET：RON = 28.3 mΩ（典型值）
    • ON 状态期间的双向电流流动
    • OFF 状态期间的反向电流阻断
  • 快速过压保护
    • 可调节过压锁定 (OVLO)，响应时间为 1.2 μs（典型值）
  • 正向过流保护，具有负载电流监控器输出 (ILM)
    • 有效电流限制响应
    • 可调节阈值 (ILIM)：0.5 A 至 6 A
      • ILIM > 1A 时精度为 ±10%
    • 可调瞬态消隐计时器 (ITIMER)，支持高达 2 x ILIM 的峰值电流
    • 输出负载电流监控精度：±6% (IOUT ≥ 1A)
  • 在 OUT 引脚上通过快速跳变响应实现短路保护
    • 响应时间为 500 ns（典型值）
    • 可调节 (2 × ILIM)阈值和固定阈值
  • 带有可调节欠压锁定阈值 (UVLO) 的高电平有效使能输入
  • 可调节的输出压摆率控制 (dVdt)
  • 过热保护
  • 数字指示选项：
    • 具有可调节阈值 (PGTH) 的电源正常状态指示 (PG) 或
    • 电源良好 (SPLYGD) 和故障 (FLT) 指示
  • UL 2367 认证
    • 文件编号 E339631

    • RILM ≥ 549Ω

  • 获得 IEC 62368-1 CB 认证
  • 小尺寸：QFN 2mm × 2mm，0.45mm 间距