ZHCSUB8V June   1976  – February 2025

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 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: UA78M33 (Both Legacy and New Chip)
    6. 5.6  Electrical Characteristics: UA78M05 (Both Legacy and New Chip)
    7. 5.7  Electrical Characteristics: UA78M06C (Legacy Chip Only)
    8. 5.8  Electrical Characteristics: UA78M08C (Legacy Chip Only)
    9. 5.9  Electrical Characteristics: UA78M09 (Both Legacy and New Chip)
    10. 5.10 Electrical Characteristics: UA78M10  (Both Legacy and New Chip)
    11. 5.11 Electrical Characteristics: UA78M12  (Both Legacy and New Chip)
    12. 5.12 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Current Limit
      2. 6.3.2 Dropout Voltage (VDO)
      3. 6.3.3 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input and Output Capacitor Requirements
        2. 7.2.2.2 Power Dissipation (PD)
        3. 7.2.2.3 Estimating Junction Temperature
        4. 7.2.2.4 External Capacitor Requirements
        5. 7.2.2.5 Overload Recovery
        6. 7.2.2.6 Reverse Current
        7. 7.2.2.7 Polarity Reversal Protection
      3. 7.2.3 Application Curves
    3. 7.3 System Examples
      1. 7.3.1 Positive Regulator in Negative Configuration
      2. 7.3.2 Current Limiter Circuit
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Evaluation Module
      2. 8.1.2 Device Nomenclature
    2. 8.2 接收文档更新通知
    3. 8.3 支持资源
    4. 8.4 Trademarks
    5. 8.5 静电放电警告
    6. 8.6 术语表
  10. 9 Revision History
  11. 10Mechanical, 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

3 说明

UA78M 固定电压集成电路稳压器适用于各种应用。UA78M 可用于板级稳压，以减弱与单点稳压相关的相关的后稳压噪声和分布问题。UA78M 能够提供高达 500mA 的输出电流。此外，UA78M 无需外部元件即可在整个负载电流范围内稳定运行。该稳压器的内部电流限制和热关断功能可避免器件发生过载。

UA78M 的额定结温范围为 –40°C 至 +125°C。本文将通篇说明新芯片和旧芯片的器件性能。有关更多详细信息，请参阅器件命名规则 表。

封装信息
器件型号 封装(1) 封装尺寸(2)
UA78M DCY（SOT-223，3） 6.5mm × 7mm
KVU（TO-252，3） 6.6mm × 10.11mm
(1) 如需更多信息，请参阅机械、封装和可订购信息。
(2) 封装尺寸（长 × 宽）为标称值，并包括引脚（如适用）。

 

 

uA78M 简化版原理图简化版原理图