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

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5.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)(1)
MIN TYP MAX UNIT
VIN Input voltage UA78M33C , UA78M33I (Legacy chip) 5.3 25 V
UA78M33C, UA78M33I (New chip) 5.3 30
UA78M05C, UA78M05I (Legacy chip) 7 25
UA78M05C, UA78M05I (New chip) 7 30
UA78M06 (Legacy chip) 8 25
UA78M08 (Legacy chip) 10.5 25
UA78M09 (Legacy chip) 11.5 26
UA78M09 (New chip) 11.5 30
UA78M10 (Legacy chip) 12.5 28
UA78M10 (New chip) 12.5 30
UA78M12 (Legacy chip) 14.5 30
UA78M12 (New chip) 14.5 30
CIN(2) Input capacitor (3) 0.33 µF
COUT(2) Output capacitor (4) 0.1 470 µF
IO Output current 500 mA
TJ Operating junction temperature  UA78MxxC (Legacy chip) 0 125 °C
 UA78MxxI (Legacy chip) –40 125
 UA78MxxC , UA78MxxI (New chip) –40 125
(1) All voltages are with respect to GND.
(2) UA78M regulator does not need any external capacitors for LDO stability. 
(3) An input capacitor with value of 0.33 μF is recommended to counteract the effect of source resistance and inductance, which can in some cases cause symptoms of system level instability such as ringing or oscillation, especially in the presence of load transients.
(4) An output capacitor with value of 0.1 μF is recommended to improve the load and line transient performance of the UA78M regulator. The maximum output capacitor is guaranteed by design