ZHCSH33Y September   1997  – April 2020 LM317

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      电池充电器电路
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin 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 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 NPN Darlington Output Drive
      2. 8.3.2 Overload Block
      3. 8.3.3 Programmable Feedback
    4. 8.4 Device Functional Modes
      1. 8.4.1 Normal Operation
      2. 8.4.2 Operation With Low Input Voltage
      3. 8.4.3 Operation at Light Loads
      4. 8.4.4 Operation In Self Protection
  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
      3. 9.2.3 Application Curves
    3. 9.3 System Examples
      1. 9.3.1  0-V to 30-V Regulator Circuit
      2. 9.3.2  Adjustable Regulator Circuit With Improved Ripple Rejection
      3. 9.3.3  Precision Current-Limiter Circuit
      4. 9.3.4  Tracking Preregulator Circuit
      5. 9.3.5  1.25-V to 20-V Regulator Circuit With Minimum Program Current
      6. 9.3.6  Battery-Charger Circuit
      7. 9.3.7  50-mA Constant-Current Battery-Charger Circuit
      8. 9.3.8  Slow Turn-On 15-V Regulator Circuit
      9. 9.3.9  AC Voltage-Regulator Circuit
      10. 9.3.10 Current-Limited 6-V Charger Circuit
      11. 9.3.11 Adjustable 4-A Regulator Circuit
      12. 9.3.12 High-Current Adjustable Regulator Circuit
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 接收文档更新通知
    2. 12.2 支持资源
    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

3 说明

LM317 器件是一款可调节 3 端正电压稳压器，能够在 1.25V 至 37V 的输出电压范围内提供超过 1.5A 的电流。它仅需要使用两个外部电阻器来设置输出电压。此器件 具有 0.01% 的典型线性调整率和 0.1% 的典型负载调整率。它包含电流限制、热过载保护和安全工作区保护功能。即使“调节”端处于断开状态，过载保护功能仍然起作用。

器件信息(1)

器件型号 封装 封装尺寸（标称值）
LM317DCY SOT-223 (4) 6.50mm × 3.50mm
LM317KCS TO-220 (3) 10.16mm × 9.15mm
LM317KCT TO-220 (3) 10.16mm × 8.59mm
LM317KTT TO-263 (3) 10.16mm × 9.01mm
  1. 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。