SLCS144E July   2004  – October 2014 LM317L

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling 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
        1. 9.2.2.1 Input Capacitor
        2. 9.2.2.2 Output Capacitor
        3. 9.2.2.3 Feedback Resistors
        4. 9.2.2.4 Adjustment Terminal Capacitor
        5. 9.2.2.5 Design Options and Parameters
        6. 9.2.2.6 Output Voltage
        7. 9.2.2.7 Ripple Rejection
        8. 9.2.2.8 Input Short Protection
      3. 9.2.3 Application Curves
    3. 9.3 General Configurations
      1. 9.3.1 Regulator Circuit With Improved Ripple Rejection
      2. 9.3.2 0-V to 30-V Regulator Circuit
      3. 9.3.3 Precision Current-Limiter Circuit
      4. 9.3.4 Tracking Preregulator Circuit
      5. 9.3.5 Slow-Turn On 15-V Regulator Circuit
      6. 9.3.6 50-mA Constant-Current Battery-Charger Circuit
      7. 9.3.7 Current-Limited 6-V Charger
      8. 9.3.8 High-Current Adjustable Regulator
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 Electrostatic Discharge Caution
    3. 12.3 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|8
  • PK|3
  • PW|8
  • LP|3
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11 Layout

11.1 Layout Guidelines

  • It is recommended that the input pin be bypassed to ground with a bypass-capacitor.
  • The optimum placement is closest to the VIN of the device and GND of the system. Care must be taken to minimize the loop area formed by the bypass-capacitor connection, the VIN pin, and the GND pin of the system.
  • For operation at full-rated load, it is recommended to use wide trace lengths to eliminate IR drop and heat dissipation.

11.2 Layout Example

layout_slvs297.gifFigure 11. Layout Diagram