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

1 Features

  • Output Voltage Range Adjustable 1.25 V to 32 V When Used With External Resistor Divider
  • Output Current Capability of 100 mA
  • Input Regulation Typically 0.01% Per Input-Voltage Change
  • Output Regulation Typically 0.5%
  • Ripple Rejection Typically 80 dB
  • For Higher Output Current Requirements, See LM317M (500 mA) and LM317 (1.5 A)

2 Applications

  • Electronic Points of Sale
  • Medical, Health, and Fitness Applications
  • Printers
  • Appliances and White Goods
  • TV Set-Top Boxes

3 Description

The LM317L device is an adjustable, 3-terminal, positive-voltage regulator capable of supplying 100 mA over an output-voltage range of 1.25 V to 32 V. It is exceptionally easy to use and requires only two external resistors to set the output voltage.

Device Information

PART NUMBER PACKAGE BODY SIZE (NOM)
LM317L SOIC (8) 4.90 mm × 3.91 mm
TO-92 (3) 4.30 mm × 4.30 mm
SOT-89 (3) 4.50 mm × 2.50 mm
TSSOP (8) 3.00 mm × 4.40 mm

4 Simplified Schematic

appin1_lcs144.gif