SLVS297R April   2000  – May 2026 LM317M , LM317MQ

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 (Both Legacy and New Chip)
    6. 5.6 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 Applications 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 (Legacy Chip)
        2. 7.2.2.2  Input and Output Capacitor Requirements (New Chip)
        3. 7.2.2.3  Feedback Resistors
        4. 7.2.2.4  Adjustment Pin Capacitor
        5. 7.2.2.5  Protection Diodes
        6. 7.2.2.6  Overload Recovery
        7. 7.2.2.7  Estimating Junction Temperature
        8. 7.2.2.8  Polarity Reversal Protection
        9. 7.2.2.9  Reverse Current
        10. 7.2.2.10 Power Dissipation (PD)
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 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 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

4 Pin Configuration and Functions

LM317M LM317MQ DCY Package,4-Pin SOT-223(Top View)Figure 4-1 DCY Package,4-Pin SOT-223
(Top View)
LM317M LM317MQ KVU Package,3-Pin TO-252(Top View)Figure 4-2 KVU Package,3-Pin TO-252
(Top View)
Table 4-1 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
ADJUST 1 I Output feedback voltage
OUTPUT 2 O Regulated output voltage. Use the recommended capacitor value as listed in the Recommended Operating Conditions table. Place the output capacitor as close to the OUTPUT and COMMON pins of the device as possible.
INPUT 3 – Input supply voltage, 2.5V to 37V relative to OUTPUT pin. Use the recommended capacitor value as listed in the Recommended Operating Conditions table. Place the input capacitor as close to the INPUT and COMMON pins of the device as possible.