SNVSAC2A
March 2015 – June 2020
LM317A
PRODUCTION DATA.
1
Features
2
Applications
Typical Application
3
Description
Revision History
4
Device Comparison Table
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Load Regulation
7.4
Device Functional Modes
7.4.1
External Capacitors
7.4.2
Protection Diodes
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
1.25-V to 25-V Adjustable Regulator
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curve
8.2.2
5-V Logic Regulator With Electronic Shutdown
8.2.3
Slow Turnon 15-V Regulator
8.2.4
Adjustable Regulator With Improved Ripple Rejection
8.2.5
High-Stability 10-V Regulator
8.2.6
High-Current Adjustable Regulator
8.2.7
Emitter-Follower Current Amplifier
8.2.8
1-A Current Regulator
8.2.9
Common-Emitter Amplifier
8.2.10
Low-Cost 3-A Switching Regulator
8.2.11
Current-Limited Voltage Regulator
8.2.12
Adjusting Multiple On-Card Regulators With Single Control
8.2.13
AC Voltage Regulator
8.2.14
12-V Battery Charger
8.2.15
Adjustable 4-A Regulator
8.2.16
Current-Limited 6-V Charger
8.2.17
Digitally-Selected Outputs
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.1.1
Thermal Considerations
10.1.1.1
Heatsink Requirements
10.1.1.2
Heatsinking Surface Mount Packages
10.1.1.2.1
Heatsinking the SOT-223 (DCY) Package
10.1.1.2.2
Heatsinking the TO-252 (NDP) Package
10.2
Layout Examples
11
Device and Documentation Support
11.1
Documentation Support
11.1.1
Related Documentation
11.2
Receiving Notification of Documentation Updates
11.3
Support Resources
11.4
Trademarks
11.5
Electrostatic Discharge Caution
11.6
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
NDP|3
MMSF021A
DCY|4
MPDS094A
NDE|3
MMSF014
NDT|3
MMSF002
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvsac2a_oa
snvsac2a_pm
10.2
Layout Examples
Figure 44.
Layout Example (SOT-223)
Figure 45.
Layout Example (TO-220)