Datasheet LM317 (Texas Instruments) - 5
| Manufacturer | Texas Instruments |
| Description | 3-Terminal Adjustable Regulator datasheet |
| Pages / Page | 44 / 5 — LM317. www.ti.com. 5 Pin Configuration and Functions. Figure 5-2. KCS or … |
| File Format / Size | PDF / 2.4 Mb |
| Document Language | English |
LM317. www.ti.com. 5 Pin Configuration and Functions. Figure 5-2. KCS or KCT Package, 3-Pin TO-220. (Top View), Legacy Chip
Model Line for this Datasheet
LM317
Text Version of Document
LM317 www.ti.com
SLVS044Z – SEPTEMBER 1997 – REVISED APRIL 2025
5 Pin Configuration and Functions
3 INPUT 1 ADJUST 2 OUTPUT OUTPUT 4 2 OUTPUT 1 ADJUST OUTPUT
Figure 5-2. KCS or KCT Package, 3-Pin TO-220
3 INPUT
(Top View), Legacy Chip Figure 5-1. DCY Package, 4-Pin SOT-223 (Top View)
3 INPUT 2 OUTPUT OUTPUT 1 ADJUST
Figure 5-3. KTT Package, 3-Pin TO-263 (Top View) Pin Functions, Metal Can Packages PIN I/O DESCRIPTION TO-220 NAME TO-263 SOT-223 (Legacy Chip)
Output voltage adjustment pin. Connect to a ADJUST 1 1 1 — resistor divider to set VOUT. INPUT 3 3 3 I Input voltage pin for the regulator. OUTPUT 2, TAB 2, TAB 2, TAB O Output voltage pin for the regulator. Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 5 Product Folder Links: LM317 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information (Legacy Chip) 6.5 Thermal Information (New Chip) 6.6 Electrical Characteristics 6.7 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 NPN Darlington Output Drive 7.3.2 Overload Block 7.3.3 Programmable Feedback 7.4 Device Functional Modes 7.4.1 Normal Operation 7.4.2 Operation With Low Input Voltage 7.4.3 Operation at Light Loads 7.4.4 Operation In Self Protection 8 Application and Implementation 8.1 Application Information 8.2 Typical Application 8.2.1 Design Requirements 8.2.2 Detailed Design Procedure 8.2.3 Application Curves 8.3 System Examples 8.3.1 0V to 30V Regulator Circuit 8.3.2 Adjustable Regulator Circuit With Improved Ripple Rejection 8.3.3 Precision Current-Limiter Circuit 8.3.4 Tracking Preregulator Circuit 8.3.5 1.25V to 20V Regulator Circuit With Minimum Program Current 8.3.6 Battery-Charger Circuit 8.3.7 50mA, Constant-Current, Battery-Charger Circuit 8.3.8 Slow Turn-On 15V Regulator Circuit 8.3.9 AC Voltage-Regulator Circuit 8.3.10 Current-Limited 6V Charger Circuit 8.3.11 Adjustable 4A Regulator Circuit 8.3.12 High-Current Adjustable Regulator Circuit 8.4 Power Supply Recommendations 8.5 Layout 8.5.1 Layout Guidelines 8.5.1.1 Thermal Considerations 8.5.1.1.1 Heat Sink Requirements 8.5.1.1.2 Heat Sinking Surface-Mount Packages 8.5.1.1.2.1 Heatsinking the SOT-223 (DCY) Package 8.5.1.1.2.2 Heat Sinking the TO-263 (KTT) Package 8.5.2 Layout Examples 9 Device and Documentation Support 9.1 Device Support 9.1.1 Device Nomenclature 9.2 Receiving Notification of Documentation Updates 9.3 Support Resources 9.4 Trademarks 9.5 Electrostatic Discharge Caution 9.6 Glossary 10 Revision History 11 Mechanical, Packaging, and Orderable Information
SLVS044Z – SEPTEMBER 1997 – REVISED APRIL 2025
5 Pin Configuration and Functions
3 INPUT 1 ADJUST 2 OUTPUT OUTPUT 4 2 OUTPUT 1 ADJUST OUTPUT
Figure 5-2. KCS or KCT Package, 3-Pin TO-220
3 INPUT
(Top View), Legacy Chip Figure 5-1. DCY Package, 4-Pin SOT-223 (Top View)
3 INPUT 2 OUTPUT OUTPUT 1 ADJUST
Figure 5-3. KTT Package, 3-Pin TO-263 (Top View) Pin Functions, Metal Can Packages PIN I/O DESCRIPTION TO-220 NAME TO-263 SOT-223 (Legacy Chip)
Output voltage adjustment pin. Connect to a ADJUST 1 1 1 — resistor divider to set VOUT. INPUT 3 3 3 I Input voltage pin for the regulator. OUTPUT 2, TAB 2, TAB 2, TAB O Output voltage pin for the regulator. Copyright © 2025 Texas Instruments Incorporated Submit Document Feedback 5 Product Folder Links: LM317 Document Outline 1 Features 2 Applications 3 Description Table of Contents 4 Device Comparison Table 5 Pin Configuration and Functions 6 Specifications 6.1 Absolute Maximum Ratings 6.2 ESD Ratings 6.3 Recommended Operating Conditions 6.4 Thermal Information (Legacy Chip) 6.5 Thermal Information (New Chip) 6.6 Electrical Characteristics 6.7 Typical Characteristics 7 Detailed Description 7.1 Overview 7.2 Functional Block Diagram 7.3 Feature Description 7.3.1 NPN Darlington Output Drive 7.3.2 Overload Block 7.3.3 Programmable Feedback 7.4 Device Functional Modes 7.4.1 Normal Operation 7.4.2 Operation With Low Input Voltage 7.4.3 Operation at Light Loads 7.4.4 Operation In Self Protection 8 Application and Implementation 8.1 Application Information 8.2 Typical Application 8.2.1 Design Requirements 8.2.2 Detailed Design Procedure 8.2.3 Application Curves 8.3 System Examples 8.3.1 0V to 30V Regulator Circuit 8.3.2 Adjustable Regulator Circuit With Improved Ripple Rejection 8.3.3 Precision Current-Limiter Circuit 8.3.4 Tracking Preregulator Circuit 8.3.5 1.25V to 20V Regulator Circuit With Minimum Program Current 8.3.6 Battery-Charger Circuit 8.3.7 50mA, Constant-Current, Battery-Charger Circuit 8.3.8 Slow Turn-On 15V Regulator Circuit 8.3.9 AC Voltage-Regulator Circuit 8.3.10 Current-Limited 6V Charger Circuit 8.3.11 Adjustable 4A Regulator Circuit 8.3.12 High-Current Adjustable Regulator Circuit 8.4 Power Supply Recommendations 8.5 Layout 8.5.1 Layout Guidelines 8.5.1.1 Thermal Considerations 8.5.1.1.1 Heat Sink Requirements 8.5.1.1.2 Heat Sinking Surface-Mount Packages 8.5.1.1.2.1 Heatsinking the SOT-223 (DCY) Package 8.5.1.1.2.2 Heat Sinking the TO-263 (KTT) Package 8.5.2 Layout Examples 9 Device and Documentation Support 9.1 Device Support 9.1.1 Device Nomenclature 9.2 Receiving Notification of Documentation Updates 9.3 Support Resources 9.4 Trademarks 9.5 Electrostatic Discharge Caution 9.6 Glossary 10 Revision History 11 Mechanical, Packaging, and Orderable Information