LM317 Adjustable Voltage Regulator TO-220

LM317 Adjustable Voltage Regulator TO-220 is a versatile and widely used linear voltage regulator capable of providing an adjustable output voltage from 1.25V to 37V. With a maximum output current of 1.5A, it is ideal for power supply designs, battery chargers, and voltage regulation in electronic circuits. Its TO-220 package ensures efficient heat dissipation and ease of use.

Key Features of LM317 Adjustable Voltage Regulator:

• • Adjustable Output: Provides an output voltage range of 1.25V to 37V.
  • High Current Capacity: Supports up to 1.5A of continuous output current.
  • Low Dropout Voltage: Operates with a dropout voltage as low as 1.5V.
  • Built-in Protection: Includes thermal overload, current limiting, and safe operating area (SOA) protection.
  • Compact Package: TO-220 package for efficient heat dissipation.

Technical Specifications of LM317 Adjustable Voltage Regulator:

• • Output Voltage Range: 1.25V to 37V
  • Output Current: Up to 1.5A
  • Input Voltage Range: 3V to 40V
  • Dropout Voltage: 1.5V at 1.5A
  • Line Regulation: 0.01% (typical)
  • Load Regulation: 0.1% (typical)
  • Package Type: TO-220
  • Operating Temperature: 0°C to +125°C

Mechanical Characteristics of LM317 Adjustable Voltage Regulator:

• • Dimensions: 10.4mm x 4.6mm x 9.15mm (TO-220 package)
  • Weight: Approximately 2 grams
  • Material: Epoxy mold compound
  • Mounting: Through-hole
  • Color: Black with white markings

Schematic Diagram and Pinout of LM317 Adjustable Voltage Regulator:

• • Pinout:
    • Pin 1: Adjust (ADJ) – Connects to the voltage divider for output adjustment.
    • Pin 2: Output (OUT) – Provides the regulated output voltage.
    • Pin 3: Input (IN) – Connects to the input voltage source.
  • Schematic Diagram: The LM317 connects to an input voltage source (Pin 3), with the output (Pin 2) providing the regulated voltage. The ADJ pin (Pin 1) is connected to a voltage divider to set the desired output voltage.

Applications of LM317 Adjustable Voltage Regulator:

• • Power Supplies: Provides stable voltage for electronic circuits.
  • Battery Chargers: Regulates charging voltage for batteries.
  • Voltage Regulation: Adjusts voltage levels in DIY projects and prototypes.
  • Industrial Equipment: Used in machinery requiring precise voltage control.
  • DIY Electronics: Perfect for hobbyists building adjustable power supplies.

Equivalent Models of LM317 Adjustable Voltage Regulator:

• • LM338 Voltage Regulator: A similar adjustable voltage regulator with a higher current capacity.
  • LM350 Voltage Regulator: Alternative adjustable regulator with a 3A current capacity.

Datasheet:

• • Download LM317 Adjustable Voltage Regulator Datasheet

Keywords for LM317 Adjustable Voltage Regulator:

• • Adjustable Voltage Regulator
  • 1.5A Voltage Regulator

Package Includes:

• • 1 x LM317 Adjustable Voltage Regulator TO-220