LM317BT Adjustable Linear Voltage Regulator, 1.2-37V, 1.5A, TO-220

The LM317BT from STMicroelectronics is a high-performance, adjustable positive voltage regulator. Designed to supply over 1.5A of load current, it offers an output voltage that is easily adjustable from 1.2V to 37V, providing exceptional flexibility for a wide range of electronic projects and power supply designs. The nominal output voltage is set using a simple external resistive divider, making the device exceptionally easy to implement and eliminating the need to stock numerous fixed-voltage regulators.

This regulator features floating operation for high-voltage applications and delivers outstanding performance with a typical line and load regulation of 0.1%. It incorporates a complete series of internal protections, including current limiting, thermal shutdown, and safe operating area (SOA) control, ensuring robust and reliable operation under demanding conditions. Key technical specifications include a typical line regulation of 0.01%/V, a reference voltage of 1.25V, and excellent output voltage temperature stability of 1%.

Housed in a robust TO-220 package, the LM317BT is suitable for through-hole mounting and operates over a wide junction temperature range from -40°C to 125°C. Its combination of adjustability, high current output, and comprehensive protection makes it an ideal, versatile choice for bench power supplies, battery chargers, and as a variable voltage source in industrial and hobbyist electronics.

Key Features:

• Adjustable output from 1.2V to 37V.
• Can supply more than 1.5A of load current.
• Excellent line (0.01%/V) and load (0.1%) regulation.
• Complete internal protection: current limit, thermal shutdown, SOA control.
• Easy to use with just two external resistors.
• Floating operation for high voltage applications.
• Stable 1.25V reference voltage.
• Operates from -40°C to 125°C junction temperature.