ONSEMI LM317MTG Adjustable Linear Voltage Regulator, 500mA, TO-220-3

The ONSEMI LM317MTG is an adjustable three-terminal positive voltage regulator designed for reliable, easy-to-implement power management solutions. This versatile integrated circuit can supply over 500mA of output current across a wide voltage range from 1.2V to 37V, making it suitable for a broad spectrum of electronic designs. Its primary input voltage can be as high as 40V, providing ample headroom for various input sources.

One of its key advantages is exceptional ease of use. The output voltage is set simply by selecting two external resistors, eliminating complex circuitry. This simplicity, combined with robust internal protection features—including internal current limiting, thermal shutdown, and safe-area compensation—makes the regulator inherently resilient and essentially blow-out proof under fault conditions.

The device supports floating operation, enabling its use in high-voltage applications. It offers a typical output voltage tolerance of 4%, ensuring consistent performance. Its flexibility extends beyond standard voltage regulation; by connecting a fixed resistor between the adjustment and output pins, it can be configured as a precision current regulator. It also serves as an excellent basis for creating simple adjustable switching regulators or programmable output regulators.

A significant benefit is the reduction in component inventory, as this single adjustable device can replace the need to stock numerous fixed-voltage regulators. Housed in a robust TO-220-3 through-hole package, it is designed for straightforward PCB mounting and efficient heat dissipation when used with a suitable heatsink, with an operating temperature range of 0°C to 125°C.

Key Features & Specifications

• Output Current: Maximum 500mA
• Adjustable Output Voltage: 1.2V to 37V
• Input Voltage Range: Up to 40V
• Output Type: Adjustable, Single Output