Texas Instruments

LM317H

LM317H Description

The LM317H from Texas Instruments is a robust, adjustable positive linear voltage regulator designed for high-performance power management applications. With an input voltage range up to 40V and an adjustable output voltage from 1.25V to 37V, it delivers a stable 1.5A output current, making it ideal for demanding circuits. Packaged in a TO-3 metal can for superior thermal dissipation, this regulator ensures reliable operation across a wide temperature range (0°C to 125°C). Its low quiescent current (10 mA) and high PSRR (80dB to 65dB at 120Hz) minimize power loss and noise, enhancing efficiency in sensitive systems.

LM317H Features

• Adjustable Output: Precision voltage adjustment via external resistors for flexible design.
• High Current Capacity: Supports 1.5A continuous output with over-current, over-temperature, and short-circuit protection.
• Wide Input Range: Accepts up to 40V input, accommodating diverse power sources.
• Excellent Regulation: Low dropout voltage and high PSRR ensure stable performance under load variations.
• Durable Packaging: TO-3 metal case provides superior heat dissipation and mechanical robustness.
• Compliance: ROHS3 and REACH compliant, with MSL 1 (Unlimited) moisture sensitivity for extended shelf life.

LM317H Applications

The LM317H excels in applications requiring precise voltage regulation and high reliability, such as:

• Industrial Power Supplies: Stable voltage for control systems, PLCs, and motor drives.
• Test & Measurement Equipment: Low-noise power for sensitive instrumentation.
• Automotive Electronics: Robust performance in harsh environments.
• DIY Projects & Prototyping: Easy-to-use adjustable regulator for hobbyists and engineers.
• Renewable Energy Systems: Voltage regulation in solar/wind power converters.

Conclusion of LM317H

The LM317H stands out as a versatile, high-performance linear regulator, combining adjustability, durability, and protection features in a single package. Its TO-3 metal casing and wide operating range make it a preferred choice for industrial, automotive, and precision electronics. Whether for prototyping or mass production, the LM317H delivers reliable, efficient power management with minimal external components, solidifying its position as a cornerstone in voltage regulation solutions.