onsemi

LM317LDG

LM317LDG Description

The LM317LDG is a linear voltage regulator designed and manufactured by onsemi. This device is part of the Linear & Switching Voltage Regulators category and is known for its adjustable output voltage capabilities. With a maximum input voltage of 40V and an output voltage range from 1.2V to 37V, the LM317LDG is well-suited for a variety of applications requiring precise voltage regulation. It offers a fixed output current of 100mA and features a single regulator in a positive output configuration. Despite being classified as obsolete, the LM317LDG remains REACH unaffected, indicating it continues to meet environmental standards.

LM317LDG Features

• Adjustable Output Voltage: The LM317LDG can be configured to provide a precise output voltage within the range of 1.2V to 37V, making it highly versatile for various electronic systems.
• Robust Protection Features: This regulator includes over current, over temperature, and short circuit protection to safeguard the system from potential damage.
• Low Quiescent Current: With a quiescent current of 10mA, the LM317LDG contributes minimally to power consumption, which is beneficial in low-power applications.
• High PSRR: The 80dB power supply rejection ratio at 120Hz ensures stable operation even in the presence of noise on the power supply lines.
• Wide Operating Temperature: Capable of operating in temperatures ranging from 0°C to 125°C, the LM317LDG is suitable for both commercial and industrial environments.
• Surface Mount Technology: The device is designed for surface mount applications, which allows for compact and efficient circuit board layouts.

LM317LDG Applications

The LM317LDG is ideal for applications where adjustable voltage regulation is required. Some specific use cases include:

• Battery Powered Devices: Due to its low quiescent current, the LM317LDG is suitable for battery-powered devices where power efficiency is critical.
• Industrial Controls: The wide operating temperature range makes it a good choice for industrial control systems that may experience temperature fluctuations.
• Audio Equipment: The LM317LDG can be used in audio equipment to provide stable voltage regulation, which is essential for maintaining audio quality.
• Telecommunications: In telecommunications equipment, stable and adjustable voltage regulation is crucial for signal integrity, making the LM317LDG a suitable choice.

Conclusion of LM317LDG

While the LM317LDG has been classified as obsolete, it remains a robust and versatile linear voltage regulator. Its adjustable output, protection features, and low quiescent current make it a reliable choice for a variety of applications. Despite being an older model, its performance benefits and compliance with environmental standards ensure that it continues to be a viable option for designers looking for a dependable voltage regulator.