onsemi

LM317LDR2

LM317LDR2 Description

The LM317LDR2 is a Linear & Switching Voltage Regulator from onsemi, designed for applications requiring precise voltage regulation. With an adjustable output type, it can handle an input voltage of up to 40V and deliver an output current of 100mA. The single regulator configuration is set for positive output, making it suitable for a wide range of applications. Despite being classified as obsolete, the LM317LDR2 remains a REACH unaffected product, ensuring compliance with environmental regulations.

LM317LDR2 Features

• Adjustable Output Voltage: The LM317LDR2 offers a variable output voltage range from 1.2V to 37V, providing flexibility in design.
• Robust Protection: It includes over current, over temperature, and short circuit protection features, enhancing reliability and safety.
• Low Quiescent Current: With a quiescent current of only 10mA, it minimizes power consumption in standby modes.
• High PSRR: An 80dB power supply rejection ratio at 120Hz ensures stable operation in noisy environments.
• Moisture Sensitivity Level 1: This indicates an unlimited storage time before baking is required, simplifying handling and storage.
• Wide Operating Temperature: Capable of operating in temperatures from 0°C to 125°C, it is suitable for both commercial and industrial applications.

LM317LDR2 Applications

The LM317LDR2 is ideal for applications where precise voltage regulation is critical, such as:

• Battery Powered Devices: Due to its low quiescent current, it extends battery life in portable electronics.
• Industrial Controls: Its robust protection features make it suitable for use in harsh industrial environments.
• Test and Measurement Equipment: The adjustable output allows for precise voltage settings in testing scenarios.

Conclusion of LM317LDR2

While the LM317LDR2 is considered obsolete, its unique combination of adjustable output, robust protection, and low power consumption still makes it a viable option for certain applications. Its compliance with REACH and a wide operating temperature range further enhances its appeal for legacy systems or specific use cases where its performance characteristics are unmatched by newer models. Despite its age, the LM317LDR2 continues to offer reliable voltage regulation in a variety of electronic designs.