onsemi

LM317BD2T

LM317BD2T Description

The LM317BD2T from onsemi is an adjustable positive linear voltage regulator in a D2PAK-3 surface-mount package, designed to deliver up to 1.5A of output current with an input voltage range up to 40V. This obsolete but robust regulator offers an adjustable output voltage from 1.2V to 37V, making it highly versatile for various power supply designs. With a quiescent current of 10 mA and excellent PSRR (80dB ~ 65dB at 120Hz), it ensures stable performance in noisy environments. The device includes critical protection features such as over-current, over-temperature, and short-circuit protection, enhancing reliability in demanding applications.

LM317BD2T Features

• Adjustable Output: Wide output range (1.2V–37V) for flexible design integration.
• High Current Capability: Supports up to 1.5A continuous output current.
• Robust Protection: Built-in safeguards against over-current, over-temperature, and short circuits.
• Low Dropout: Efficient operation with minimal headroom voltage.
• High PSRR: Superior noise rejection (80dB at 120Hz) for clean power delivery.
• Surface-Mount Package: D2PAK-3 (TO-263) for compact PCB layouts and thermal efficiency.
• Wide Input Range: Accepts up to 40V, suitable for industrial and automotive applications.

LM317BD2T Applications

• Industrial Power Supplies: Stable voltage regulation for control systems and sensors.
• Automotive Electronics: Reliable power management in infotainment and lighting systems.
• Consumer Electronics: Adjustable voltage rails for audio amplifiers and portable devices.
• Test & Measurement Equipment: Precision voltage references and lab power supplies.
• Embedded Systems: Low-noise power for microcontrollers and analog circuits.

Conclusion of LM317BD2T

The LM317BD2T remains a dependable choice for engineers needing a high-current, adjustable linear regulator with robust protection features. Its wide input range, high PSRR, and thermal protection make it ideal for industrial, automotive, and precision electronic applications. While marked as obsolete, its proven performance ensures continued relevance in legacy and new designs requiring stable, noise-resistant power regulation. For projects demanding durability and flexibility, the LM317BD2T offers a compelling balance of performance and reliability.