onsemi

LM337PWD

LM337PWD Description

The LM337PWD is a high-performance, adjustable negative linear voltage regulator designed for a wide range of power management applications. Manufactured by onsemi, this regulator offers a robust and reliable solution for generating stable negative output voltages. Despite being marked as obsolete, the LM337PWD remains a viable option for many legacy systems and specific applications where its unique features are advantageous.

LM337PWD Features

• Adjustable Output Voltage: The LM337PWD provides an adjustable output voltage, making it highly versatile for various power supply requirements. This flexibility allows engineers to tailor the regulator to meet specific voltage needs within their designs.
• High Output Current: With a maximum output current of 1.5A, the LM337PWD can support demanding applications that require significant power delivery. This capability ensures that the regulator can handle high-current loads efficiently.
• Negative Output Configuration: The regulator is specifically designed for negative output voltage applications, making it ideal for systems that require a negative power supply rail.
• Low Quiescent Current: The LM337PWD operates with a quiescent current of just 6 mA, which is crucial for applications where power efficiency is paramount. This low quiescent current minimizes power loss and enhances overall system efficiency.
• Over Current and Over Temperature Protection: The regulator incorporates built-in protection features to safeguard against over current and over temperature conditions. These safety mechanisms ensure reliable operation and protect the regulator from potential damage, thereby enhancing system reliability.
• High Power Supply Rejection Ratio (PSRR): With a PSRR of 77dB at 120Hz, the LM337PWD effectively filters out noise and ripple from the input power supply. This high PSRR ensures a clean and stable output voltage, which is essential for sensitive electronic circuits.
• Compliance and Packaging: The LM337PWD is REACH unaffected and ROHS3 compliant, ensuring it meets stringent environmental and regulatory standards. It is available in bulk packaging, which is suitable for industrial and commercial applications.

LM337PWD Applications

The LM337PWD is well-suited for a variety of applications where a stable and adjustable negative voltage supply is required. Some specific use cases include:

• Power Supplies: Ideal for laboratory and industrial power supplies that need a precise and stable negative voltage output.
• Audio Equipment: Used in audio amplifiers and other audio-related devices where a negative power supply rail is necessary to achieve high-fidelity performance.
• Telecommunications: Suitable for telecommunication equipment that requires a negative voltage supply for specific components and circuits.
• Medical Devices: Applicable in medical devices where a stable power supply is crucial for accurate and reliable operation.
• Industrial Control Systems: Used in various industrial control systems where a negative voltage supply is required for specific control and monitoring functions.

Conclusion of LM337PWD

The LM337PWD, despite being marked as obsolete, remains a valuable component in the power management landscape. Its adjustable output voltage, high output current, and negative output configuration make it a versatile and reliable solution for a wide range of applications. The regulator's low quiescent current, high PSRR, and built-in protection features further enhance its performance and reliability. While newer alternatives may exist, the LM337PWD continues to serve as an excellent choice for legacy systems and specific applications where its unique features are essential.