LM337 high performance linear regulator

The LM337 is a versatile and high-performance three-terminal adjustable negative voltage regulator IC. It is part of the LM337/LM337HV series and provides a regulated output voltage that can be adjusted between -1.25V and -37V, depending on the input voltage and external components. The LM337 is widely used in applications where precise and stable negative voltage regulation is required, such as in power supplies, test equipment, instrumentation, and analog circuitry.

Key Features:

• Output Voltage Range: Adjustable from -1.25V to -37V
• Output Current: Up to 1.5A (with adequate heatsinking)
• Input Voltage Range: Up to -40V (for the LM337)
• Line Regulation: Typically 0.01%/V
• Load Regulation: Typically 0.1%
• Internal Thermal Shutdown: Protects against overheating
• Short Circuit Protection: Limits current during short circuit conditions
• Adjustable Output Voltage: Set using external resistors
• Low Dropout Voltage: Typically 1.5V at 1A load current

Technical Specifications:

• Adjustment Pin Current: Typically 50µA
• Temperature Range: 0°C to +125°C
• Package: TO-220 (Standard), TO-220FP (Isolated), SO-8 (Surface-Mount), and other variants
• Reference Voltage: -1.25V (typical)
• Quiescent Current: Typically 10mA
• Ripple Rejection: Typically 77dB at 120Hz

Applications:

• Power Supplies: Ideal for generating negative voltage rails in dual polarity power supplies.
• Analog Circuits: Used in analog signal conditioning circuits requiring precise negative voltage regulation.
• Test and Measurement Instruments: Provides stable negative voltage references in test equipment and measurement instruments.
• Audio Amplifiers: Suitable for biasing negative voltage rails in audio amplifier circuits.
• Battery Chargers: Used in battery charging circuits requiring negative voltage regulation.
• Industrial Control Systems: Applied in industrial automation and control systems.

Datasheet:
For detailed technical information, refer to the LM337 high-performance linear regulator datasheet.