The LM137K/883QS is an adjustable 3-terminal negative voltage regulator manufactured by National Semiconductor, now part of Texas Instruments (TI). It is designed to provide a stable and adjustable negative voltage output, making it suitable for a variety of power supply applications.

Applications:

• Adjustable Power Supplies: Used to create power supplies with adjustable negative voltage outputs.
• Instrumentation: Employed in test and measurement equipment requiring precise negative voltage regulation.
• Linear Regulators: Used in linear regulation circuits for stable voltage outputs.
• Battery Chargers: Integrated into battery charging circuits to regulate the charging voltage.
• Industrial Control Systems: Found in industrial equipment needing stable negative voltage references.

Features:

• Adjustable Output Voltage: Allows for adjusting the output voltage to the desired level using external resistors.
• 3-Terminal Design: Simplifies circuit design and reduces the number of external components required.
• Internal Current Limiting: Provides protection against overcurrent conditions.
• Thermal Overload Protection: Prevents damage to the regulator due to excessive heat.
• Military Temperature Range: Operates reliably over a wide temperature range, suitable for military applications.

Benefits:

• Flexible Voltage Regulation: Adjustable output voltage enables use in a wide range of applications.
• Simplified Design: 3-terminal design simplifies circuit layout and reduces component count.
• Enhanced System Protection: Internal current limiting and thermal overload protection prevent damage to the regulator and the load.
• Improved System Reliability: Operates reliably over a wide temperature range, ensuring stable performance.
• Cost-Effective Solution: Provides a simple and cost-effective solution for negative voltage regulation.

The LM137K/883QS's technical specifications typically include parameters such as output voltage range, output current, input voltage range, and operating temperature range. Its adjustable output voltage feature is achieved through the use of external resistors, allowing designers to tailor the output voltage to specific application requirements. The robust design of this regulator provides reliable performance in demanding environments. The /883QS designation indicates that this part meets specific military-grade standards for performance and reliability.