Texas Instruments LM337IMPX Negative Linear Voltage Regulator, Adjustable, SOT-

The Texas Instruments LM337IMPX/NOPB is a high-performance, adjustable 3-terminal negative linear voltage regulator, engineered to deliver a robust -1.5A output current across a wide output voltage range of -1.25V to -37V. This versatile device is designed for simplicity and reliability, requiring only two external resistors to set the precise output voltage and a single output capacitor for frequency compensation. Its optimised circuit design ensures excellent voltage regulation with minimal thermal transients, providing stable and consistent power for sensitive electronic circuits.

This regulator incorporates multiple layers of built-in protection to ensure operational safety and longevity. Key features include internal current limiting, thermal shutdown, and safe-area compensation, making it highly resilient against overload conditions and virtually blowout-proof. With a high ripple rejection of 77dB, it effectively filters out input noise, while its typical line regulation of 0.01%/V and load regulation of 0.3% guarantee a steady output despite fluctuations in input voltage or load demand.

As the ideal negative-voltage counterpart to the popular LM117 and LM317 positive regulators, the LM337IMPX is a cornerstone component for creating symmetrical power supplies. Its operation is based on a constant reference voltage across a programming resistor, which generates a constant current through an output-set resistor to establish the desired negative output voltage. The device is also a green product, manufactured without antimony or brominated flame retardants (no Sb/Br).

Applications

This highly reliable regulator is perfectly suited for a broad spectrum of industrial and commercial power management applications, including:

• Automation and process control systems
• Building automation and management networks
• Communications and networking equipment
• Sensing devices,