Texas Instruments Voltage Regulator Negative Adjustable Linear 0.63 W, -4.2V SOIC 8-Pin LM337LM/NOPB

Texas Instruments LM337LM/NOPB is a precision negative adjustable linear voltage regulator with a power rating of 0.63 W in a compact SOIC 8-pin surface mount package. Designed for use in power management applications, it provides stable voltage regulation with output currents up to 1.5 A on the LM317 variant and 100 mA on the LM317L. Its wide input voltage range from -1.2 V to -37 V and a maximum operating temperature of 125°C make it suitable for industrial, laboratory, and electronic equipment requiring reliable negative voltage sources.

This device maintains high ripple rejection of 77 to 80 dB, ensuring minimal output voltage noise. It requires only two external resistors to set the output voltage and one capacitor for frequency compensation, streamlining circuit design and reducing component count. Its negative polarity makes it ideal for applications that demand negative voltage regulation in power supplies, amplifiers, and control circuits.

The SOIC 8-pin surface mount package with dimensions of 4.9 mm length, 3.9 mm width, and 1.45 mm height allows for compact PCB layouts and automated soldering processes. The regulator meets typical semiconductor standards without specific automotive approvals and is designed to operate reliably in temperatures up to 125°C.

Typical uses include voltage regulation in industrial automation, signal conditioning, laboratory instruments, and consumer electronics requiring stable negative voltage rails. The LM337 series from Texas Instruments offers a dependable and easy-to-implement voltage regulator solution for varied electronic power management needs.

The device delivers reliable output current up to 1.5 A for LM317 variant and 100 mA for LM317L variant. Operates efficiently within an input voltage range from -1.2 V to -37 V. Features low ripple rejection between 77 dB and 80 dB, ensuring stable voltage output.

Compact dimensions measuring 4.9 mm length, 3.9 mm width, and 1.45 mm height facilitate integration into space-critical designs. Rated for a maximum operating temperature of 125°C suitable for demanding industrial environments.

Requires only two external resistors and one capacitor for frequency compensation, enabling simplified circuit design. Negative polarity structure suited for applications requiring negative voltage regulation. Standard SOIC package allows easy surface mounting and integration on PCBs.

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