LM79L05ACM/NOPB

Product Overview

LM79L05ACM/NOPB from Texas Instruments is a negative fixed linear voltage regulator intended to provide a regulated -5 V output from a negative input supply. The device is packaged in an 8-SOIC surface-mount case and is specified for a maximum output current of 100 mA. It includes over-temperature and short-circuit protection, operates from 0°C to 70°C, and has a quiescent current of 6 mA. With a single regulator output and a PSRR of 50 dB at 120 Hz, it is suitable for generating a negative auxiliary rail in compact power-management designs.

Key Features

• Provides a fixed negative output voltage of -5 V from a negative input rail with a maximum input voltage of -35 V.
• Delivers up to 100 mA output current from a single regulator channel.
• Includes over-temperature and short-circuit protection features.
• Uses a surface-mount 8-SOIC package with 0.154 in / 3.90 mm width.
• Quiescent current is 6 mA, and PSRR is 50 dB at 120 Hz.
• Operating temperature range is 0°C to 70°C.

Applications

• Generating a regulated -5 V auxiliary rail for low-current analog circuitry on mixed-signal printed circuit boards.
• Supplying a fixed negative bias voltage to signal-processing circuit blocks that require a -5 V rail.
• Providing a compact surface-mount negative rail in power subsystems where a single 100 mA output is sufficient.

Design & Procurement Notes

Designers should confirm that the available input rail is negative and remains within the specified maximum of -35 V, while the load current stays below the 100 mA output limit. Because the output is fixed at -5 V, the input-to-output differential determines power dissipation; board layout and thermal relief should account for the 8-SOIC surface-mount package. The 0°C to 70°C operating range and over-temperature and short-circuit protection features apply only within the specified conditions, but input filtering, return-path layout, and load transient behavior should still be evaluated because PSRR is specified only at 120 Hz.