onsemi

MC79L15ACD

MC79L15ACD Description

The MC79L15ACD from onsemi is a fixed-output, negative-voltage linear regulator designed to deliver a stable -15V output with a maximum current capability of 100mA. Housed in an 8-pin SOIC package, this surface-mount IC is optimized for compact and efficient power management in low-current applications. With a dropout voltage of 1.7V (typical at 40mA) and an operating temperature range of 0°C to 125°C, it ensures reliable performance in demanding environments. The device features over-temperature and short-circuit protection, enhancing system durability. Although marked as obsolete, it remains a viable choice for legacy designs due to its robust specifications and REACH compliance.

MC79L15ACD Features

• Fixed Negative Output: Delivers a precise -15V with tight regulation.
• Low Dropout Voltage: 1.7V (typical) at 40mA, minimizing power dissipation.
• High PSRR: 39dB at 120Hz, ensuring noise suppression for sensitive circuits.
• Protection Mechanisms: Built-in over-temperature and short-circuit protection for enhanced reliability.
• Wide Operating Range: Functions reliably from 0°C to 125°C, suitable for industrial applications.
• Surface-Mount Design: 8-SOIC package enables space-efficient PCB integration.

MC79L15ACD Applications

The MC79L15ACD is ideal for systems requiring stable negative voltage rails, including:

• Analog Signal Processing: Powering op-amps, sensors, and data acquisition systems.
• Industrial Control Systems: Providing regulated voltage for PLCs and instrumentation.
• Legacy Electronics: Supporting older designs where -15V rails are critical.
• Test & Measurement Equipment: Ensuring low-noise power for precision circuits.
• Audio Amplifiers: Delivering clean power to analog audio stages.

Conclusion of MC79L15ACD

The MC79L15ACD is a dependable negative-voltage regulator offering low dropout, high PSRR, and robust protection features. While obsolete, its performance makes it suitable for legacy and niche applications requiring -15V regulation with moderate current demands. Engineers working on industrial, audio, or precision analog systems may find this regulator a practical solution despite its discontinued status. For new designs, alternative modern regulators should be evaluated, but the MC79L15ACD remains a proven choice for specific use cases.