onsemi

MC78L05ABDG

MC78L05ABDG Description

The MC78L05ABDG from onsemi is a fixed-output linear voltage regulator designed to deliver a stable 5V output with a maximum input voltage of 30V and an output current capability of 100mA. Housed in an 8-SOIC package, this surface-mount device is ideal for space-constrained applications requiring reliable voltage regulation. Although marked as obsolete, it remains a robust choice for legacy designs due to its proven performance and REACH compliance. The regulator features low quiescent current (6mA) and 49dB PSRR (120Hz), ensuring efficient noise suppression and stable operation in noisy environments.

MC78L05ABDG Features

• Fixed 5V Output: Ensures consistent voltage regulation for low-power circuits.
• Wide Input Range (Up to 30V): Accommodates varying input sources.
• Over-Temperature & Short-Circuit Protection: Enhances reliability under fault conditions.
• Low Quiescent Current (6mA): Optimizes power efficiency in battery-operated systems.
• High PSRR (49dB at 120Hz): Minimizes output ripple in sensitive analog/digital applications.
• Surface-Mount 8-SOIC Package: Suitable for compact PCB designs.

MC78L05ABDG Applications

The MC78L05ABDG is well-suited for:

• Embedded Systems: Powering microcontrollers, sensors, and low-power logic circuits.
• Consumer Electronics: Voltage regulation in portable devices, audio equipment, and peripherals.
• Industrial Controls: Stabilizing supply voltages in PLCs, instrumentation, and automation systems.
• Legacy Designs: Maintaining continuity in systems where newer alternatives are incompatible.

Conclusion of MC78L05ABDG

While the MC78L05ABDG is classified as obsolete, its high PSRR, robust protection features, and compact form factor make it a viable solution for low-power, noise-sensitive applications. Engineers working on legacy or cost-sensitive projects may find it advantageous due to its reliability and ease of integration. For new designs, alternative modern regulators with lower Iq or higher efficiency may be preferred, but the MC78L05ABDG remains a dependable choice where its specifications align with system requirements.