onsemi

LM78L05ACZX

LM78L05ACZX Description

The LM78L05ACZX from onsemi is a fixed 5V linear voltage regulator designed for low-power applications. With an input voltage range up to 30V and a 100mA output current, it provides stable voltage regulation for a variety of electronic circuits. This positive-output regulator is housed in a TO-92-3 package, making it suitable for through-hole mounting. Although marked as obsolete, it remains a reliable choice for legacy designs due to its robust protection features, including over-temperature and short-circuit protection. The device exhibits a quiescent current of 5.5mA and delivers 80dB PSRR (120Hz), ensuring minimal noise interference in sensitive applications.

LM78L05ACZX Features

• Fixed 5V Output: Ensures consistent voltage regulation without external adjustments.
• High Input Voltage Tolerance (30V): Supports a wide range of input sources.
• Low Quiescent Current (5.5mA): Optimizes power efficiency in battery-operated systems.
• Robust Protection: Built-in thermal shutdown and short-circuit protection enhance reliability.
• High PSRR (80dB at 120Hz): Reduces ripple and noise for cleaner power delivery.
• TO-92-3 Package: Compact and easy to integrate into through-hole PCB designs.
• REACH Unaffected: Compliant with environmental regulations.

LM78L05ACZX Applications

The LM78L05ACZX is ideal for low-power, precision voltage regulation in:

• Consumer Electronics: Powering microcontrollers, sensors, and small logic circuits.
• Industrial Control Systems: Providing stable voltage for PLCs and instrumentation.
• Automotive Electronics: Auxiliary power supply for infotainment or dashboard modules.
• Embedded Systems: Reliable voltage regulation in IoT devices and wearables.
• Legacy Designs: Suitable for maintaining or repairing older electronic equipment.

Conclusion of LM78L05ACZX

The LM78L05ACZX is a dependable 5V linear regulator with a balance of performance and simplicity. Its high input tolerance, low quiescent current, and robust protection make it a practical choice for low-power applications requiring stable voltage. While newer alternatives exist, its ease of use and proven reliability ensure continued relevance in legacy and cost-sensitive designs. Engineers seeking a straightforward, through-hole regulator for consumer, industrial, or automotive systems will find this component a viable solution.