STMICROELECTRONICS L78L05ACD 5V 100mA Linear Voltage Regulator SOIC-8

The STMICROELECTRONICS L78L05ACD13TR is a high-performance, 3-terminal positive linear voltage regulator providing a fixed 5V output. Engineered for robust operation, it features internal current limiting and thermal shutdown protection, making it exceptionally reliable and resistant to damage. When paired with an adequate heat-sink, this regulator can deliver a consistent output current of up to 100mA, making it suitable for a wide range of low-power electronic circuits.

This component is designed as a fixed voltage regulator for applications requiring clean, stable power. It is ideal for local or on-card regulation, effectively eliminating noise and resolving power distribution issues commonly associated with single-point regulation systems. By providing regulation close to the load, it enhances overall circuit stability and performance.

Beyond basic regulation, the L78L05 can be paired with external power pass elements to construct high-current voltage regulator circuits, offering design flexibility. It also serves as an excellent replacement for traditional zener diode and resistor combinations, delivering superior performance with the added benefits of significantly lower quiescent current and reduced electrical noise.

Key protective features include built-in short-circuit protection and thermal overload protection, safeguarding both the regulator and your circuit. A major advantage is that it requires no external components to function, simplifying board design and reducing the bill of materials.

With an operating temperature range of 0°C to 125°C and a compact SOIC-8 surface-mount package, it is well-suited for modern, space-constrained PCB designs. Its reliable performance makes it a cornerstone component for power management in consumer electronics, industrial controls, and embedded systems.