STMICROELECTRONICS 7905 Linear Voltage Regulator, -5V, 100mA, SOT-89-3

The STMICROELECTRONICS L79L05ACUTR is a robust 3-terminal negative voltage regulator providing a fixed -5V output. Engineered for reliability, it features internal current limiting and thermal shutdown protection, making it exceptionally durable for demanding applications. With an adequate heat sink, this regulator can deliver up to 100mA of output current, ensuring stable performance.

This component is designed as a fixed voltage regulator, ideal for local or on-card regulation to eliminate noise and address distribution issues commonly associated with single-point regulation systems. It serves as a superior replacement for Zener diode and resistor combinations, offering a significant improvement in output impedance—typically by two orders of magnitude—along with the benefits of lower quiescent current and reduced electrical noise. A key advantage is that no external components are required for basic operation, simplifying circuit design and reducing component count.

Key Features & Applications

• Robust Protection: Integrated current limiting and thermal shutdown safeguard the device against overload and overheating.
• High Performance: Delivers a stable -5V output with low noise and improved output impedance compared to traditional solutions.
• Design Flexibility: Can be used with power pass elements to construct high-current voltage regulator circuits, extending its utility beyond simple regulation tasks.
• Surface Mount Design: The SOT-89-3 package is suited for modern, space-constrained PCB layouts.

Ideal for power management in industrial environments and a wide array of electronic systems, this linear voltage regulator provides a dependable and efficient solution for achieving clean, regulated negative voltage rails.