The LM79L05F is a three-terminal negative voltage regulator that provides a fixed output voltage of -5V. It is designed for a wide range of applications, including local, on-card regulation. The LM79L05 series is popular due to its ease of use and cost-effectiveness. Because it is a negative voltage regulator, it is primarily used in circuits requiring a negative voltage supply, often in conjunction with a positive voltage regulator such as the LM7805.

Applications

• Local on-card regulation
• Negative voltage power supplies
• Linear power supplies
• Microprocessor power supplies
• Instrumentation
• Industrial control systems

Features

• Fixed output voltage of -5V
• Output current up to 100mA
• Internal short-circuit current limiting
• Thermal overload protection
• No external components required for basic operation
• Available in small outline package (SO-8)

Benefits

• Simple and easy to use, requiring minimal external components.
• Provides a stable and accurate -5V output voltage.
• Protects the regulator from damage due to short circuits and over-temperature conditions.
• Cost-effective solution for negative voltage regulation.
• Small package size allows for use in space-constrained applications.

Additional Details

The LM79L05F requires only input and output capacitors for stable operation. Internal current limiting and thermal shutdown circuitry protect the device from overload conditions. This regulator is often used in conjunction with positive voltage regulators to provide both positive and negative supply rails for analog circuits, op-amps, and other electronic components. The output voltage is guaranteed to within a certain tolerance over the specified operating temperature and input voltage range. This is a linear regulator, meaning it dissipates excess power as heat, so thermal management may be necessary in higher current applications.

The LM79L05F is a reliable choice for applications needing a simple and robust -5V regulated power supply.