The MC79L24CP is a three-terminal negative voltage regulator from Freescale Semiconductor (now NXP). This device is part of the MC79L series, designed to provide a fixed negative output voltage of -24V with a low dropout voltage and a current rating of up to 100mA. It is commonly used in various electronic circuits to provide a stable negative voltage source for sensitive components. This regulator's small size and simplicity make it ideal for applications where board space is limited.

Applications

• Negative voltage regulation in small electronic devices
• Power supplies for operational amplifiers requiring negative rails
• Battery-powered equipment
• Linear regulators for low-current applications
• Simple on-card regulation

Features

• Fixed Output Voltage: Provides a stable -24V output.
• Low Dropout Voltage: Operates with a minimal difference between input and output voltages.
• Output Current: Capable of supplying up to 100mA of output current.
• Internal Short-Circuit Current Limiting: Protects the regulator and connected circuitry from overcurrent conditions.
• Thermal Overload Protection: Shuts down the regulator if the junction temperature exceeds safe limits.
• Small Package: Typically comes in a small through-hole or surface-mount package, saving board space.

Benefits

• Stable Negative Voltage Source: Ensures reliable operation of components requiring a negative voltage rail.
• Easy to Use: Requires minimal external components for operation.
• Protection Features: Prevents damage from overcurrent and overheating.
• Compact Size: Suitable for applications with limited board space.
• Cost-Effective: Offers a simple and inexpensive solution for negative voltage regulation.

Additional Details

The MC79L24CP typically requires only a few external capacitors for stable operation. The input capacitor helps to filter noise on the input voltage line, while the output capacitor improves transient response and stability. This regulator is designed to be robust and provide a reliable negative voltage source in a variety of applications. It is essential to consider thermal management when using this device, especially at higher output currents. A heatsink might be required if the regulator dissipates significant power to prevent overheating.