The MC79L12CP is a 3-Terminal Negative Voltage Regulator manufactured by Freescale Semiconductor (NXP). It provides a fixed -12V output voltage with a current capability typically up to 100mA. It is a low-current version of the MC79xx series regulators and is designed for applications requiring a stable -12V source with lower power requirements.

Applications

• Negative Voltage Power Supplies: Providing a stable -12V supply for various electronic circuits.
• Operational Amplifier Power Supplies: Supplying the negative voltage rail for operational amplifiers in low-power applications.
• Logic Circuits: Powering logic circuits requiring a negative voltage, especially where low current is needed.
• Instrumentation: Providing a stable negative voltage reference in low-power test and measurement equipment.
• Small Electronic Devices: Powering components in portable or battery-powered devices.

Features

• Fixed -12V Output: Provides a precise and stable -12V output voltage.
• Up to 100mA Output Current: Can deliver up to 100mA of current.
• Internal Short-Circuit Current Limiting: Protects the regulator from damage in case of a short circuit.
• Thermal Overload Protection: Shuts down the regulator if the junction temperature exceeds a safe limit.
• No External Components Required: Operates with minimal external components, simplifying design.

Benefits

• Stable Negative Voltage: Provides a reliable -12V voltage source for sensitive electronic circuits.
• Overload Protection: Prevents damage to the regulator and the connected circuitry in case of overload conditions.
• Simplified Power Supply Design: Reduces the complexity of power supply design by providing a fixed output voltage.
• Cost-Effective Solution: Offers a cost-effective solution for generating a stable negative voltage.
• Easy to Use: Requires minimal external components, making it easy to integrate into circuits.

The 'CP' suffix typically indicates a TO-92 package, which is a small plastic package suitable for low-power applications. The MC79L12CP is commonly used in applications where a stable -12V voltage is needed and the current requirements are relatively low. It's a good choice for powering op-amps, analog circuits, and other components in low-power electronic devices. Because of the lower power dissipation, it generally does not require a heat sink.