The TS79L12CY is a three-terminal negative voltage regulator from Taiwan Semiconductor. This device provides a fixed output voltage of -12V and is capable of supplying up to 100mA of output current. It is designed for a wide range of applications requiring a regulated negative voltage supply.

Applications:

• Negative Voltage Regulation: Provides a stable -12V output for various electronic circuits.
• Linear Power Supplies: Used in linear power supplies to provide a regulated negative voltage output.
• Instrumentation: Employed in test and measurement equipment for providing a precise negative voltage reference.
• Operational Amplifier Power Supplies: Used to power operational amplifiers that require a negative supply voltage.
• Microcontroller Systems: Can be used in microcontroller-based systems for providing a regulated negative supply.

Features:

• Fixed Output Voltage (-12V): Provides a stable and precise negative voltage output.
• Output Current up to 100mA: Suitable for low to medium current applications.
• Internal Short-Circuit Current Limiting: Protects the regulator from damage due to short circuits.
• Thermal Overload Protection: Prevents the regulator from overheating and ensures reliable operation.
• No External Components Required: Simplifies circuit design and reduces component count.
• TO-92 Package: Compact and easy to mount.

Benefits:

• Stable Voltage Supply: Provides a regulated -12V output voltage, ensuring consistent performance of connected circuits.
• Overload Protection: Protects the regulator and connected components from damage due to short circuits or excessive current draw.
• Thermal Protection: Prevents overheating and ensures reliable operation in various environmental conditions.
• Simplified Design: Requires no external components, simplifying circuit design and reducing board space.
• Compact Size: The TO-92 package enables compact and efficient circuit layouts.
• Cost-Effective Solution: Provides a simple and affordable solution for negative voltage regulation.

Additional Details:

The TS79L12CY requires a negative input voltage slightly more negative than -12V to operate correctly. It is typically used with a heatsink or adequate airflow to dissipate heat, especially at higher input voltages and output currents. The device's internal protection features enhance its reliability and make it a suitable choice for various applications requiring a stable negative voltage supply. It is commonly used in conjunction with positive voltage regulators like the 78L12 to provide both positive and negative rails for analog circuits.