The TS79L18CS is a 3-Terminal Negative Voltage Regulator from Taiwan Semiconductor. It's designed to provide a fixed -18V output voltage for a variety of electronic applications. This regulator is part of the TS79Lxx series, known for their simplicity and ease of use in providing regulated negative voltage.

Applications

• Linear Power Supplies: Used in simple power supplies where a stable -18V output is needed.
• Instrumentation: Provides a regulated negative voltage for operational amplifiers and other analog circuitry in measurement equipment.
• Local Regulation: Can be used for on-card regulation to minimize noise and distribution problems.
• Industrial Control Systems: Supplies a stable voltage to sensitive components in industrial automation equipment.
• Audio Amplifiers: May be used in older audio equipment requiring negative voltage rails.

Features

• Fixed Output Voltage: Provides a stable -18V output.
• Internal Short-Circuit Current Limiting: Protects the regulator and the load from damage due to short circuits.
• Thermal Overload Protection: Shuts down the regulator if the junction temperature exceeds a safe limit.
• Output Transistor Safe-Area Compensation: Ensures safe operation under various load conditions.
• Small Package: Typically available in a TO-92 package, making it suitable for compact designs.

Benefits

• Simple to Use: Requires minimal external components for operation.
• Cost-Effective: Provides a low-cost solution for regulated negative voltage.
• Reliable: Offers robust protection features to prevent damage.
• Stable Output: Maintains a consistent -18V output voltage under varying load and input voltage conditions.
• Compact Design: The small package allows for integration into space-constrained applications.

Technical Specifications

The TS79L18CS has an input voltage range typically up to -30V. It can deliver an output current of up to 100mA. It features thermal shutdown and short-circuit protection. The operating junction temperature ranges from 0°C to +125°C. The device typically requires only input and output capacitors for stable operation. The dropout voltage is relatively low, allowing it to function effectively even with slightly lower input voltages. The quiescent current is also low, which improves efficiency, especially in battery-powered applications.