The TA79020S is a three-terminal negative voltage regulator produced by Toshiba Semiconductor and Storage. This regulator provides a fixed -20V output voltage, making it suitable for various applications that require a stable negative power supply. The TA79 series is known for its robust design, ease of use, and integrated protection features.

Applications

• Instrumentation and Measurement Equipment: Powers sensitive analog circuitry in instruments that require a precise negative voltage.
• High-Voltage Operational Amplifiers: Provides the necessary negative supply rail for op-amps operating at higher voltage levels.
• Industrial Power Supplies: Used in industrial control systems to supply reliable power to specific components.
• Specialized Audio Equipment: Powers preamplifiers and other audio processing circuits needing a -20V rail.
• Testing and Calibration Setups: Provides a stable and accurate negative voltage reference for calibration purposes.

Features

• Fixed -20V Output Voltage: Simplifies power supply design by providing a pre-set negative voltage.
• Built-In Short Circuit Protection: Limits the output current during short circuit conditions, protecting the regulator.
• Thermal Overload Protection: Prevents damage by shutting down the regulator when its temperature exceeds safe limits.
• Excellent Ripple Rejection: Minimizes output voltage ripple, ensuring a clean and stable power supply.
• TO-220 Package: Allows for efficient heat dissipation through the use of heat sinks.

Benefits

• Stable and Reliable Negative Voltage: Ensures consistent performance of circuits requiring a -20V supply.
• Simplified Circuit Design: Reduces the complexity of power supply implementations.
• Increased System Robustness: Protection features prevent damage from overcurrent and overheating.
• Easy to Implement: Requires few external components, simplifying the design process.
• Cost-Effective Solution: Provides a reliable -20V regulated voltage at an economical price.

Technical Specifications

The TA79020S accepts an input voltage typically ranging from -23V to -40V. It can deliver an output current of up to 1A, provided appropriate heat sinking is employed. The dropout voltage is typically around 2V. The device operates within a junction temperature range of -40°C to +125°C. For detailed specifications, application notes, and heat sink recommendations, consult the manufacturer's datasheet.