The TA79L09F is a three-terminal negative voltage regulator manufactured by Toshiba Semiconductor and Storage. This regulator provides a fixed -9V output voltage. It is part of the TA79L series, known for its low current output, compact size, and suitability for applications where board space is at a premium and a stable negative voltage source is needed.

Applications

• Low-Power Instrumentation: Powers sensitive analog circuitry in instruments requiring a stable -9V rail.
• Portable Audio Equipment: Provides the negative voltage supply for preamplifiers and other audio processing circuits.
• Sensor Interface Circuits: Powers sensor circuitry that requires a negative voltage for proper operation.
• Small Microcontroller Projects: Supplies the negative voltage needed by microcontrollers and supporting components in low-power applications.
• Analog Signal Processing: Used in circuits for filtering, amplification, and signal conditioning.

Features

• Fixed -9V Output Voltage: Simplifies power supply design by providing a pre-set negative voltage.
• Internal Short-Circuit Current Limiting: Protects the regulator from damage due to short circuits.
• Thermal Overload Protection: Shuts down the regulator when its temperature exceeds safe limits.
• Compact Package: Enables use in devices where space is limited.
• Low Quiescent Current: Minimizes power consumption in battery-powered devices.

Benefits

• Stable -9V Power Supply: Ensures consistent performance of electronic circuits requiring a negative voltage.
• Simplified Design: Reduces complexity in power supply design.
• Increased Reliability: Protection features prevent damage from overcurrent and thermal overload.
• Space-Saving Solution: Compact package allows for use in small electronic devices.
• Energy Efficiency: Low quiescent current helps extend battery life in portable applications.

Technical Specifications

The TA79L09F typically operates with an input voltage range of -11.5V to -27V. It can provide an output current of up to 100mA. The dropout voltage is typically around 1.7V. The operating junction temperature range is typically from -40°C to +125°C. Refer to the manufacturer's datasheet for detailed specifications, application notes, and recommended external components.