The 79M09A is a 3-Terminal Negative Voltage Regulator manufactured by New Japan Radio (NJR). It provides a fixed -9V output voltage and is designed for a wide range of applications requiring a stable negative voltage supply.

Applications:

• Negative Voltage Regulation: Provides a stable -9V output for circuits requiring a negative power supply.
• Linear Regulators: Used in linear power supplies to regulate voltage and reduce ripple.
• Local Regulation: Suitable for on-card regulation in electronic systems.
• Instrumentation: Employed in test and measurement equipment requiring a precise -9V reference.

Features:

• Fixed -9V Output: Provides a stable and accurate -9V output voltage.
• Internal Short-Circuit Protection: Protects the regulator from damage due to short circuits.
• Internal Thermal Overload Protection: Prevents overheating and potential damage to the regulator.
• Output Transistor Safe-Area Compensation: Enhances the reliability and stability of the regulator.

Benefits:

• Stable Voltage Supply: Ensures consistent performance of connected electronic circuits.
• Enhanced System Reliability: Protection features prevent damage and ensure long-term system operation.
• Simplified Circuit Design: Requires minimal external components, simplifying circuit design.
• Cost-Effective: Offers a low-cost solution for negative voltage regulation.

Technical Specifications:

The 79M09A has an input voltage range of -11V to -35V and provides a fixed -9V output voltage with a typical output current of 500mA. It features internal short-circuit and thermal overload protection. It is typically available in a TO-220 or similar package.