The LM7905S/TR is a three-terminal negative voltage regulator from HGSEMI, providing a fixed -5V output. As part of the LM79xx series, it is designed for applications requiring a regulated negative voltage supply. It offers built-in protection features, making it a robust choice for various electronic applications.

Applications

• Power supplies for operational amplifiers: Providing a stable -5V rail for op-amp circuits.
• Negative voltage regulation in mixed-signal systems: Supplying negative voltage for circuits with both positive and negative voltage requirements.
• Dual power supply designs: Creating a negative voltage rail in dual power supply configurations.
• Analog circuit power supplies: Regulating the negative voltage supply for analog circuits.
• Data acquisition systems: Powering components that require a -5V supply.

Features

• Output Voltage: Fixed -5V output.
• Output Current: Capable of delivering up to 1A output current with adequate heat sinking.
• Internal Thermal Overload Protection: Shuts down the regulator when the internal temperature exceeds a safe limit.
• Short Circuit Current Limiting: Protects the regulator and the load from damage in case of a short circuit.
• Output Transistor Safe-Area Compensation: Ensures stable operation even under varying load conditions.
• TO-263 Package: Surface mount package suitable for automated assembly.

Benefits

• Stable Output Voltage: Provides a consistent -5V output, ensuring reliable operation of connected devices.
• Simplified Power Supply Design: Requires minimal external components, reducing design complexity and cost.
• Enhanced System Reliability: Built-in protection features safeguard the regulator and the load from potential damage.
• Wide Operating Temperature Range: Suitable for use in a variety of environments.
• Easy to Use: Simple three-terminal configuration allows for quick and straightforward implementation.

Additional Details

The LM7905S/TR typically requires a minimum input voltage of around -7V to ensure proper regulation. A heat sink may be necessary when operating at higher output currents to dissipate the heat generated by the regulator. The device is commonly available in a TO-263 package, designed for surface mounting. Proper application of bypass capacitors at the input and output is recommended to improve stability and reduce noise. The exact specifications of the device should be verified in the manufacturer's datasheet.