onsemi

LM7910CT

LM7910CT Description

The LM7910CT is a fixed negative output voltage regulator designed for applications requiring a stable -10V supply with a maximum output current of 1A. Manufactured by onsemi, this linear regulator is housed in a TO220-3 package and features a dropout voltage of 2V at 1A (typical). It operates within a temperature range of 0°C to 125°C and has a quiescent current of 6 mA. The regulator provides robust protection features, including over-temperature and short-circuit protection, ensuring reliable operation under various conditions. Despite being marked as obsolete, the LM7910CT remains a viable option for legacy systems and specific applications where its unique characteristics are advantageous.

LM7910CT Features

• Fixed Negative Output Configuration: The LM7910CT is specifically designed for negative voltage regulation, providing a stable -10V output ideal for applications requiring negative supply rails.
• High Output Current Capability: With a maximum output current of 1A, the regulator can support demanding applications that require significant power delivery.
• Low Dropout Voltage: The typical dropout voltage of 2V at 1A ensures efficient operation even at lower input voltages, making it suitable for applications with tight voltage margins.
• Robust Protection Features: Over-temperature and short-circuit protection mechanisms safeguard the regulator and connected circuits from potential damage, enhancing overall system reliability.
• Wide Operating Temperature Range: The regulator operates reliably from 0°C to 125°C, making it suitable for a wide range of industrial and commercial applications.
• Low Quiescent Current: A quiescent current of 6 mA minimizes power consumption during standby or low-load conditions, contributing to energy efficiency.
• High Power Supply Rejection Ratio (PSRR): With a PSRR of 60dB at 120Hz, the regulator effectively filters out noise and ripple from the input power supply, ensuring clean output voltage.
• Through Hole Mounting: The through-hole mounting type facilitates easy integration into printed circuit boards and ensures mechanical stability in various operating environments.
• Moisture Sensitivity Level (MSL): MSL 1 (unlimited) indicates that the regulator is not sensitive to moisture, reducing the risk of damage during handling and storage.

LM7910CT Applications

The LM7910CT is well-suited for a variety of applications where a stable -10V supply is required. Specific use cases include:

• Industrial Control Systems: Providing a reliable negative voltage supply for analog circuits, sensors, and control modules.
• Power Amplifiers: Supplying stable negative voltage rails for audio amplifiers and other power-sensitive applications.
• Telecommunications Equipment: Ensuring stable power delivery for negative voltage requirements in communication systems and infrastructure.
• Medical Devices: Supporting medical equipment that requires precise and stable negative voltage supplies for critical functions.
• Legacy Systems: Ideal for maintaining and upgrading older systems where the LM7910CT's specific voltage and current capabilities are essential.

Conclusion of LM7910CT

The LM7910CT is a versatile and reliable negative voltage regulator that offers a range of performance benefits and protection features. Despite its obsolete status, it remains a valuable component for applications requiring a stable -10V supply with high current capability. Its low dropout voltage, wide operating temperature range, and robust protection mechanisms make it a dependable choice for various industrial and commercial applications. For designers and engineers working with legacy systems or specific applications that demand a fixed negative output voltage regulator, the LM7910CT is an excellent option to consider.