onsemi

MC78L09ACDG

MC78L09ACDG Description

The MC78L09ACDG is a fixed positive linear voltage regulator designed for applications requiring a stable 9V output with a maximum input voltage of 30V. Manufactured by onsemi, this regulator is part of the Power Management (PMIC) category and is housed in a surface-mount 8SOIC package. Despite being marked as obsolete, the MC78L09ACDG remains a reliable choice for specific applications due to its robust design and performance.

MC78L09ACDG Features

• Output Type: Fixed positive output voltage of 9V.
• Input Voltage Range: Capable of handling input voltages up to 30V, ensuring compatibility with a wide range of power sources.
• Output Current: Delivers a consistent 100mA of output current, suitable for low-power applications.
• Low Quiescent Current: Features a low quiescent current of 6mA, which is beneficial for energy-efficient designs.
• High PSRR: Offers a high power supply rejection ratio (PSRR) of 57dB at 120Hz, ensuring minimal noise and ripple in the output voltage.
• Protection Features: Includes over-temperature and short-circuit protection, safeguarding the regulator and connected components from damage.
• Operating Temperature Range: Functions reliably within an operating temperature range of 0°C to 125°C, making it suitable for both industrial and consumer applications.
• Moisture Sensitivity Level: MSL 1 (Unlimited), indicating it is not sensitive to moisture, which is advantageous for manufacturing processes.
• Compliance: REACH Unaffected, ensuring compliance with environmental and safety regulations.

MC78L09ACDG Applications

The MC78L09ACDG is ideal for a variety of applications where a stable 9V supply is required. Its low quiescent current and high PSRR make it particularly suitable for battery-operated devices and low-power consumer electronics. The regulator's robust protection features and wide operating temperature range also make it a reliable choice for industrial applications. Specific use cases include:

• Battery Chargers: Providing a stable voltage for charging batteries in portable devices.
• Consumer Electronics: Supplying power to low-power components in devices such as radios, calculators, and small appliances.
• Industrial Equipment: Ensuring reliable power supply in industrial control systems, sensors, and other low-power applications.
• Telecommunications: Used in low-power communication devices and modems where a stable voltage is crucial for consistent performance.

Conclusion of MC78L09ACDG

The MC78L09ACDG, despite being obsolete, remains a viable option for applications requiring a stable 9V output with low quiescent current and high PSRR. Its robust protection features and wide operating temperature range make it a reliable choice for both consumer and industrial applications. While newer alternatives may offer additional features, the MC78L09ACDG's proven performance and compatibility with existing designs ensure it continues to be a valuable component in the power management landscape.