onsemi

MC78LC40HT1G

MC78LC40HT1G Description

The MC78LC40HT1G is a linear voltage regulator designed for applications requiring a fixed output voltage of 4V and a maximum output current of 65mA. Manufactured by onsemi, this device is part of the Power Management (PMIC) category and is housed in a Surface Mount package, specifically the SOT89-3. The regulator is designed to operate with an input voltage range up to 12V, ensuring compatibility with a wide range of power sources. Despite its small footprint, the MC78LC40HT1G offers robust performance with a low dropout voltage of 0.038V at 1mA, making it ideal for applications where efficiency and minimal power loss are critical.

MC78LC40HT1G Features

• Fixed Output Voltage: The MC78LC40HT1G provides a stable output voltage of 4V, ensuring consistent power delivery to connected devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.038V at 1mA, this regulator can maintain its output voltage even when the input voltage is close to the output voltage, enhancing efficiency.
• Low Quiescent Current: The device features a low quiescent current of 3.6 µA, which minimizes power consumption during operation, making it suitable for battery-powered applications.
• Single Regulator Design: The MC78LC40HT1G includes a single regulator, simplifying the design and reducing the complexity of the power management system.
• Positive Output Configuration: The regulator delivers a positive output voltage, which is suitable for applications requiring a positive supply voltage.
• Surface Mount Packaging: The SOT89-3 package allows for easy integration into compact designs, making it ideal for space-constrained applications.
• Moisture Sensitivity Level (MSL) 1: The device is classified as MSL 1, indicating it is not moisture-sensitive and can be stored and handled without special precautions.
• REACH Compliance: The MC78LC40HT1G is REACH unaffected, ensuring compliance with environmental and safety regulations.

MC78LC40HT1G Applications

The MC78LC40HT1G is well-suited for a variety of applications where a stable 4V supply and low power consumption are required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and low dropout voltage make this regulator ideal for portable devices and battery-operated systems where efficiency is crucial.
• Consumer Electronics: Applications such as smartphones, tablets, and other consumer electronics can benefit from the stable voltage regulation and compact design of the MC78LC40HT1G.
• Industrial Control Systems: The regulator can be used in various industrial applications where a reliable and efficient power supply is necessary.
• Medical Devices: The device's low power consumption and stable output voltage make it suitable for medical equipment that requires precise power management.

Conclusion of MC78LC40HT1G

The MC78LC40HT1G is a versatile and efficient linear voltage regulator designed to meet the demands of modern electronic systems. Its fixed 4V output, low dropout voltage, and low quiescent current make it an excellent choice for applications requiring stable power delivery and minimal power loss. The Surface Mount package and MSL 1 classification ensure ease of integration and handling, while REACH compliance guarantees adherence to environmental standards. Despite being marked as obsolete, the MC78LC40HT1G remains a reliable option for designers seeking a compact, efficient, and stable power management solution.