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MCP1811AT-040/TT

MCP1811AT-040/TT Description

The MCP1811AT-040/TT is a linear voltage regulator designed by Microchip Technology, offering a fixed output voltage of 4V with a maximum output current of 150mA. This regulator is housed in a compact SOT23-3 package, making it suitable for surface mount applications. It features a maximum input voltage of 5.5V and a dropout voltage of 0.6V at 150mA, ensuring efficient operation even at low input-to-output voltage differentials. The regulator includes an enable control feature and over-current protection, enhancing its reliability and versatility in various electronic designs. Despite its small size, the MCP1811AT-040/TT boasts a low quiescent current of 0.5 µA and a power supply rejection ratio (PSRR) of 50dB at 1kHz, making it ideal for low-power applications. However, it is important to note that this product is now obsolete, and engineers should consider this status when selecting components for new designs.

MCP1811AT-040/TT Features

• Fixed Output Voltage: Provides a stable 4V output, ensuring consistent performance in applications requiring a fixed voltage supply.
• High Efficiency: With a dropout voltage of 0.6V at 150mA, the MCP1811AT-040/TT operates efficiently, minimizing power loss and heat generation.
• Low Quiescent Current: At 0.5 µA, the quiescent current is exceptionally low, making this regulator ideal for battery-powered devices and other low-power applications.
• Enable Control: The enable feature allows for dynamic control of the regulator's operation, enabling power-saving modes and flexible circuit design.
• Over-Current Protection: Built-in protection ensures the regulator can handle over-current conditions without damage, enhancing reliability and longevity.
• Compact Design: The SOT23-3 package is suitable for surface mount applications, saving space on PCBs and allowing for dense circuit layouts.
• High PSRR: A power supply rejection ratio of 50dB at 1kHz helps filter out noise from the input supply, resulting in a cleaner output voltage.

MCP1811AT-040/TT Applications

The MCP1811AT-040/TT is well-suited for a variety of applications where a stable, low-power voltage supply is required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and efficient operation make this regulator ideal for portable electronics, such as handheld devices, remote sensors, and wearable technology.
• Low-Power Embedded Systems: In applications where power consumption is critical, the MCP1811AT-040/TT can provide a reliable voltage supply without significant power loss.
• Industrial Control Systems: The compact size and over-current protection make it suitable for use in control boards and other industrial applications where space and reliability are paramount.
• Consumer Electronics: The regulator can be used in various consumer products, such as smart home devices, where a stable voltage supply is necessary for consistent performance.

Conclusion of MCP1811AT-040/TT

The MCP1811AT-040/TT is a versatile and efficient linear voltage regulator that offers a fixed 4V output with a maximum current of 150mA. Its low dropout voltage, low quiescent current, and high PSRR make it an excellent choice for low-power applications. The enable control and over-current protection features further enhance its reliability and flexibility. While the product is now obsolete, it remains a notable example of Microchip Technology's commitment to delivering high-performance components for a wide range of electronic applications. Engineers and designers should consider the MCP1811AT-040/TT's unique features and benefits when selecting components for their projects, especially in applications where low power consumption and efficient operation are critical.