MCP1804T-A002I/MT

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MCP1804T-A002I/MT is a voltage regulator, a type of power management integrated circuit (PMIC) used to control or regulate the voltage within a circuit. It is a linear dropout regulator, providing a regulated output voltage that is lower than its input voltage by a fixed voltage drop ranging from 300mV to 600mV. The MCP1804T-A002I/MT offers a variety of features, such as internal current limits, thermal shutdown, an adjustable output voltage, and an enable input.

Applications

The MCP1804T-A002I/MT is designed to solve a variety of applications in both industrial and consumer markets. It can be used to control power for computer CPUs, GPUs, and other integrated circuits; power battery management systems; and regulate standby power for AC/DC adapters and chargers. Additionally, due to its current and thermal shutoff, it can be used as a low-dropout linear regulator in any regulated output application, as long as the output voltage can lie within the 300mV to 600mV range.

Working Principle

The MCP1804T-A002I/MT works by controlling the voltage drop and current flow through the linear regulator’s pass element (usually an N-Channel MOSFET). When the pass element is on, the voltage across the device is equal to the input voltage minus the regulation voltage drop (300mV to 600mV). When the pass element is off, no current is allowed to flow through the regulator, guaranteeing a low quiescent current of 15µA (typical).

The MCP1804T-A002I/MT can be put into a state to achieve the highest efficiency and prolong battery life. When the output load is light, the device uses the Burst Mode® feature to reduce its quiescent current from 150µA (max) to 15µA (typical). It also has a transition time of 100µs (typical) between the Burst Mode® operation and the normal operation, ensuring fast and reliable transition to light load conditions.

This device has an internal current-limit feature that reduces power dissipation and ensures device protection. The current limit is set based on the output load and remains constant regardless of the input voltage; however, it can be adjusted externally with the addition of a sense resistor. The maximum output current is 1.5A. This voltage regulator is designed to stay functional between -40°C to +125°C environmental temperatures with a 0.3V dropout voltage.

Conclusion

The MCP1804T-A002I/MT is a linear dropout regulator versatile enough to be used in a wide range of applications. Its features, such as the low quiescent current, the current-limit functionality and the adjustable voltage output, ensure that the device can be used in a variety of applications, including computer CPUs and GPUs, battery management systems, and AC/DC adapters and chargers. In addition, its thermal shutdown and current limit features ensure that critical components are protected against overheating and overcurrent conditions.

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