MCP1802T-1802I/OT

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MCP1802T-1802I/OT is a low quiescent current, low dropout linear regulator developed by Microchip Corporation.

The MCP1802T-1802I/OT is ideal for applications where large input voltage transients occur, inlcuding automotive, communications, industrial and computing systems. It is a highly efficient, low dropout voltage regulator which utilizes low quiescent current to help power system designers reduce cost, complexity and size. The device is capable of providing up to 1A (2 A in the 1802I) of output current without the need for an external pass device.

The MCP1802T-1802I/OT features an on-Chip temperature-compensated voltage reference which is capable of providing an output voltage of up to 7V. The device is available in a variety of fixed output voltages, allowing embedded designers to optimize their power conversion needs. It also has built-in short-circuit protection and over-temperature protection.

The MCP1802T-1802I/OT has a wide input voltage range and is capable of operating with an input voltage of up to 18V. Its low quiescent current of only 60 μA give designers assurance in their design and provide the flexibility to power a range of applications with ease. The device is also protected against reverse current and inrush current up to 5A, giving it superior protection for the system.

The working principle of the MCP1802T-1802I/OT is straightforward. The device utilizes an open-loop voltage mode PWM (Pulse Width Modulation) to generate an output voltage that is proportional to the set point voltage. The PWM signal input will cause the output voltage of the regulator to adjust its current output proportionally. The MCP1802T-1802I/OT has the ability to detect an output voltage drop or overshoot, and will then react accordingly, reducing or increasing its output current accordingly.

This device also combines the advantages of a linear regulator, such as improved system efficiency and no switching noise, with the low cost of a controller-regulated power system. This allows for a simple and efficient built-in power system optimization approach and allows the designer to give more attention to their design and less effort to system power considerations.

Overall, the MCP1802T-1802I/OT is a great choice for embedded applications that require low quiescent current, high efficiency, and robust protection features. The open loop PWM control, the automatic step-down protection against over current and the temperature protection features make it a reliable and cost-effective voltage regulator solution.

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