MCP1790-5002E/DB

MCP1790-5002E/DB Application Field and Working Principle

MCP1790-5002E/DB is a fixed output linear voltage regulator module, optimized for low-current, low-dropout (LDO) applications developed by Microchip. This high-performance device provides all of the features, protection and flexibility necessary for modern supply-rail applications.

Application Field

MCP1790-5002E/DB is designed for applications such as portable handheld devices, cellular telephones, barcode scanners, embedded systems, telecom systems, automotive systems and other electronic equipment. It is designed with a high-precision, on-board voltage reference, which allows for extremely low-output voltage drift over temperature and time.

Furthermore, its low quiescent current makes MCP1790-5002E/DB an ideal regulator for low-power designs such as battery-powered applications. The device can deliver up to 400 mA of output current, and is protected by on-board thermal protection and over-current protection.

Working Principle

MCP1790-5002E/DB is a linear regulator. It operates on a series regulator principle, which requires an input voltage greater than the output voltage by a certain amount called the “dropout voltage” in order to operate correctly. MCP1790-5002E/DB features an extremely low dropout voltage, allowing for operation with very little input voltage overhead.

The device takes in the input voltage from the power source and regulates it to the desired output voltage by dissipating the excess voltage as heat. The regulation is achieved by comparing the reference voltage from an integrated band gap voltage reference with the voltage at the output terminal. During normal operation, the output voltage is set by an external resistor connected between the adjustment terminal and ground.

Output current is regulated by controlling the on-board pass transistor, which shorts the output voltage when the output current is too high. MCP1790-5002E/DB is protected against current overload and thermal over-load by using an on-board current monitoring circuit and a built-in thermal shutdown circuit.

Conclusion

Microchip\'s MCP1790-5002E/DB is a high-precision, high-performance linear voltage regulator module optimized for low-current, low-dropout (LDO) applications. It features a low quiescent current, a high-precision integrated band gap voltage reference, and protection against current overload and thermal overload. It is suitable for applications such as portable handheld devices, cellular telephones, barcode scanners, embedded systems, telecom systems, automotive systems and other electronic equipment.