MIC3975-1.8BMM

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The MIC3975-1.8BMM is an upgraded version of the MIC3975 series of low dropout (LDO) voltage regulators manufactured by the semiconductor fabrication company, Micrel. Due to its low quiescent current, high accuracy, and fast response, the MIC3975-1.8BMM is suitable for a variety of applications, including microprocessors, controllers, and power management modules. This article will provide an overview of the MIC3975-1.8BMM’s application field and working principle.

Application Field

The MIC3975-1.8BMM device is a low-cost and low-dropout linear voltage regulator that is capable of supplying a fixed output voltage of +1.8V. This voltage regulator is ideal for a wide range of applications where a regulated output is needed. The MIC3975-1.8BMM can be used in voltage regulator applications that require a cost effective, intelligent power management solution. Examples of such applications include microprocessors, microcontrollers, and other ASICs that require a regulated DC voltage as input.

The MIC3975-1.8BMM can also be used in trimming applications due to its built-in trimming function that offers users a wide range of output voltages, from +1.8V to +20V. This makes the device ideal for powering systems that require precise voltage regulation.

In addition, the MIC3975-1.8BMM has an integrated on-chip power good flag that signals when the voltage has dropped below a set threshold. This feature prevents system malfunction when under-voltage conditions occur and makes the MIC3975-1.8BMM ideal for mission-critical applications, such as medical and aerospace systems.

Working Principle

The MIC3975-1.8BMM is a linear voltage regulator that utilizes a low-dropout three-terminal design. It offers a regulated voltage output in the range of +1.8V to +20V, and a maximum output current of 250mA. The MIC3975-1.8BMM is a low-cost solution due to its low quiescent current and the use of an integrated low-dropout pass transistor, which helps to reduce the overall component count.

The MIC3975-1.8BMM is designed to operate with an input voltage range of +4V to +50V and can provide a regulated output voltage of less than 0.2V to as high as +20V. The device is capable of providing a regulated output that is within a tolerance range of ±1.5%. The regualr output current is limited by an on-chip current limiter, allowing the device to regulate the output current based on the load.

The MIC3975-1.8BMM also features an on-chip low-dropout voltage limiter, which limits the output voltage when the device is overloaded. This protects the device from over-voltage conditions, as well as protecting the system from being damaged. The device also features an on-chip trimming circuit, which allows users to adjust the output voltage from a wide range of values, from +1.8V to +20V.

The MIC3975-1.8BMM is also equipped with several protection features, including input over-voltage protection, output over-current protection, and thermal shutdown protection. These features help to ensure optimal performance, as well as reliability and safety of the device.

Conclusion

The MIC3975-1.8BMM is a low-cost and reliable linear voltage regulator that can be used in a variety of applications, including microprocessors, controllers, and power management modules. The device offers low quiescent current, high accuracy, and fast response, as well as protection features to ensure optimal performance, reliability, and safety. The MIC3975-1.8BMM also offers an adjustable trimming function, allowing users to adjust the output voltage from +1.8V to +20V.

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