MIC2214-AABML-TR

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MIC2214-AABML-TR Application Field and Working Principle

The MIC2214-AABML-TR is a Linear Voltage Regulator (LVR) commonly used in Power Management Integrated Circuits (PMIC). PMICs are designed to simply the task of managing the power requirements of a circuit while performing some kind of application and they come with various types of components, and Linear Voltage Regulators are among them.

The MIC2214-AABML-TR is particularly suited for applications in which variable amounts of load current is to be managed, and that require a high accuracy of regulated output voltage. It is a three-terminal device and it is the latest generation of high performance, low dropout linear regulators in the MIC22XX family of ICs. It comes with a range of features such as:

• Low dropout voltage (230mV maximum at full load current).
• High line and load regulation (better than 0.1% over line and temperature range).
• Output voltage accuracy of 0.75%.
• Low quiescent current (10µA typical).
• Integrated Short Circuit protection and Thermal Shutdown (TSD).
• High Output Voltage Adjustment Range.

Apart from these features, the device is also quite small in size and is offered in a miniaturized 16-pin QFN package. The device also comes with an Over Temperature Protection (OTP) feature which helps in ensuring robust temperature performance.

Working Principle

The MIC2214-AABML-TR uses the conventional Linear Voltage Regulation principle to regulate the output voltage of the device. The Output Voltage of the device is determined by the setting of the Feedback Voltage Divider. The Input Supply Voltage is compared to the feedback voltage and if the two are not equal, an error signal is produced. This error signal is used to drive the internal PMOS device which regulates the Output Voltage.

When the Load Current of the device increases, the Output Voltage will drop below its intended value. The output voltage drop is reduced proportional to the Gain of the device which is controlled by the current return path of the feedback circuit. The current return path of the feedback circuit is designed to provide a delicate balance of output voltage accuracy and transient response while the output voltage is being changed. The balancing of the gain of the feedback loop is essential to the proper operation of the device.

Apart from regulating the output voltage of the device, the MIC2214-AABML-TR also provides two additional functions. The first is the Over Temperature Protection (OTP) which activates when the temperature of the device reaches a certain level. The second is the Short Circuit protection which actives when the output voltage is forced to a point at which the device is unable to operate properly.

In conclusion, MIC2214-AABML-TR is a small yet powerful linear voltage regulator from the MIC22XX family of ICs. The device comes with a range of features and is able to provide the high accuracy of regulated output voltage in applications which require variable amounts of load current.

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