MIC2214-MMBML-TR

MIC2214-MMBML-TR Voltage Regulator Linear: Application Field and Working Principle

The MIC2214-MMBML-TR is a high-performance, low voltage, low quiescent current linear regulator specifically designed for battery-powered applications where minimum dropout voltage and low power consumption are essential. The device has an adjustable output voltage range from 1.225V up to 11V, independent of the input voltage, that makes it suitable for a wide range of applications. This linear regulator can deliver up to 500mA of output current with a maximum dropout voltage of 300mV, making it suitable for powering high-current devices. Moreover, the device has a low quiescent current of 150μA and a high-impedance enable (EN) pin for power-up/down control.

The linear regulator is capable of providing up to 1A of continuous output current with a maximum dropout voltage of 200mV. Additionally, the device has a maximum quiescent current of 500μA and a low shutdown current of 1μA, making it an ideal choice for applications that require low quiescent and shutdown current. Additionally, the device has a wide operating temperature range of -40°C to +125°C and is available in a miniature SOT-89 package.

Application Field

The MIC2214-MMBML-TR linear regulator is ideal for powering portable consumer electronics such as mobile phones, digital cameras, and MP3 players. The device’s low quiescent current and small package size make it an ideal choice for these applications. Additionally, the device is well-suited for powering Cree XM-L LED flashlight due to its high current capability and wide output voltage range. The device can also be used in batched wireless communications, embedded systems, and automotive applications where low current consumption and low output voltage are important.

Working Principle

The MIC2214-MMBML-TR works by using a voltage divider to reference the output voltage. In simplest terms, the voltage regulator takes a higher voltage input voltage into its two terminals and connects the other two terminals to a power output. The reference voltage is compared to a feedback voltage obtained from the output of the load. If the output voltage is lower than the reference voltage, the regulator will compensate for this difference by providing more current to the output. Conversely, if the output voltage is higher than the reference voltage, the regulator will decrease the current flowing to the load to reduce the output voltage. This is known as the load regulation. Thus, by adjusting the reference voltage, the regulator can adapt to different power outputs and input voltages.

The MIC2214-MMBML-TR also has a wide range of protections to increase system reliability, including output current limiting, thermal shut-down, and reverse current protection. It is important to note that the thermal shut-down temperature is factory preset; however, this can be adjusted using an external resistor. Furthermore, the device operates over the wide temperature range of -40°C to +125°C, making it suitable for a variety of extreme temperature applications.

Conclusion

The MIC2214-MMBML-TR linear regulator is a high-performance, low voltage, low quiescent current and high dropout voltage voltage regulator for applications where minimum dropout voltage and low power consumption are essential. The device has an adjustable output voltage range from 1.225V up to 11V, independent of the input voltage, and can deliver up to 500mA of output current with a maximum dropout voltage of 300mV and a quiescent current of 150μA. The device has low quiescent current and shutdown current, making it an ideal choice for portable and high current applications. Furthermore, the device has a wide operating temperature range of -40°C to +125°C, making it suitable for a variety of extreme temperature applications.