MIC69302WU-TR

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MIC69302WU-TR Voltage Regulator

Linear voltage regulators, like the MIC69302WU-TR, provide a straightforward way to ensure that a predetermined voltage is delivered to an application’s load. Regulators provide safety advantages since they can protect circuits, extending their life and reducing the interruption of service due to component failure.

Application Field

The MIC69302WU-TR, an adjustable low dropout linear regulator, is ideal for applications that require high current or stringent voltage regulation accuracy. It is suitable for computer memory and communication systems, automotive, battery-powered and portable devices,A/V DACs, industrial and High-power LED regulators and also instrumentation applications.

Working Principle

The MIC69302WU-TR has an input voltage range from 6 V up to 30 V. The adjustable output voltage (1.23 V up to 28 V) can be finely adjusted by using an external Shunt Regulator. The maximum load current for the device is 2 A, with a maximum power dissipation of 10 W in SOIC-8 package. It also features an internal thermal shutdown protection and a current limit protection.

This linear voltage regulator incorporates an error amplifier which provides the output voltage control with its out put pin connected to the desired output voltage through an external resistor divider network. This simple configuration is the most common method to control the output voltage in linear voltage regulate.

An ideal voltage regulator requires a zero impedance output; however, in a practical voltage regulator, internal resistance and external resistance of the load current also contribute to the output impedance. The MIC69302 can also be compensated by a feedback loop in order to reduce the output impedance and thus provide better load regulation and reduce possible output noise.

An additional pin, named “CE(Enable)”, is present in the MIC69302WU-TR voltage regulator. It is used to disable the device when connected to “high” voltage, it reduces the standby current to 1 µA and suspends the operation of the regulator, thus decreasing the power consumption of the system.

Conclusion

The MIC69302WU-TR voltage regulator is a versatile device, suitable for a variety of applications. Its output voltage can be easily adjusted using an external feedback network, to provide a precise and stable output. Its low dropout voltage and high current rating allows it to be used in high power applications. Finally, the CE(ENABLE) pin makes it suitable for low power operation.

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