MAX6138BEXR21+T

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The MAX6138BEXR21+T is an integrated circuit (IC) which belongs to the voltage reference class of power management integrated circuits (PMICs). It is designed to provide a stable and accurately adjustable voltage reference output. The device achieves an output voltage accuracy of ± 0.25% and is suitable for a wide range of applications, including industrial, automotive and consumer electronics.

The MAX6138BEXR21+T features a low operating current of about 250µA, a very low temperature coefficient and a high speed of 1ms overall response time. A temperature compensation scheme incorporated into the device ensures low output drift, thus allowing the device to maintain a stable output voltage over a wide range of temperatures and frequencies. The wide operating temperature range of this device (40°C to +85°C) makes it suitable for automotive and industrial applications.

The MAX6138BEXR21+T has an integrated series transistor which provides additional voltage headroom, allowing the output voltage to be adjusted beyond the recommended operating range of the device. The device has over-voltage protection and low current-sink capability. The four available output stages are: low power, natural resistance, pulsed-load and low- noise operation.

As far as applications are concerned, the MAX6138BEXR21+T is suitable for use in a wide range of applications. These include voltage regulators, industrial, automotive, battery management systems, hold-up controls and other voltage sensitive devices. The MAX6138BEXR21+T has two main application fields:

• Regulating Voltage – In this context, the MAX6138BEXR21+T is used to provide a regulated output voltage with a high stability over temperatures and frequencies.
• Hold-up Control – This application area is more related to battery management systems, where the MAX6138BEXR21+T will provide a constant voltage despite the changing battery voltage.

The MAX6138BEXR21+T is equipped with a highly reliable operating principle. The device has four separate outputs which are referenced to an internal voltage reference. The outputs are interconnected to provide the required regulated output voltage. A high impedance differential amplifier is used to sense the output voltage, and the circuit will then adjust the reference voltage accordingly. The speed and accuracy of the regulation is dependent on the external components selected and their associated DSP performance.

The MAX6138BEXR21+T also features an integrated temperature sensor which allows the regulation accuracy to be improved through its temperature compensation scheme. Additionally, the device can be used as a shunt regulator, where it can reduce the current drawn from the power source in order to maintain the required output voltage.

In conclusion, the MAX6138BEXR21+T is a highly reliable integrated circuit which belongs to the power management integrated circuits (PMICs) class of voltage references. It is designed to provide a stable and accurately adjustable voltage reference output, suitable for a range of applications. This device works on an efficient principle and is equipped with temperature compensation and over-voltage protection capabilities.

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