MAX664CPA

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The MAX664CPA is a voltage regulator from the family of linear PMIC regulators. It\'s a very versatile device, with a wide set of applications. In this document, we will take a closer look at the applications and working principle of this voltage regulator.

Application Field

The MAX664CPA is a high-resolution monolithic IC that contains a voltage reference and a single resistor-programmable current source. It allows the user to set a precise output current to any value between 1 mA and 350 mA. This makes it suitable for applications that require highly accurate current output. For example, it can be used in system-level power supply designs to provide a well-regulated output current. It can also be used as a precision current source for laboratory equipment and instrumentation.

The device is also suitable for accurate monitoring of galvanic current systems. It can be used to measure and control the current going through a given load. This makes it very useful in the automotive industry, where it is often used for battery management and traction control systems.

The MAX664CPA is also a great choice for hearing aid applications. It can be used to power the microphone, speaker, and other components of hearing aids. It is designed to be highly noise-immune and provides a low-dropout voltage of 600 mV from a 1.8 V output. This makes it well-suited for hearing aid applications where a tight voltage regulation requirement is needed.

Working Principle

The MAX664CPA consists of a voltage reference and a current source. The voltage reference provides a stable output voltage which is used to set the current to the desired value. The current source then sinks a proportionate amount of current to maintain the desired output voltage.

In order to program the voltage output, a resistor is connected between the device’s ground pin and the output pin. The resistance of the resistor determines the output current. When the resistor reaches a certain value, the current source will adjust to maintain the desired voltage.

The device also includes protection features such as a built-in current limiter, short circuit detection and open loop detection. When the voltage output exceeds the desired value, the device will turn off the current source and maintain the output voltage. This ensures that the circuit stays safe, even if the resistor value is changed.

Conclusion

The MAX664CPA is a high-resolution voltage regulator from the family of PMIC-linear voltage regulators. It’s a versatile device that offers a wide range of applications from hearing aid to automotive industries. Its adjustable current source enables accurate output current measurements and control, making it a great choice for various applications. Its additional protection features and low dropout voltage make it even more attractive as a voltage regulator choice.

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