MAX6072BAUB25+

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Power Management Integrated Circuits (PMIC) are electronic systems that help regulate and monitor the performance of different types of electrical devices. Voltage Reference is an important component in such power management systems and can help maintain the integrity of electrical signals and the level of power that is delivered to the device. In this article, we will look at the application field and working principle of the MAX6072BAUB25+, a voltage reference from Maxim Integrated.

The MAX6072BAUB25+ is a low-power, low noise, bandgap voltage reference. It is designed for use in systems where low power and noise performance is critical, such as portable monitoring systems, voltage reference sources and precision analog circuitry. It is optimized for low noise, low drift and low offset, meaning it has a high accuracy and excellent linearity. The compact device has a wide operating temperature range of -40°C to 125°C and is available in MSOP-10 and SOT23-5 packages.

In terms of its application field, the MAX6072BAUB25+ is ideal for low-noise voltage references, regulated multi-level power supplies and low-noise DC/DC converters. It is used in medical, industrial and automotive applications and is suitable for both battery powered systems and applications that use an AC power source. In addition, it can be used for precision measurements such as those in strain gauges, thermocouples and gas pressure sensors.

The working principle of the MAX6072BAUB25+ is based on basic operational amplifier theory. It is a dual operational amplifier (U1 and U2) connected in a gain-setting configuration. Two resistors, R1 and R2 are used in the circuit and can be adjusted to establish the required voltage gain from Volt A to Volt B. The resistors also allow for low-noise operation by reducing output offset.

The voltage at Volt A is determined by the output of the amplifier, while the reference voltage at Volt B is determined by the use of a bandgap reference chip. This chip uses two Zener diode junction breakdowns and a base-emitter voltage of a bipolar transistor to generate a stable, low-noise voltage output that is independent of supply voltages and temperature variations. The bandgap reference produces a voltage of 0.8V, which is then added to the external reference voltage to determine the output voltage at Volt B.

The MAX6072BAUB25+ can operate with a wide range of supply voltages from 1.8V to 5.5V and has an output voltage range from 0.2V to 5.5V. It requires a low quiescent current draw of only 8μA, making it ideal for battery-operated systems. The device is protected against reverse current flow, over-temperature, over-current and ESD damage. In addition, it has over-voltage protection on output A and can be operated in either single or dual supply modes.

In conclusion, the MAX6072BAUB25+ is a low-power, low-noise voltage reference from Maxim Integrated designed for use in a variety of applications. It has a wide operating temperature range, low quiescent current draw, and is protected against damage from overvoltage, over temperature, over-current and ESD. The device is based on basic operational amplifier theory, with a gain-setting configuration of dual operational amplifiers, two resistors and a bandgap reference chip. It has a wide range of supply voltages and output voltages and can be used for precision measurements.

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