ZXRE252BSA-7 Integrated Circuits (ICs)

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PMIC - Voltage Reference is one of the most essential power management integrated circuit (PMIC) components of any electronic system. It is used to accurately regulate and monitor a specific value of voltage. The ZXRE252BSA-7 is an excellent example of a Voltage Reference for PMIC applications. This article will explore the application field and working principle of the ZXRE252BSA-7.

Application Field of the ZXRE252BSA-7

The ZXRE252BSA-7 voltage reference is a highly accurate, low-power device. It is primarily used in power management applications such as battery management, power supply sequencing, and current sense monitoring. Additionally, the ZXRE252BSA-7 can be used in applications such as LED lighting, portable and remote electronics, automotive, and industrial control products.

The ZXRE252BSA-7 is designed to provide an accurate and stable reference voltage (1.22V) to suit various applications. Its wide input voltage range is from 1.8V to 5V, making it suitable for various power supplies. It has a low temperature coefficient of +/-20ppm/degC and a low noise voltage of +/-0.1mV. The ZXRE252BSA-7 also features a low quiescent current of 1.2uA, making it an energy-efficient reference device.

Working Principle of the ZXRE252BSA-7

The ZXRE252BSA-7 Voltage Reference is a three-terminal, integrated circuit, consisting of a temperature-compensating bandgap voltage reference and a precision resistor divider. The device is designed to provide an accurate reference voltage of 1.22V with an initial accuracy of +/-0.2%.

The internal bandgap voltage reference is formed by a pair of diodes connected in series and a pair of clipping diodes in parallel. The reference voltage is created by the difference in forward drop of the two diodes when the current flow is reversed. The clipping diodes limit the current to a safe level, preventing the ZXRE252BSA-7 from damage due to excessive current flow. The resistor divider is used to reduce the reference voltage to the desired level.

The ZXRE252BSA-7 also features a precision amplifier which operates similarly to a switching regulator. It monitors and regulates the output voltage, thereby providing accurate reference values throughout the specified input voltage range. The amplifier also amplifies any noise present in the input voltage, ensuring low noise voltage.

To sum up, the ZXRE252BSA-7 voltage reference is an excellent choice for PMIC applications due to its superior accuracy, low noise, and low-power consumption. It is a highly efficient and economical device that is suitable for a wide range of applications.

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