VRE205MA

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VRE205MA Application Field and Working Principle

PMIC, or Power Management ICs, are devices used to optimize the efficiency and safety of power in various systems. They include voltage regulators, voltage references, power converters, and even motor control solutions. Voltage references, specifically, are a class of precision devices that provide a stable reference voltage in a range of applications. The VRE205MA is a specialized Trim Voltage Reference from STMicroelectronics, designed for applications requiring an extremely low power consumption and high accuracy. This article will focus on the application fields and working principles of the VRE205MA.

Application Fields

The VRE205MA is a low drop voltage reference, with a low power consumption of only 2 μA. As such, it is suited for use in battery-powered applications, and is popularly used in portable medical equipment, IoT sensors, and other products requiring a small size and low current draw. Furthermore, its precision and stability make it especially suitable for automotive environments, where it is used in engine control units (ECUs), among other applications. Aside from its low power consumption, the VRE205MA is also noted for its low output noise and excellent accuracy, with a tolerance up to ±0.2%.

Working Principle

The VRE205MA works by using a resistor-divider network to generate a stable reference voltage. It consists of three resistors: a reference resistor, a feedback resistor, and a feedforward resistor. The reference resistor is the first to be bypassed by the VRE205MA’s internal current source. The current then flows through the feedback resistor, creating a voltage drop. The feedforward resistor then multiplies the voltage drop, and the result is the final output voltage of the VRE205MA. This output voltage is controlled by adjusting the three resistors, which is accomplished by trimming the device in a facility.

In terms of its features, the VRE205MA offers excellent temperature accuracy, with a temperature coefficient of only 25 ppm/°C. It also comes with an integrated 10 μA output current delivery capability and shutdown function, as well as an input ripple rejection of 1 µVpp/V. Additionally, it features ESD protection up to 2000 V.

Conclusion

The STMicroelectronics VRE205MA is a specialized Trim Voltage Reference designed for applications requiring high precision, accuracy and low power consumption. Its low output noise, excellent performance and integrated features make it an ideal choice for use in automotive and battery-powered applications, such as medical equipment and IoT sensors. Furthermore, its working principle is based on a resistor-divider network that adjusts the output voltage via trimming, allowing for high accuracy and stability.

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