REF02RC/883C

PMIC - Voltage Reference

Voltage references play an important role in power management, providing a static voltage for the regulator module use to compare and adjust the output voltage that delivers to the load. The REF02RC/883C is a dual, high-precision CMOS Based shunt bandgap reference which provides excellent temperature drift, supply rejection, and initial accuracy. With a wide input voltage from 4V to 36V, current output of up to 3mA, settling time of 0.02ms, and a high temperature tolerance of 0C to 125C, it is suitable for a wide range of power management applications.

REF02RC/883C Application Field

The REF02RC/883C is tailored to power management applications, such as DC/DC converters and switching regulators. It is suitable for general-purpose voltage programming applications and three-terminal regulator systems. It offers significant advantages over other voltage references in terms of active and standby power consumption, automatic tracking of supply and output voltage, low temperature drift, and low output noise. It is an ideal voltage reference for line regulation, overvoltage protection, and loop compensation.

REF02RC/883C Working Principle

When the reference voltage of the REF02RC/883C is applied, the device produces a highly stable, externally adjustable output voltage, based on its internal bandgap reference voltage. This output voltage is resistant to line, load, and temperature fluctuations, and it does not drift with time. This device utilizes a two-stage current mirror circuit in combination with a cascade amplifier to form the reference. The 1st stage current mirror provides current to mirror the reference voltage. The amplifier linearizes the output, generating additional gain and providing tracking with temperature.

The REF02RC/883C utilizes a temperature-compensated voltage regulation circuit which includes an on-chip thermometer, a voltage reference diode, and an active temperature compensation. This system operates to compensate for temperature variations, resulting in a highly accurate reference voltage. It also includes on-chip ESD protection and a low-noise output stage.

Benefits

The REF02RC/883C provides several advantages over previous voltage references, such as lower power consumption, fast settling time, a wider input voltage range, better temperature stability, and improved accuracy. This makes it an ideal choice for modern power management applications, such as DC/DC converters, switching regulators, and three-terminal regulators. It also features an external voltage adjust pin, allowing for fine tuning of the output voltage. The on-chip ESD protection further improves the reliability and accuracy of this device.

Conclusion

The REF02RC/883C is a high-precision CMOS-based dual shunt bandgap reference that provides excellent temperature drift, supply rejection, and initial accuracy. With wide input voltage range and low output noise, it is suitable for a variety of power management applications, such as DC/DC converters and switching regulators. The high temperature tolerance and fast settling time makes it a reliable solution for various line regulation, overvoltage protection, and loop compensation.