ADR431BRZ

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The ADR431BRZ is a family of micropower voltage references within the wide portfolio of analog integrated circuits from Analog Devices. It belongs to the switch-mode reference family, designed to replace linear voltage references in power management applications. With precision, low noise, low power, and small package size, the ADR431BRZ is an ideal choice for power management applications.

The ADR431BRZ is a low voltage, micropower voltage reference with precision and stability. Its anodic voltage is factory-adjusted to a 2.5V typical value and its initial line and load regulation results make it a great choice for power management applications. Featuring low quiescent current consumption and wide ripple range, ADR431BRZ ensures its low output noise, making it suitable for a variety of digital and analogue applications.

Application Field

The main application area of ADR431BRZ is power management integrated circuits used in both portable and non-portable systems. As controllers with micropower voltage references become more compact, they are increasingly being used in portable applications, such as mobile phones, digital cameras and gaming devices. As the mobile computing market continues to grow, the ADR431BRZ provides the solutions for these power management requirements in portable systems.

Furthermore, the ADR431BRZ is also used in non-portable systems such as HDTVs, PCs, industrial systems, instrumentation and medical systems for reference voltage stabilization and noise reduction. It is also suitable for use in the automotive market, specifically automotive electronics applications such as clocks and entertainment systems.

Working Principle

At the heart of this reference family is a low-noise, high-speed and high-precision error amplifier and an innovative control logic. The ADR431BRZ uses an advanced switch-mode PWM architecture to regulate anodic voltage to its precise value and thereby maintain stringent precision over the entire temperature and voltage range. The PWM architecture also helps eliminate output transients and improve the reference\'s dynamic stability.

Additionally, the ADR431BRZ operates in the fractional micropower range – it only consumes 200μA of quiescent current and is able to run in a wide voltage range from 1.8V to 5.5V. As such, it is suited for a variety of power budget needs. Moreover, it is designed to work with low ESR ceramic capacitors for maximum transient performance and instantaneous power supply rejection ratio. Its precise initial tolerance, low temperature coefficient and fast response time make it ideal for precise voltage regulation.

Conclusion

Analog Devices’ ADR431BRZ is a family of micropower voltage references that are primarily used in power management integrated circuits for portable and non-portable systems. Its anodic voltage is factory-adjusted to a 2.5V typical value and its initial line and load regulation results make it a great choice for power management applications. Featuring low quiescent current consumption and wide ripple range, the ADR431BRZ ensures its low output noise, making it suitable for a variety of digital and analogue applications. Additionally, it operates in the fractional micropower range and is able to run in a wide voltage range from 1.8V to 5.5V, making it suited for a variety of power budget needs. As such, it is an ideal choice for power management applications.

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