ATL431AQDBZR Integrated Circuits (ICs)

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A voltage reference, also known as a reference voltage, is a type of precision regulator, which produces a set output voltage regardless of input voltage, temperature, or load current. The voltage reference is an important component in a selection of power management integrated circuits (PMICs), such as the ATL431AQDBZR. This reference device provides excellent accuracy and long-term stability, catering for a range of technology-driven applications. In this article, we’ll look in detail at the application field and working principle of the ATL431AQDBZR.

At only 2.7 mm x 2.0 mm and 0.66 mm high, the ATL431AQDBZR provides an ideal solution for compact and space-limited applications, such as IoT and personal health monitoring devices. It is a high-voltage precision bandgap shunt regulator that operates from 1.4V up to 20V. This makes it well-suited for use in a wide range of low-voltage applications, such as those powered by lithium-ion (Li+) batteries, super-capacitors, steppers, and LEDs. The ATL431AQDBZR is also highly reliable, offering a low maximum drift of 20 ppm/°C.

The precise output voltage of the ATL431AQDBZR is determined by a circuit element known as a bandgap reference. This works by using two transistors with different temperature coefficients connected in a ‘diode’ formation. When the two transistors’ voltage drops are differently impacted by changes in temperature, the difference between them is used to create a precise voltage. This voltage is then compared with a reference voltage created by a resistor divider network. The precise voltage is then corrected to match the target voltage of 2.5V in the ATL431AQDBZR.

The ATL431AQDBZR uses an integrated loop compensation network, allowing for a quick start-up with high stability, even with a very small output capacitance. The load and line regulation characteristics are also outstanding, with a maximum load regulation of 0.008% and a maximum line regulation of 0.015%. Similarly, the device has an excellent power supply ripple rejection of 65 dB, providing enhanced immunity against high-frequency noise spurs in power lines.

In addition to its excellent regulation characteristics and highly reliable operation, the ATL431AQDBZR also has a range of protection functions. It includes advanced over-voltage protection, under-voltage protection, over-current protection for both linear and switching power supplies, thermal shutdown, and Brownout protection. This makes it ideal for a range of applications from personal electronics to advanced industrial systems.

The ATL431AQDBZR also features integrated soft-start and slew-rate limit functions, which ensure a fast start-up and soft output voltage rise rate. This feature ensures that switching transients on the power supply are minimized, helping to reduce input line current inrush, as well as the power dissipation of the device.

Overall, the ATL431AQDBZR is a versatile, robust and highly reliable voltage reference device, designed to provide accurate and stable voltage control in a range of applications.Thanks to its ultra-small form factor, exceptional precision and a range of integrated safety features, the ATL431AQDBLZR is an ideal choice for low-voltage applications requiring accurate and reliable voltage references.

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