ZRC400A03STOB

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PMIC (Power Management IC) is a very important element in the development of electronic systems. voltage references play a critical role in the proper and stable performance of PMIC\'s. The ZRC400A03STOB is a high-performance, reliable Voltage Reference IC designed by Zetex Semiconductors. This IC is used in mobile devices and other power management applications due to its excellent performance and cost-effectiveness.

The ZRC400A03STOB is a precision Voltage Reference IC with an integrated internal bandgap reference diode. It has an input voltage range from 0.8V to 2.2V, with an output voltage accuracy of 0.3 mV (at 25°C). It has a wake-up from reset functionality, has an operating temperature range from -40°C to +130°C, and a maximum junction temperature of +125°C.

The unique feature of this IC is the fuse programming option, which increases the accuracy of the output voltage by 0.1 mV (at 25°C) by using an external programming resistor. This feature also improves the accuracy of the input voltage range by up to 0.5mV (at 25°C).

The ZRC400A03STOB is easy to use and is designed to provide a precise and highly stable reference voltage over a wide range of input voltages, temperatures and output current loads. The IC has a high accuracy voltage reference range of 0.5mV (at25°C) with a very low total output error. It also has a high temperature coefficient of 0.2mV/K/V (at 25°C) and an excellent power supply rejection ratio of 95 dB (at 25°C).

The ZRC400A03STOB has a high level of ESD protection, with an HBM rating up to 7kV. The IC is also designed with EMI mitigating features to reduce radio frequency interference in applications such as smart phone displays and tablets.

The ZRC400A03STOB application field extends to power supply designers, battery management, automotive, industrial applications and consumer electronics. In power supplies, the IC is used to provide precise and highly stable output reference voltages during load transients, temperature changes and AC mains voltage line variations. In consumer electronics, such as mobile devices, the IC is used to maintain precise voltage levels in audio, video and display functions. In automotive applications, the IC is used to monitor and measure external motion controlled actuators.

The working principle of the ZRC400A03STOB as Voltage Reference IC is based on the bandgap proportional voltage divider principle. This principle is based on the reference junction and resistor divider action, which uses an NTC thermistor in the voltage divider circuit, providing the exact reference voltage output. The device uses a bandgap reference, a reference resistor and an NTC thermistor in the voltage divider circuit to achieve precise voltage reference output. The thermistor is used to sense the input voltage and maintain the output voltage constant, even with temperature variations. The reference junction temperature is regulated using a thermal element to achieve better accuracy.

The IC also contains a wide range of safety features such as a foldback current-limiting and over-voltage protection circuit, which ensures that the output voltage would never exceed the supply voltage and prevents device overheating. The IC also has an integrated power-on reset circuit, which provides a low-cost latch-up protection and is activated by any voltage drop in the supply voltage.

In short, the ZRC400A03STOB Voltage Reference IC is a reliable, cost-effective and accurate voltage reference IC with great advantages for power management applications in a wide range of industries. It is easy to use, has a very high precision output and temperature coefficient and provides excellent power supply rejection for applications such as smart phone displays and tablets.

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