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PMIC - Voltage Reference

ZR40401N850TA is a high-accuracy, low-power voltage reference IC with a temperature coefficient of only 8ppm/°C. This IC is ideal for a wide range of applications, including power supplies, high-power converters, medical implants, and medical diagnostic systems, but can also be used in more general applications as a voltage reference.

Application Field

The ZR40401N850TA is often used in power supply designs where accurate reference voltages are required. In a power supply, this reference can be used to control the output voltage and ensure reliability and stability. The ZR40401N850TA can also be used in high-power converters for large current levels or for interleaved parallel topologies. Because of its low temperature coefficient performance, it can be used in applications where long-term drift and stability are important, such as medical implants and medical diagnostic systems. It can also be used in general purpose stability applications, such as database clock circuits or projectors.

Working Principle

The ZR40401N850TA works by using a highly accurate band-gap reference voltage to provide a stable output voltage regardless of power supply and temperature variations. The band-gap reference voltage is generated by a bias current reference circuit and is then compared to an external reference voltage. If the external reference voltage is higher than the band-gap voltage, then the current in the output stage increases and pushes the output voltage down. Conversely, if the external reference voltage is lower than the band-gap voltage, then the current in the output stage decreases and pulls the output voltage up.

The ZR40401N850TA also uses a precision resistor network to adjust the output voltage level. This network is used to sense the output voltage and compare it to the external reference voltage. If the output voltage is lower than the reference voltage, then the resistor network increases resistance and pulls the output voltage level up. Conversely, if the output voltage is higher than the reference voltage, then the resistor network decreases resistance and pushes the output voltage level down.

The ZR40401N850TA also includes several built-in safety features to protect the device from over-temperature and over-current conditions. These features help to ensure that the device is able to operate reliably in a wide range of conditions.

Conclusion

The ZR40401N850TA is a low-power and high-accuracy voltage reference IC that is suitable for a wide range of applications. It can be used in power supplies, high-power converters, medical implants, and medical diagnostic systems, as well as general purpose stability applications. The device works by using a highly accurate band-gap reference voltage and a precision resistor network to adjust the output voltage to a precise level. The device also includes several built-in safety features to help ensure reliable operation.

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