MIC2774N-17YM5-TR

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Power management integrated circuits (PMICs) are utilized in a massive range of hardware-dependent applications and play an essential role in ensuring sufficient energy supply to critical systems. With its versatile design capabilities and user applications, the MIC2774N-17YM5-TR series of PMICs are the preferred choice for supervisory functions. This article will outline the application field and working principle of the MIC2774N-17YM5-TR.

Application Field

The MIC2774N-17YM5-TR is a low-power supervising PMIC IC that is ideal for use in microprocessor-based systems. Its features include an on-chip voltage detector and comparator that can provide an input voltage range of 2.4V to 5.5V. Its highly efficient low-power design makes it suitable for applications where low quiescent current is preferred. This series of PMICs is mainly used in portable electronic devices. Its compact size, low power consumption, broad temperature operating range and IEC/ESD qualification make it an ideal choice for designs that require a low-power and space-saving solution. Furthermore, the voltage detector can take input power supplies with dynamic fluctuations. This makes the MIC2774N-17YM5-TR series suitable for use in applications that demand robustness and high reliability.

Working Principle

The MIC2774N-17YM5-TR is a voltage monitoring device that continuously monitors a single power supply and generates a reset signal when that supply drops below a preset voltage threshold level. The device features three operating modes: fixed-threshold mode, factory-programmed-threshold mode and user-programmable-threshold mode. The fixed-threshold mode is triggered when the input voltage drops below a specified voltage, typically 2.4V for this series of PMIC. This mode is used when a precise voltage level needs to be monitored without any software programming. The factory-programmed-threshold mode is used when a predetermined voltage level needs to be monitored but is not known beforehand. In this mode, the threshold level is set using a customer-specified resistor value. The user-programmable-threshold mode is used when the threshold level needs to be easily adjustable by the user. This mode uses a customer-specified reprogrammable register to adjust the threshold level.

Once the voltage of the supplied power reaches below the set threshold, the MIC2774N-17YM5-TR will generate a reset signal, typically a negative-going reset, which will reset the system to its initial state. This reset signal can be used to wake up the device, to reset the system or to alert the system to an abnormal power situation. The reset signal can be configured to be active-low, active-high or active-both. Moreover, the reset signal is programmable so that the duration of this reset signal can be adjusted to meet specific requirements. Furthermore, the MIC2774N-17YM5-TR has a watchdog timer which allows it to detect system lockup and reset the system, thus ensuring reliable operation.

Conclusion

The MIC2774N-17YM5-TR is a low-power voltage monitoring PMIC IC which is typically used in portable electronics. Its versatile design makes it suitable for use in a range of applications where efficiency, reliability and space-saving solution is essential. Its on-chip voltage detector and comparator provide an input voltage range of 2.4V to 5.5V, and once the supplied voltage reaches below a set threshold level, a reset signal is generated which can be used to reset the system or alert it to an abnormal condition. Furthermore, the reset signal from the PMIC is programmable so that the duration of the reset signal can be adjusted to meet specific requirements. The MIC2774N-17YM5-TR is a reliable and efficient choice for voltage monitoring applications.

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