MIC803-41D4VM3-TR

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Introduction

The MIC803-41D4VM3-TR is a versatile PMIC/supervisor device. It is designed as a comprehensive power monitoring and control combo, greatly simplifying system supervisions and fault detections. This IC supports manual and automatic reset functions, as well as input threshold detection, over-current protection, manual reset, and an adjustable window watchdog timer.

Application Field

The MIC803-41D4VM3-TR is widely used in power computing applications due to its low-power consumption, low-voltage operation and multiple control functions. It is suitable for microprocessors, microcontrollers, digital signal processors and single-chip system, as well as other applications that require high reliability and low consumption at the system level. This IC is often used in critical power-related applications in terms of system reliability, including smart phones, tablets, medical systems, and industrial control systems.

Working Principle

The MIC803-41D4VM3-TR\'s main function is to monitor and supervise the power supply, providing protection from dangerous voltage excursions, powe-architecture-related challenges and voltage regulation problems. It can detect input current and temperature levels, perform ON/OFF control to system power, as well as trigger and filter an external reset ID. Additionally, it also supports power failure detection, power-on reset and brownout protection.

The device is comprised of different control functions that operate together in order to protect the system from power malfunctions or abrupt voltage changes. The Power-On Reset (POR) circuit monitor the voltage across the VCC pin, while the brownout detection circuit monitors the voltage across the VBATT pin. If either the VCC or VBATT input voltage drops below a specified threshold, the POR/BOD circuit will assert an output signal, the VLPR signal, to the other control functions.

The power-fail management of MIC803-41D4VM3-TR device include power fail signal input, Power Off reset and WDT watchdog. There are two separate functions for power-fail signal inputs in MIC803-41D4VM3-TR device. The first one is the Power Off Reset (POR) signal, which is the power fail input for the reset system. If the POR signal is asserted, the device will immediately shutdown and both the VCC and the VBATT will be internally switched off. The second one is the watchdog timer. This will monitor the POR/BOD status, and if the POR or BOD signal is asserted, the WDT will reset the system after a specified period of time.

Finally, a power-fail detection circuit monitors the VDD and VBATT input pins. This circuit will generate a power-fail reset if the VDD or VBATT voltage drops below a specified threshold. The power-fail reset will then activate a manual reset signal to shut down the system.

Conclusion

The MIC803-41D4VM3-TR is an effective PMIC/supervisor device for maintaining microprocessor, microcontrollers and overall system reliability. It includes various power monitoring and control functions, such as manual and automatic reset, over-current protection, input threshold detection and window watchdog timer. These tools protect the system from voltage excursions, malfunctions, and other power-related issues. Therefore, the MIC803-41D4VM3-TR is an excellent choice for critical power-related applications.

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