MCP103T-450E/LB

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Power Management Integrated Circuits (PMICs) are essential components that manage an electronic system\'s power. PMICs include a wide range of components such as linear and switching regulators, LED drivers, battery chargers, and supervisors. One such supervisor is the MCP103T-450E/LB, an ultra-low power microprocessor reset supervisor designed for microprocessor-based systems. It is designed to monitor the Vcc supply for an MCU and pull reset low if the Vcc drops below its trip point.

The MCP103T-450E/LB is ideal for modern ultra-low power and low voltage microcontrollers that demand accurate reset detection and lowest power consumption. It is offered in a tiny SOT-23 package and requires fewer passive external components than comparable products, lowering the overall system cost.

Application Fields

The MCP103T-450E/LB is designed to monitor the system Vcc for any indication that it is not functioning within specification. It is suitable for applications such as metering, security, and portable devices where a low-power, low-cost reset detection solution is needed. It is also ideal for medical, automotive and industrial applications where signal integrity and accuracy are required.

The reset supervisor’s low power guarantee, meager package size, and wide detection range up to 6V makes it an ideal choice for all kinds of microprocessor-based systems. It is also a reliable solution for low voltage and ultra-low power applications such as wearable and IoT applications.

Working Principle

The MCP103T-450E/LB is a microprocessor reset supervisor that monitors the voltage on the Vcc pin of a microcontroller and pulls reset low if the Vcc drops below its specified trip point. It uses an internal voltage reference and voltage comparator to determine if the Vcc is within its specified operating range. If the voltage drops below the reference voltage, the reset signal is pulled low and the microcontroller will be reset.

The reset supervisor has an integrated watchdog timer that can be used to reset the microcontroller in the event of a software error. The watchdog timer is enabled by setting the WDE bit to a logical 1. If the microcontroller does not clear the bit within the watchdog time-out period, it will be reset. This feature helps to ensure that the microcontroller will remain functional in the event of a software fault.

The reset supervisor also has an adjustable reset timeout feature. The reset timeout is used to maintain the reset signal for a set amount of time after the reset condition has cleared in order to ensure that the microcontroller is given sufficient time to boot properly. The reset timeout can be configured through an external capacitor connected to the CT pin.

The MCP103T-450E/LB is a precision reset supervisor with a low power consumption ideal for modern ultra-low power microcontrollers. It offers a wide operating range that can be adapted to different powers supply needs, and is mostly suited for metering, security, and portable device applications. It provides a low-power and cost-effective solution for resetting microcontrollers, with an integrated watchdog timer and adjustable reset timeout.

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