The R5426N116GA-TR is a voltage detector IC manufactured by Ricoh. This IC monitors voltage levels in electronic circuits and triggers a reset signal or other action if the voltage falls below a specified threshold. It's crucial for ensuring the stability and reliability of electronic devices by preventing malfunctions caused by voltage drops.

Applications

• Microcontroller Systems: Used to monitor power supply and reset the microcontroller when voltage drops, preventing data corruption and crashes.
• Battery-Powered Devices: Prevents deep discharge by monitoring battery voltage, thereby extending battery lifespan.
• Power Management Circuits: Implements undervoltage lockout (UVLO) to protect sensitive components from low-voltage operation.
• Real-Time Clocks (RTC): Ensures the RTC maintains operation, even during short power interruptions.
• Memory Protection: Initiates data backup processes to protect volatile memory when voltage drops are detected.

Features

• Low Current Consumption: Minimizes power usage, which makes it suitable for battery-powered applications.
• High Accuracy Detection Voltage: Ensures accurate voltage monitoring with a high degree of precision.
• Integrated Hysteresis: Prevents unstable switching or chattering around the threshold voltage.
• Compact Package: Allows for easy integration into small and compact electronic devices.
• Open-Drain Output: Provides flexibility when interfacing with different logic circuits.

Benefits

• Improved System Reliability: Prevents malfunctions and data corruption that can result from voltage drops.
• Extended Battery Life: Low power consumption assists in prolonging the operating time of battery-powered devices.
• Simplified Circuit Design: Integrated functions reduce the demand for external components, which streamlines designs.
• Enhanced System Protection: Safeguards sensitive components from damage triggered by undervoltage conditions.
• Cost-Effective Solution: Provides a reliable and affordable approach to voltage monitoring needs.

Additional Details

The R5426N116GA-TR operates within defined voltage and temperature ranges, according to Ricoh's datasheet. Typically supplied in a small SOT-23 package for simple PCB integration. Its output is an open-drain N-channel MOSFET, which requires a pull-up resistor connected to a voltage source. The detection voltage is preset, for example, at 1.16V, with a specific tolerance. Hysteresis, usually a few millivolts, helps prevent unstable switching. The supply current is extremely low, typically in the microampere range, making it highly energy-efficient. This voltage detector is essential in applications demanding stable voltage operation, such as portable devices and industrial control systems.