The BD5228FVE is a voltage detector IC manufactured by Rohm Semiconductor, falling under the category of PMIC (Power Management Integrated Circuit) supervisors. It is designed to monitor the input voltage of electronic circuits and generate a reset signal when the voltage drops below a predefined threshold. This is crucial for preventing malfunctions and data corruption in microcontrollers and other digital circuits caused by voltage sags or brownout conditions, ensuring system stability and reliable operation.

Applications

• Microcontroller Systems: Ensures a proper reset of the microcontroller during power-up, power-down, and voltage drops, preventing program errors.
• Memory Protection: Safeguards data stored in volatile memory (RAM) by initiating a reset if the voltage falls below the minimum operating level.
• Portable Electronics: Monitors battery voltage in devices like smartphones, tablets, and wearable devices, preventing malfunctions due to low-battery conditions.
• Industrial Control Systems: Provides voltage monitoring for critical control systems, ensuring reliable operation in industrial environments.
• Automotive Electronics: Monitors voltage levels in automotive ECUs (Engine Control Units) and other electronic systems to ensure safe and reliable operation.

Features

• High-Accuracy Voltage Detection: Offers precise voltage monitoring with a typical accuracy of ±1%.
• Low Current Consumption: Minimizes power usage, making it suitable for battery-powered applications.
• Open Drain Output: Provides flexibility in interfacing with various microcontroller and logic systems.
• Small Package Size: Available in a compact package, saving valuable board space.
• Hysteresis: Includes hysteresis to prevent oscillations or chattering of the reset signal during voltage fluctuations.

Benefits

• Improved System Stability: Prevents malfunctions and ensures reliable operation of electronic systems.
• Data Protection: Prevents data corruption in memory devices during voltage drops.
• Extended Battery Life: Low power consumption contributes to longer battery life in portable devices.
• Simplified Design: Integrates voltage monitoring and reset functionality into a single chip, simplifying circuit design.
• Enhanced Reliability: Provides reliable voltage monitoring in a wide range of operating conditions.

Additional Details

The BD5228FVE typically operates with a supply voltage range of 1.6V to 5.5V. The reset threshold voltage is factory-set and available in different voltage levels to suit specific application requirements. The operating temperature range is generally between -40°C and +85°C. The output is an open-drain type, requiring a pull-up resistor. The hysteresis characteristic helps prevent false triggering of the reset signal due to noise or minor voltage fluctuations.