The MIC803-29D4VM3 is a voltage supervisory circuit manufactured by Micrel (now Microchip Technology). This device is designed to monitor the supply voltage of a system and provide a reset signal when the voltage falls below a specified threshold. This ensures that the system starts up in a known state and prevents erroneous operation during brownout conditions.

Applications

• Microprocessor Systems: Monitors the supply voltage of microprocessors and resets them during undervoltage conditions.
• Microcontroller Systems: Provides reset signals for microcontrollers to prevent code corruption.
• Embedded Systems: Ensures reliable operation in embedded applications by monitoring the power supply.
• Industrial Control Systems: Protects sensitive equipment from voltage fluctuations.
• Automotive Applications: Monitors the battery voltage and resets critical systems during low voltage.

Features

• Precision Voltage Monitoring: Accurately detects undervoltage conditions.
• Active-Low Reset Output: Provides a reset signal when the voltage falls below the threshold.
• Open-Drain Output: Allows for flexible connection to various microcontrollers.
• Small Package Size: Minimizes board space requirements.
• Low Supply Current: Conserves power in battery-powered applications.

Benefits

• Improved System Reliability: Prevents erroneous operation during undervoltage conditions.
• Protection Against Data Corruption: Resets the system before data corruption can occur.
• Simplified Reset Circuitry: Requires minimal external components.
• Extended Battery Life: Low supply current minimizes power consumption.
• Robust Performance: Operates reliably over a wide temperature range.

Additional Details

The MIC803-29D4VM3 is typically available in small SOT packages. The reset threshold voltage is internally set. Key parameters include the reset threshold voltage, reset timeout period, and supply voltage range. An external pull-up resistor is required for the open-drain reset output. Refer to the datasheet for specific values, application circuit examples, and PCB layout recommendations. Proper decoupling capacitors should be used to ensure stable operation. The device is RoHS compliant.