The Rohm Semiconductor BD4269FJ-CE2 is a low-dropout (LDO) linear regulator designed to provide a stable and clean power supply for a variety of applications. Featuring low quiescent current and high ripple rejection, this regulator is ideal for noise-sensitive circuits and battery-powered devices. Its integrated protection features ensure robust and reliable operation.

Applications

• Microcontroller Power: Supplies stable power to microcontrollers in embedded systems.
• Sensor Power: Provides clean power to sensors, ensuring accurate readings.
• Wireless Communication Devices: Used in smartphones, tablets, and other wireless devices to regulate power for RF and baseband circuits.
• Portable Audio Players: Ensures stable and clean power for audio amplifiers and DACs.
• Automotive Electronics: Powers various electronic components in automotive systems.

Features

• Low Dropout Voltage: Maintains regulation with a small difference between input and output voltage.
• Low Quiescent Current: Minimizes power consumption in standby mode, extending battery life.
• High Ripple Rejection: Filters out noise and ripple from the input voltage, providing a clean output.
• Overcurrent Protection: Protects the regulator and the load from damage due to excessive current.
• Thermal Shutdown: Shuts down the regulator when the junction temperature exceeds a safe limit.

Benefits

• Stable Power Supply: Provides a consistent and reliable voltage supply, improving system performance.
• Extended Battery Life: Low quiescent current reduces power consumption, increasing battery runtime.
• Improved Signal Integrity: High ripple rejection ensures a clean power supply, reducing noise in sensitive circuits.
• Robust Protection: Overcurrent and thermal shutdown features protect against damage and enhance reliability.
• Easy Integration: Simple design and minimal external components required for easy implementation.

Additional Details

The BD4269FJ-CE2 provides a fixed output voltage of 2.9V with high accuracy. It supports an input voltage range of 2.7V to 5.5V. The device is available in a compact SOT-89 package, suitable for space-constrained applications. The regulator's low ESR (Equivalent Series Resistance) output capacitor compatibility ensures stability and performance with a wide range of capacitor types. It operates over a temperature range of -40°C to +85°C, making it suitable for various environmental conditions. The device is also RoHS compliant, adhering to environmental regulations.