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BD3989FV-E2

BD3989FV-E2 Description

The BD3989FV-E2 is a dual linear voltage regulator designed by ROHM Semiconductor, offering adjustable positive and negative output voltages. This device is housed in an 8SSOPB package and is suitable for surface mount applications. Despite being marked as obsolete, it remains a reliable choice for specific applications requiring dual regulation with low dropout voltage and high power supply rejection ratio (PSRR).

BD3989FV-E2 Features

• Output Type: The BD3989FV-E2 provides adjustable output voltages, allowing for flexibility in power supply design.
• Current Capability: It supports output currents of 25mA and 50mA, making it suitable for a range of low to medium current applications.
• Dual Regulators: Equipped with two regulators, this IC can manage both positive and negative output configurations, simplifying circuit design.
• Low Dropout Voltage: With a maximum dropout voltage of 0.35V at 25mA and 0.45V at 50mA, it maintains efficiency even under low input-to-output voltage differentials.
• Low Quiescent Current: The quiescent current is a mere 0.5 mA, ensuring minimal power consumption during operation.
• High PSRR: A PSRR of 50dB at 120Hz ensures excellent noise rejection, contributing to stable output voltage.
• Protection Features: Overcurrent and overtemperature protection safeguard the device and connected circuits from damage.
• Compliance: The BD3989FV-E2 is REACH unaffected and RoHS3 compliant, meeting environmental and regulatory standards.
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates that the device is not sensitive to moisture, enhancing its reliability in various environments.
• Packaging: Available in tape and reel (TR) packaging, facilitating efficient handling and assembly in manufacturing processes.

BD3989FV-E2 Applications

The BD3989FV-E2 is ideal for applications requiring dual voltage regulation with adjustable outputs. Its low dropout voltage and high PSRR make it suitable for precision analog circuits, such as:

• Medical Devices: Where stable and low-noise power supplies are critical for accurate measurements.
• Industrial Control Systems: For managing power in systems with varying input voltages and requiring both positive and negative supply rails.
• Telecommunications Equipment: To provide clean power to sensitive RF and baseband circuits.
• Audio Amplifiers: Ensuring high fidelity by minimizing noise and maintaining stable power supply voltages.

Conclusion of BD3989FV-E2

The BD3989FV-E2, despite its obsolete status, remains a valuable component for applications requiring dual linear voltage regulation. Its adjustable output voltages, low dropout, and high PSRR make it a robust choice for precision power supply needs. The inclusion of overcurrent and overtemperature protection further enhances its reliability. While newer alternatives may exist, the BD3989FV-E2 continues to offer a reliable and efficient solution for specific use cases, particularly in industries where precision and stability are paramount.