Texas Instruments

LP2985AIM5-4.5

LP2985AIM5-4.5 Description

The LP2985AIM5-4.5 is a fixed output linear voltage regulator designed by Texas Instruments, featuring a 4.5V output voltage and a maximum output current of 150mA. This regulator is housed in a compact SOT23-5 package, making it suitable for surface mount applications. Despite being marked as obsolete, the LP2985AIM5-4.5 remains a reliable choice for various electronic circuits due to its robust performance and comprehensive protection features.

LP2985AIM5-4.5 Features

• Fixed Output Voltage: The LP2985AIM5-4.5 provides a stable 4.5V output, ensuring consistent power supply to connected devices.
• High Input Voltage Range: With a maximum input voltage of 16V, this regulator can operate across a wide range of input conditions, making it versatile for different power sources.
• Low Dropout Voltage: A maximum dropout voltage of 0.58V at 150mA ensures efficient operation even when the input voltage is close to the output voltage, minimizing power loss.
• Low Quiescent Current: The regulator consumes only 95 µA of quiescent current, making it energy-efficient and suitable for battery-powered applications.
• Enable Control Feature: The enable pin allows for dynamic control of the regulator's operation, enabling power-saving modes and precise control over the power supply.
• Protection Features: Overcurrent, overtemperature, and short-circuit protections ensure the regulator's longevity and reliability under various operating conditions.
• High Power Supply Rejection Ratio (PSRR): A PSRR of 45dB at 1kHz helps in filtering out noise from the input power supply, resulting in a cleaner output voltage.
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates that the component is not sensitive to moisture, making it suitable for a wide range of environmental conditions.

LP2985AIM5-4.5 Applications

The LP2985AIM5-4.5 is ideal for applications requiring a stable and efficient power supply with a fixed output voltage. Specific use cases include:

• Portable Devices: Due to its low quiescent current and compact size, it is well-suited for battery-operated devices such as handheld electronics, where power efficiency and space-saving are critical.
• Embedded Systems: The regulator's ability to handle a wide input voltage range and provide a stable output makes it suitable for embedded systems in various industries, including automotive, industrial controls, and telecommunications.
• Power Management: The enable feature and comprehensive protection mechanisms make it an excellent choice for power management applications where precise control and reliability are essential.
• Low Dropout Applications: The low dropout voltage ensures efficient operation in applications where the input voltage may vary close to the output voltage, such as in automotive electronics or battery backup systems.

Conclusion of LP2985AIM5-4.5

The LP2985AIM5-4.5 is a robust and versatile linear voltage regulator that offers a stable 4.5V output with a maximum current of 150mA. Its low dropout voltage, low quiescent current, and comprehensive protection features make it an ideal choice for a variety of applications, particularly in portable and embedded systems. Despite its obsolete status, the LP2985AIM5-4.5 remains a reliable option for designers seeking a compact, efficient, and feature-rich regulator.