Texas Instruments

LP2985IM5X-1.8

LP2985IM5X-1.8 Description

The LP2985IM5X-1.8 is a fixed-output linear voltage regulator designed by Texas Instruments, offering a regulated output voltage of 1.8V with a maximum output current of 150mA. This device is part of the Power Management Integrated Circuits (PMIC) category and is housed in a compact SOT23-5 package, making it suitable for surface-mount applications. Despite its small form factor, the LP2985IM5X-1.8 provides robust performance and a range of protection features, including over-current, over-temperature, and short-circuit protection.

LP2985IM5X-1.8 Features

• Fixed Output Voltage: The LP2985IM5X-1.8 maintains a stable output voltage of 1.8V, ensuring consistent power supply to connected devices.
• High Input Voltage Range: With a maximum input voltage of 16V, this regulator can accommodate a wide range of input sources, enhancing its versatility in various applications.
• Low Dropout Voltage: The maximum dropout voltage of 0.58V at 150mA ensures high efficiency, making it ideal for low-voltage applications where minimal power loss is crucial.
• Low Quiescent Current: The quiescent current of 95 µA minimizes power consumption, which is beneficial for battery-operated devices.
• High PSRR: The Power Supply Rejection Ratio (PSRR) of 45dB at 1kHz helps in filtering out noise from the input supply, ensuring a clean output voltage.
• Enable Control: The enable feature allows for dynamic control of the regulator's operation, providing flexibility in power management.
• Protection Features: Over-current, over-temperature, and short-circuit protection ensure reliable operation and protect the device from potential damage.
• Moisture Sensitivity Level: MSL 1 (Unlimited) indicates that the device is not sensitive to moisture, making it suitable for a wide range of environmental conditions.

LP2985IM5X-1.8 Applications

The LP2985IM5X-1.8 is well-suited for a variety of applications where a stable and efficient power supply is required. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and high PSRR make it ideal for portable electronics and battery-operated devices where power efficiency and noise reduction are critical.
• Consumer Electronics: The compact SOT23-5 package and robust protection features make it suitable for consumer electronics, ensuring reliable performance and protection against common power-related issues.
• Industrial Applications: The wide input voltage range and low dropout voltage make it suitable for industrial applications where input voltage fluctuations are common.
• Medical Devices: The enable control feature and protection mechanisms make it suitable for medical devices where precise power control and reliability are essential.

Conclusion of LP2985IM5X-1.8

The LP2985IM5X-1.8 is a versatile and efficient linear voltage regulator that offers a stable 1.8V output with a maximum current of 150mA. Its low dropout voltage, low quiescent current, and high PSRR make it an excellent choice for applications requiring high efficiency and low noise. The enable control and comprehensive protection features further enhance its reliability and flexibility. Despite being marked as obsolete, the LP2985IM5X-1.8 remains a reliable option for designers seeking a compact and efficient power management solution.