Texas Instruments

LP2985AIM5-4.0

LP2985AIM5-4.0 Description

The LP2985AIM5-4.0 is a fixed-output linear regulator designed by Texas Instruments, offering a robust and efficient solution for power management applications. This regulator is part of the Power Management Integrated Circuit (PMIC) category and is housed in a compact SOT23-5 package, making it suitable for space-constrained designs. The LP2985AIM5-4.0 provides a fixed output voltage of 4.0V and can deliver up to 150mA of output current, making it ideal for a variety of low-power applications. It features a maximum input voltage of 16V and a dropout voltage of 0.58V at 150mA, ensuring efficient operation even at low input-to-output differentials.

LP2985AIM5-4.0 Features

The LP2985AIM5-4.0 boasts several key features that enhance its performance and reliability:

• Fixed Output Voltage: The regulator provides a stable 4.0V output, ensuring consistent power delivery to connected devices.
• High Input Voltage Range: With a maximum input voltage of 16V, the LP2985AIM5-4.0 can operate across a wide range of input voltages, making it versatile for various power sources.
• Low Dropout Voltage: The maximum dropout voltage of 0.58V at 150mA ensures high efficiency, especially in applications where the input voltage is close to the output voltage.
• Low Quiescent Current: The regulator consumes only 95 µA of quiescent current, minimizing power loss and extending battery life in portable devices.
• High PSRR: The 45dB Power Supply Rejection Ratio at 1kHz helps in reducing noise and ripple, ensuring clean power delivery to sensitive circuits.
• Protection Features: The LP2985AIM5-4.0 includes over-current, over-temperature, and short-circuit protection, safeguarding the regulator and connected components from damage.
• Enable Control: The regulator features an enable pin, allowing for dynamic control of the output voltage, which can be useful in power sequencing and low-power standby modes.
• Surface Mount Packaging: The SOT23-5 package is ideal for surface mount applications, providing a small footprint and ease of integration into PCB designs.

LP2985AIM5-4.0 Applications

The LP2985AIM5-4.0 is well-suited for a variety of applications due to its combination of efficiency, reliability, and compact size:

• Portable Devices: Ideal for battery-powered devices such as smartphones, tablets, and wearables, where low power consumption and small form factor are critical.
• Embedded Systems: Suitable for microcontroller and microprocessor-based systems that require stable power supply and low noise.
• Industrial Equipment: Can be used in industrial control systems, sensors, and instrumentation where reliability and protection features are essential.
• Medical Devices: Applicable in medical equipment that demands low noise and high reliability, such as portable diagnostic devices and wearable health monitors.

Conclusion of LP2985AIM5-4.0

The LP2985AIM5-4.0 from Texas Instruments is a highly efficient and reliable linear regulator designed for applications requiring a fixed 4.0V output and up to 150mA of current. Its low dropout voltage, low quiescent current, and high PSRR make it an excellent choice for low-power and noise-sensitive applications. The inclusion of protection features and enable control further enhances its versatility and reliability. Despite being marked as obsolete, the LP2985AIM5-4.0 remains a valuable component for designers looking for a compact and efficient power management solution.