Texas Instruments

LP3985IM5-2.8  

Linear & Switching Voltage Regulators

LP3985IM5-2.8 Description

The LP3985IM5-2.8 is a fixed-output linear regulator from Texas Instruments, designed to provide a stable 2.8V output voltage with a maximum output current of 150mA. This regulator is part of the Power Management Integrated Circuit (PMIC) category and is housed in a compact SOT23-5 surface-mount package, making it suitable for a wide range of applications where space is a constraint. Despite its small form factor, the LP3985IM5-2.8 offers robust performance and reliability, with features such as low dropout voltage, low quiescent current, and comprehensive protection mechanisms.

LP3985IM5-2.8 Features

• Fixed Output Voltage: The LP3985IM5-2.8 provides a stable output voltage of 2.8V, ensuring consistent power supply to connected devices.
• Low Dropout Voltage: With a maximum dropout voltage of 0.1V at 150mA, this regulator can maintain its output voltage even when the input voltage is close to the output voltage, making it highly efficient.
• Low Quiescent Current: The regulator features a low quiescent current of 150µA, which is crucial for battery-powered applications where minimizing power consumption is essential.
• Enable Control Feature: The enable pin allows for easy control of the regulator's operation, enabling or disabling the output voltage as needed.
• Protection Features: The LP3985IM5-2.8 includes over-current, over-temperature, and short-circuit protection, ensuring reliable operation and safeguarding against potential faults.
• High Power Supply Rejection Ratio (PSRR): The regulator offers a PSRR of 50dB to 40dB across the frequency range of 1kHz to 10kHz, effectively filtering out noise from the input power supply.
• Moisture Sensitivity Level (MSL): The MSL rating of 1 (Unlimited) indicates that the device is not sensitive to moisture, making it suitable for various environmental conditions.
• Mounting Type: Surface mount technology (SMT) allows for easy integration into printed circuit boards (PCBs) and supports automated assembly processes.

LP3985IM5-2.8 Applications

The LP3985IM5-2.8 is ideal for a variety of applications that require a reliable and efficient power supply solution. Some specific use cases include:

• Battery-Powered Devices: The low quiescent current and low dropout voltage make this regulator suitable for portable devices such as smartphones, tablets, and wearable technology where battery life is critical.
• Consumer Electronics: In devices like digital cameras, MP3 players, and other consumer electronics, the LP3985IM5-2.8 can provide stable power with minimal power loss.
• Industrial Equipment: For applications in industrial settings, the robust protection features and high PSRR ensure reliable operation in harsh environments.
• Medical Devices: The compact size and high reliability of the LP3985IM5-2.8 make it suitable for medical devices where space and performance are both critical factors.

Conclusion of LP3985IM5-2.8

The LP3985IM5-2.8 from Texas Instruments is a high-performance linear regulator that offers a stable 2.8V 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 wide range of applications, particularly in battery-powered and space-constrained environments. Despite being marked as obsolete, the LP3985IM5-2.8 remains a reliable and efficient power management solution, offering significant advantages over similar models in terms of efficiency, reliability, and versatility.

LP3985IM5-2.8 Documents

Download datasheets and manufacturer documentation for LP3985IM5-2.8

Datasheets :

LP3985      

PCN Design/Specification :

Cu Wire Bond 14/May/2013