Texas Instruments

LP38853MRX-ADJ

LP38853MRX-ADJ Description

The LP38853MRX-ADJ is a linear positive adjustable voltage regulator designed by Texas Instruments, offering a robust solution for power management applications. This regulator is part of the Power Management Integrated Circuit (PMIC) category and is housed in an 8SO PWRPAD package, suitable for surface mount applications. Despite being marked as obsolete, the LP38853MRX-ADJ remains a reliable choice for specific power management needs.

LP38853MRX-ADJ Features

• Adjustable Output Voltage: The LP38853MRX-ADJ provides an adjustable output voltage range from 0.8V to 1.8V, making it highly versatile for a variety of applications that require precise voltage control.
• High Current Capability: With a maximum output current of 3A, this regulator can handle high-load requirements, ensuring stable power delivery to demanding circuits.
• Low Dropout Voltage: A maximum dropout voltage of 0.45V at 3A ensures high efficiency, even under heavy load conditions, making it ideal for applications where input voltage is close to the desired output voltage.
• Low Quiescent Current: The regulator operates with a low quiescent current of 300 µA, minimizing power consumption during standby or low-load conditions.
• Enhanced Protection Features: The LP38853MRX-ADJ includes comprehensive protection features such as over current, over temperature, short circuit, and under voltage lockout (UVLO), ensuring reliable operation and protection against various fault conditions.
• Control Features: The regulator offers enable and soft start functionalities, allowing for precise control over the power-up sequence and ensuring a smooth transition to the desired operating state.
• High PSRR: The regulator boasts a high power supply rejection ratio (PSRR) of 80dB to 70dB across the frequency range of 120Hz to 1kHz, effectively filtering out noise and ripple from the input supply.
• Moisture Sensitivity Level: With an MSL rating of 3 (168 hours), the LP38853MRX-ADJ is suitable for applications requiring moderate moisture resistance, ensuring reliability in various environmental conditions.

LP38853MRX-ADJ Applications

The LP38853MRX-ADJ is well-suited for a range of applications where precise voltage regulation and high current delivery are critical. Some specific use cases include:

• Consumer Electronics: Ideal for powering high-current components in devices such as smartphones, tablets, and laptops, where low dropout voltage and high efficiency are essential.
• Industrial Equipment: Suitable for industrial control systems and automation equipment that require stable power supply and robust protection features.
• Telecommunications: Can be used in base stations and communication equipment where reliable power management and low noise are crucial for maintaining signal integrity.
• Automotive Electronics: Applicable in automotive systems where high current and precise voltage control are necessary for powering critical components such as ECUs and infotainment systems.

Conclusion of LP38853MRX-ADJ

The LP38853MRX-ADJ, despite being marked as obsolete, remains a valuable component in the Texas Instruments portfolio for power management applications. Its adjustable output voltage, high current capability, low dropout voltage, and comprehensive protection features make it a reliable choice for a variety of demanding applications. The regulator's low quiescent current and high PSRR further enhance its performance, ensuring efficient and noise-free power delivery. While newer alternatives may be available, the LP38853MRX-ADJ continues to offer unique advantages and remains a suitable option for specific power management needs.