STMicroelectronics

LD3985J25R

LD3985J25R Description

The LD3985J25R is a linear voltage regulator designed by STMicroelectronics, a leading global semiconductor manufacturer. This regulator is part of the Power Management Integrated Circuit (PMIC) category and is specifically tailored for applications requiring a fixed output voltage of 2.5V and a maximum output current of 150mA. The device is housed in a 5-flip chip package, which is ideal for surface mount applications, ensuring compactness and reliability in various electronic systems.

LD3985J25R Features

• Output Type: Fixed, providing a stable 2.5V output voltage.
• Input Voltage Range: Capable of handling a maximum input voltage of 6V, ensuring compatibility with a wide range of power sources.
• Output Current: Delivers a consistent 150mA output current, suitable for low-power applications.
• Low Dropout Voltage: A maximum dropout voltage of 0.1V at 150mA ensures high efficiency, even at low input-to-output voltage differences.
• Low Quiescent Current: Consumes only 150µA in quiescent state, minimizing power loss and extending battery life in portable devices.
• Control Features: Includes an enable function, allowing for dynamic control and power savings.
• Protection Features: Equipped with over-current and over-temperature protection, ensuring robustness and reliability in various operating conditions.
• PSRR: Offers a high power supply rejection ratio of 60dB to 50dB across a frequency range of 1kHz to 10kHz, ensuring minimal noise and ripple on the output voltage.
• Compliance and Packaging: The LD3985J25R is REACH unaffected and RoHS3 compliant, making it suitable for environmentally conscious designs. It is available in a tape and reel (TR) package, facilitating automated assembly processes.

LD3985J25R Applications

The LD3985J25R is ideal for a variety of applications where a stable, low-power supply is required. Some specific use cases include:

• Portable Electronics: Ideal for battery-powered devices such as smartphones, tablets, and wearables, where low quiescent current and high efficiency are crucial.
• IoT Devices: Suitable for Internet of Things (IoT) devices that require a compact, reliable power solution with minimal power consumption.
• Medical Devices: Can be used in medical devices where precise voltage regulation and low noise are essential for accurate sensor readings and device performance.
• Industrial Control Systems: Applicable in industrial control systems where a stable power supply is necessary for reliable operation.

Conclusion of LD3985J25R

The LD3985J25R from STMicroelectronics is a high-performance linear voltage regulator that offers a combination of low dropout voltage, low quiescent current, and robust protection features. Its fixed 2.5V output and 150mA output current make it suitable for a wide range of low-power applications. Despite its obsolete status, the LD3985J25R remains a reliable choice for designers seeking a compact, efficient, and stable power solution. Its compliance with environmental standards and availability in a surface mount package further enhance its appeal for modern electronic designs.