Analog Devices Inc.

LT1939EDD

LT1939EDD Description

The LT1939EDD is a dual output power management integrated circuit (PMIC) designed by Analog Devices Inc. This versatile IC combines the of functionality a buck regulator with a linear regulator, offering a compact and efficient solution for a wide range of power management needs. The LT1939EDD is housed in a surface-mount package, specifically a tube, making it suitable for applications where space is a premium. It features two outputs, with the first capable of delivering up to 2A at a voltage range of 0.8V to 24.25V, and the second providing output up to 1A within the same voltage range. The switching frequency of the buck regulator can be adjusted between 500kHz and 2.4MHz, allowing for optimization based on specific application requirements. The supply voltage for the LT1939EDD ranges from 3V to 25V, making it compatible with a variety of power sources.

LT1939EDD Features

• Dual Output Configuration: The LT1993EDD offers two output channels, providing flexibility in power management applications. The first output can deliver up to 2A, while the second output can handle up to 1A, both within a voltage range of 0.8V to 24.25V.
• Adjustable Switching Frequency: The buck regulator's switching frequency can be tuned between 500kHz and 2.4MHz enabling, designers to optimize for efficiency and performance based on their specific requirements.
• Wide Input Voltage Range: The LT1939EDD operates from a supply voltage of 3V to 25V, ensuring compatibility with a broad range of power sources.
• Surface-Mount Package: Housed in a tube package, the LT1939EDD is designed for surface-mount applications, making it ideal for compact and space-constrained designs.
• Moisture Sensitivity Level (MSL) 1: The LT1939EDD has an MSL rating of 1 (unlimited), indicating that it is not sensitive to moisture, which is beneficial for applications in various environmental conditions.

LT1939EDD Applications

The LT1939EDD is well-suited for a variety of applications where efficient power management is critical. Its dual output configuration and wide operating voltage range make it ideal for:

• Consumer Electronics: Powering devices that require multiple voltage rails, such as smartphones, tablets, and portable gaming consoles.
• Industrial Equipment: Providing reliable power management for industrial control systems, sensors, and actuators.
• Telecommunications: Ensuring stable power delivery in base stations, routers, and other communication infrastructure.
• Automotive Systems: Managing power in vehicle infotainment systems, electronic control units (ECUs), and advanced driver-assistance systems (ADAS).

Conclusion of LT1939EDD

The LT1939EDD from Analog Devices Inc. is a robust and versatile power management IC that offers significant benefits in terms of flexibility and performance. Its dual output capability, adjustable switching frequency, and wide input voltage range make it a valuable component for a wide array of applications. Despite being marked as obsolete, the LT1939EDD remains a reliable choice for designers seeking a compact and efficient power management solution.