Introducing the LTC3554EPD: The Integrated Power Management Solution

Linear Technology's LTC3554EPD is a versatile integrated power management solution designed for space-constrained applications. This compact, high-efficiency product combines a USB-compatible linear charger, a PowerPath™ manager, an overvoltage protection controller, and multiple synchronous step-down regulators in a single package, making it an ideal choice for portable electronic devices.

Key Features:

• Efficient Power Management: The LTC3554EPD includes two high-efficiency, 600mA buck regulators with selectable Burst Mode® operation for improved efficiency at light loads. This feature helps in prolonging battery life by reducing the quiescent current draw when the device is in standby mode.
• USB-Compatible Linear Charger: The integrated linear charger is designed for single-cell lithium-ion batteries, offering a programmable charge current up to 950mA. The charger also supports a "suspend" mode to comply with USB specifications when connected to a USB port.
• PowerPath Control: With the PowerPath control feature, the LTC3554EPD seamlessly manages power distribution between the battery and external sources, ensuring uninterrupted operation even when the battery is being charged.
• Overvoltage Protection: The device includes overvoltage protection (OVP) up to 16V, safeguarding the downstream components from potential damage caused by voltage spikes.
• Compact Design: Housed in a compact, low-profile (0.75mm) 20-pin 4mm x 4mm QFN package, the LTC3554EPD saves valuable board space and is suitable for slim, modern designs.
• Wide Operating Range: The LTC3554EPD operates from a 4.35V to 5.5V input voltage range, accommodating a variety of power sources including USB ports and wall adapters.
• Thermal Protection: The device features thermal shutdown protection, which prevents overheating by automatically reducing charge current.

Applications:

The LTC3554EPD is designed for a wide range of portable applications, including:

• Smartphones and PDAs
• Portable media players
• Digital cameras
• Handheld GPS units
• Other USB-powered devices

With its comprehensive set of features, the LTC3554EPD from Linear Technology provides a highly integrated, efficient, and reliable power management solution for the next generation of portable electronics.