Linear Technology's LTC3552EDHC Power Management Solution

The LTC3552EDHC from Linear Technology is a highly integrated power management and battery charger IC, designed to cater to the demanding needs of portable electronic devices. This compact and efficient solution is housed in a 16-lead DFN package, which is ideal for space-constrained applications. The LTC3552EDHC combines a synchronous buck regulator, a synchronous boost regulator, and a full-featured Li-Ion/Polymer battery charger, making it a versatile choice for designers looking to optimize power management in their products.

Key Features

• Integrated Power Management: The device includes a high-efficiency, 1A buck regulator with an input voltage range of 2.7V to 5.5V, and a 5V, 500mA boost regulator, providing a constant output for USB On-The-Go applications.
• Programmable Charge Rate: The LTC3552EDHC features a programmable battery charge rate up to 950mA from a USB source, and up to 1.5A from a wall adapter, allowing for flexibility in charging protocols and faster charge times.
• Automatic PowerPath Control: It offers instant-on operation with discharged battery and automatic load prioritization between system load and battery charging.
• Thermal Regulation: The IC includes thermal regulation to maximize the charge rate without the risk of overheating.
• Battery Float Voltage: The battery float voltage is preset at 4.2V, but it can be adjusted via an external resistor divider to accommodate other chemistries.
• No External FETs Required: The LTC3552EDHC integrates all the necessary power switches, eliminating the need for external FETs and simplifying the design process.

Applications

The LTC3552EDHC is suitable for a variety of portable devices, including:

• Smartphones
• Portable Media Players
• Handheld Instruments
• GPS Devices
• Digital Cameras

With its comprehensive set of features and compact form factor, the LTC3552EDHC provides a robust power management solution that enhances the performance and reliability of battery-powered devices. Its design enables efficient power conversion, advanced battery charging capabilities, and secure operation, making it an excellent choice for designers focused on creating the next generation of portable electronics.