The LTC3528EDDB-2 is a versatile and efficient dual output step-up DC/DC converter from Linear Technology, designed to cater to the power requirements of portable electronic devices. This compact and powerful converter is ideal for applications that require small form factors without compromising on performance.

Key Features

• Wide Input Voltage Range: The device operates from an input voltage range of 0.7V to 5V, making it suitable for single-cell Li-Ion, multi-cell alkaline, or NiMH applications.
• Dual Output Voltages: It provides two independently regulated output voltages which can be as high as 5.25V, ensuring versatility in powering dual supply systems.
• High Efficiency: The LTC3528EDDB-2 boasts efficiencies up to 94%, thanks to its low quiescent current and the use of synchronous rectification.
• Adjustable Switching Frequency: The switching frequency can be set between 1.2MHz and 2.2MHz or synchronized to an external clock, allowing for flexibility in design and optimization of component sizes.
• Integrated Soft-Start Function: This feature limits inrush current during startup, providing a controlled power-up sequence and reducing stress on the input power source.

Applications

The LTC3528EDDB-2 is suitable for a wide range of applications, including but not limited to:

• Portable Medical Equipment
• Handheld Devices
• GPS Devices
• Wireless Modems
• MP3 Players

Additional Information

The device comes in a low-profile (0.75mm) 12-lead (3mm × 3mm) DFN package, which is ideal for space-constrained applications. It also features over-temperature protection and is designed to operate over a –40°C to 85°C temperature range, ensuring reliability across diverse operating conditions.

Conclusion

With its high efficiency, dual outputs, and compact size, the LTC3528EDDB-2 from Linear Technology stands as a robust solution for designers looking to maximize battery life while maintaining consistent performance in their portable and space-limited applications.