LTC3528EDDB-2#TRMPBF - High-Efficiency, Dual-Channel, Step-Up DC/DC Converter

The LTC3528EDDB-2#TRMPBF from Linear Technology is a versatile, high-efficiency, synchronous, fixed-frequency, dual-channel step-up DC/DC converter that is designed to meet the rigorous power demands of portable electronics. It is housed in a compact, low-profile (0.75mm) 8-lead DFN package, making it ideal for space-constrained applications.

Key Features:

• Wide Input Voltage Range: This device operates from an input voltage range of 0.85V to 5.5V, making it suitable for single-cell Li-Ion, multi-cell alkaline, or NiMH applications as well as other standard power sources.
• Dual Channel Output: It offers two independent output channels with fixed voltages of 3.3V and 5V, respectively, which can deliver up to 50mA of continuous output current each, providing flexibility for powering dual supply applications.
• High Efficiency: With its internal synchronous rectification, the LTC3528EDDB-2#TRMPBF provides high efficiency of up to 94%, reducing heat generation and extending battery life.
• Low Quiescent Current: The device features a low quiescent current of only 7µA, further enhancing its suitability for battery-powered devices by minimizing the drain on the battery when in standby mode.
• Fixed Frequency Operation: Operating at a fixed frequency of 1MHz allows the use of small, low-cost capacitors and inductors while minimizing noise that could interfere with RF and audio circuits.
• Burst Mode Operation: Its Burst Mode operation ensures high efficiency at low output currents, which is critical for maximizing battery life in portable applications.
• Thermal Protection: The device includes thermal shutdown protection to safeguard the device under over-temperature conditions.
• Package: The product is available in a 3mm x 3mm DFN package, which is RoHS compliant and suitable for automated assembly processes.

Applications:

The LTC3528EDDB-2#TRMPBF is ideal for powering dual voltage systems in portable electronics, such as handheld medical devices, wireless modems, MP3 players, and GPS devices. Its ability to convert power from a single battery cell into two regulated outputs makes it a versatile choice for designers looking to maximize the performance of their compact, battery-operated products.