Linear Technology LTC3403EDD#PBF Overview

The LTC3403EDD#PBF is a high-efficiency, monolithic synchronous buck regulator from Linear Technology, a renowned leader in the design and manufacture of high-performance analog integrated circuits. This product offers a compact and efficient power management solution for portable devices, with a wide input voltage range and a high switching frequency that enables a small, low-profile footprint.

Key Features of the LTC3403EDD#PBF

• High Efficiency: Capable of up to 95% efficiency, the LTC3403EDD#PBF ensures minimal power loss and heat generation, making it ideal for battery-powered applications.
• Adjustable Output Voltage: The output voltage is adjustable down to 0.8V, which provides flexibility for various applications and ensures compatibility with modern low-voltage digital circuits.
• Wide Input Voltage Range: Designed to operate from an input voltage range of 2.5V to 5.5V, it supports a variety of power sources, from single-cell Li-Ion batteries to multi-cell alkaline batteries.
• High Switching Frequency: With a 2.25MHz switching frequency, the LTC3403EDD#PBF allows the use of small surface-mount inductors and capacitors, reducing the overall solution size and improving transient response.
• No Schottky Diode Required: The internal synchronous rectification increases efficiency and eliminates the need for an external Schottky diode, simplifying the design and saving board space.
• Thermal Protection: It includes thermal shutdown protection, which safeguards the device against overheating and potential damage.
• Low Dropout Operation: The regulator's low dropout operation ensures continued functionality even as the input voltage approaches the output voltage, extending battery life.

Applications

The LTC3403EDD#PBF is suitable for a wide range of applications, particularly where space and power efficiency are critical. It is an excellent choice for portable medical devices, handheld instruments, and wearable technology. Its high efficiency and compact size also make it ideal for powering CPUs, FPGAs, and other digital ICs in space-constrained applications.

Package and Reliability

This regulator is available in a 10-lead DFN (3mm x 3mm) package, which is designed to optimize board space in densely packed layouts. The LTC3403EDD#PBF is RoHS compliant and is specified over a commercial and industrial temperature range, ensuring reliable performance in a variety of environments.