LTC3407IDD-2#TRPBF

Updated: 2026-09-12

Overview

The LTC3407IDD-2#TRPBF is a monolithic synchronous buck regulator from Analog Devices, designed for battery-powered applications requiring high efficiency in minimal space. It operates from 2.5V to 5.5V input range and delivers up to 600mA of output current at a fixed 2.5V. The device integrates both main and synchronous switches to minimize external component count, making it ideal for space-constrained designs. Its current-mode architecture provides fast transient response while maintaining stability across various load conditions.

Structure and Working Principle

The IC utilizes a synchronous rectification topology with internal MOSFET switches operating at 1.5MHz fixed frequency. This high switching frequency allows for small external inductors and capacitors, reducing overall solution size. Internal compensation simplifies design while maintaining good load regulation. The device enters Burst Mode operation at light loads to maintain high efficiency across the entire load range, drawing only 20μA of quiescent current when regulating.

Key Features

Key features include 95% peak efficiency, ultra-low quiescent current, and 100% duty cycle capability for low dropout operation. The 2mm × 2mm DFN package makes it suitable for portable applications where board space is at a premium. The device includes built-in soft-start, current limiting, and thermal shutdown protection. Its synchronous design eliminates the need for an external Schottky diode, further reducing solution size and cost.

Application Areas

Primary applications include smartphones, portable medical devices, handheld instruments, and IoT sensors. It's particularly suited for battery-powered systems where extended runtime is critical. The fixed 2.5V output version (LTC3407IDD-2) is commonly used to power microprocessors, memory, and other digital ICs in portable electronics. Its small footprint and high efficiency make it ideal for space-constrained designs.

Maintenance and Precautions

While the device is robust, proper PCB layout is essential for optimal performance. Follow recommended layout guidelines for power and ground planes to minimize switching noise and ensure thermal performance. ESD precautions should be observed during handling. The device should be stored in moisture-sensitive packaging until use, with proper baking if exposure exceeds the moisture sensitivity level.

B2B Procurement Guide

When procuring LTC3407IDD-2#TRPBF, verify authenticity through authorized distributors to avoid counterfeit components. Consider minimum order quantities and lead times, as specialty ICs may have longer procurement cycles. Evaluate total solution cost including external components. For high-volume applications, consult manufacturer representatives for potential cost optimization through alternative packaging or custom solutions.