Analog Devices Inc.

LTC3621EDCB-2

LTC3621EDCB-2 Description

The LTC3621EDCB-2 is a high-efficiency, synchronous step-down DC/DC converter from Analog Devices Inc., designed for compact, power-sensitive applications. This 1A output buck regulator operates over a 2.7V to 17V input range, delivering an adjustable output voltage from 0.6V to 17V. With a switching frequency of 2.25MHz, it enables the use of small external components, making it ideal for space-constrained designs. The device features a synchronous rectifier for improved efficiency and thermal performance. Packaged in a 6-pin DFN tube, it is suited for surface-mount applications and complies with MSL 1 (Unlimited) for moisture sensitivity.

LTC3621EDCB-2 Features

• High Efficiency: Synchronous rectification minimizes power loss, achieving peak efficiency.
• Wide Input Range: Supports 2.7V–17V, accommodating diverse power sources.
• Adjustable Output: Configurable from 0.6V to 17V for flexibility in low-voltage applications.
• High Switching Frequency (2.25MHz): Reduces inductor and capacitor size, saving PCB space.
• Compact 6-DFN Package: Ideal for portable and space-constrained designs.
• 1A Continuous Output Current: Suitable for moderate power loads.
• Obsolete Status: May require alternative sourcing for new designs but remains viable for legacy systems.

LTC3621EDCB-2 Applications

• Portable Electronics: Smartphones, tablets, and wearables benefit from its compact size and efficiency.
• Industrial Systems: Power management in sensors, PLCs, and embedded controllers.
• Battery-Powered Devices: Extends runtime in IoT nodes and handheld instruments.
• Point-of-Load (POL) Regulation: Provides stable voltage for FPGAs, ASICs, and processors.
• Automotive Accessories: Non-critical systems like infotainment or lighting.

Conclusion of LTC3621EDCB-2

The LTC3621EDCB-2 excels in efficiency, size, and flexibility, making it a strong choice for low-power, high-density designs. While marked as obsolete, its performance in portable, industrial, and battery-operated systems remains noteworthy. Engineers should evaluate replacement options for new projects but can leverage its high-frequency operation and synchronous topology in existing applications. For legacy systems requiring a small-footprint, adjustable buck regulator, this IC delivers reliable performance.