LTC3672BEDC-1

Overview

The LTC3672BEDC-1 is a triple power supply component manufactured by Analog Devices Inc., featuring a synchronous buck regulator and two low-dropout linear regulators (LDOs). It operates within an input voltage range of 2.9V to 5.5V, making it suitable for single-cell lithium-ion applications. The device provides fixed outputs of 1.8V from the buck converter, 1.2V from LDO1, and 2.8V from LDO2. It supports output currents up to 400mA for the buck stage and 150mA for each LDO. The unit is housed in a compact 2mm x 2mm x 0.75mm 8-Lead DFN package.

Feature Summary

• Integrates a 400mA synchronous buck regulator with two 150mA LDOs for multi-rail power generation
• Features internal control loop compensation to minimize external component count
• Includes independent soft-start functionality for each output to manage inrush current

Applications

• Powering digital logic, I/O interfaces, FPGAs, and ASICs requiring multiple voltage rails
• Mobile devices such as cellphones and handheld products including PDAs, PMPs, and GPS units
• Single-cell Lithium-Ion and Lithium-Polymer battery powered systems

Procurement Notes

Verify the specific suffix BEDC against official datasheets to confirm temperature grade and packaging configuration. Ensure compatibility with the required input voltage range of 2.9V to 5.5V for your target application. Confirm that the fixed output voltages of 1.8V, 1.2V, and 2.8V align with system requirements, as these are not adjustable on this specific variant.

Selection Notes

Select this component when a compact solution is needed to generate three distinct voltage rails from a single 3.7V nominal source. It is ideal for space-constrained portable electronics where minimizing external passive components is critical. The integrated soft-start and internal compensation simplify PCB layout and reduce design time compared to discrete solutions.

Part Context

This part belongs to the LTC3672 family of triple-output power management ICs designed for mobile applications. It consolidates buck and LDO regulation into a single small footprint, reducing board area significantly. The series targets applications requiring efficient step-down conversion alongside precise linear regulation for sensitive analog or digital loads.

Replacement Considerations

Check for other variants within the LTC3672 family that may offer different output configurations or thermal performance. Verify if alternative packages such as QFN or MSOP are available if the 8-Lead DFN form factor does not suit the manufacturing process.