LTC3446EDE#TRPBF

Overview

The LTC3446EDE#TRPBF is a power management IC from Analog Devices Inc., housed in a DFN-12 package. It integrates one 1A synchronous buck regulator and two 300mA Very Low Dropout (VLDO) linear regulators. The device operates with an input voltage range of 2.7V to 5.5V, suitable for single-cell lithium-ion or lithium-polymer battery applications. The buck converter provides an adjustable output voltage starting from 0.8V, while the VLDOs support outputs down to 0.4V. This configuration allows the generation of up to three stepped-down supply rails from a single input source.

Feature Summary

• Integrates a high-current synchronous buck converter alongside two low-dropout linear regulators within a single compact package.
• Supports multiple output voltage rails derived from a single input source, simplifying system power architecture.
• Features Very Low Dropout (VLDO) regulators capable of maintaining regulation at minimal voltage differentials.

Applications

• Portable electronic devices requiring multiple low-voltage supplies from a single cell
• Battery-powered systems utilizing lithium-ion or lithium-polymer cells
• Embedded applications needing efficient step-down conversion and clean LDO outputs

Procurement Notes

Verify the specific suffix and tape/reel packaging details against the manufacturer's official documentation prior to ordering. Confirm that the DFN-12 footprint matches the target PCB design constraints. Ensure compatibility with the intended input voltage range and thermal requirements for the application environment.

Selection Notes

Select this component when a design requires three distinct regulated outputs from a single battery source. The integrated topology reduces component count compared to discrete solutions. Consider the current capabilities of the buck versus the LDOs to match load requirements efficiently.

Part Context

This part belongs to the LTC3446 series, designed for space-constrained portable electronics. It consolidates switching and linear regulation functions to minimize board area. The DFN-12 package facilitates surface-mount assembly while providing adequate thermal dissipation for the integrated power stages.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Analog Devices official resources for cross-reference data if alternative sourcing is required.