LTC3446IDE#PBF

Overview

The LTC3446IDE#PBF is a power management integrated circuit manufactured by Analog Devices Inc. It integrates one 1A synchronous buck regulator and two 300mA Very Low Dropout (VLDO) linear regulators within a single package. The device operates from an input voltage range of 2.7V to 5.5V, typically derived from a single lithium-ion battery. It provides three independent stepped-down output voltages. The buck converter supports output voltages down to 0.8V, while the VLDO regulators support outputs down to 0.4V. The component is housed in a 16-lead SSOP package.

Feature Summary

• Integrates a high-efficiency 1A synchronous buck converter with two 300mA low-dropout linear regulators for multi-rail generation
• Supports wide input voltage ranges suitable for single-cell lithium-ion battery applications
• Enables significant board space reduction by combining three distinct regulation functions into one compact package

Applications

• Portable electronic devices requiring multiple low-voltage rails from a single battery source
• Battery-powered embedded systems needing efficient step-down conversion alongside low-noise LDO regulation
• Compact consumer electronics where PCB area constraints limit the use of discrete components

Procurement Notes

Verify the specific suffix and package type against official Analog Devices documentation to ensure compatibility with your design requirements. Confirm availability status through authorized distributors as supply levels may vary. Ensure that the thermal performance of the SSOP package meets your application's heat dissipation needs under maximum load conditions.

Selection Notes

Select this component when a design requires three regulated outputs from a single 2.7V to 5.5V source. The integrated buck regulator offers higher efficiency for loads up to 1A, while the VLDOs provide clean power for sensitive analog circuits at lower currents. Consider the thermal limitations of the SSOP package if operating near maximum current ratings.

Part Context

This part belongs to the LTC3446 family of mixed-signal power management ICs designed for portable applications. It consolidates switching and linear regulation technologies to simplify power architecture. The integration reduces component count and assembly complexity compared to using separate discrete regulators for each voltage rail.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.