LTC3446EDE#PBF

Voltage Regulators - Linear + Switching Overview

The LTC3446EDE#PBF is a power management IC from Analog Devices that integrates one synchronous buck regulator and two low dropout linear regulators. It provides three independent output voltage rails from a single input source ranging from 2.7V to 5.5V. The buck converter delivers up to 1A, while each LDO supplies 300mA. This configuration allows for efficient generation of multiple lower voltages, such as 1.2V, 1.5V, or 1.8V, directly from a lithium-ion battery or similar single-cell supply.

Voltage Regulators - Linear + Switching Feature Summary

• Integrates a 1A synchronous buck converter with two 300mA very low dropout linear regulators in a single package
• Generates up to three stepped-down output voltages from a single input voltage range of 2.7V to 5.5V
• Supports output voltage ranges extending down to 0.4V for the LDO regulators and 0.8V for the buck converter

Voltage Regulators - Linear + Switching Applications

• Powering multiple logic and analog circuits from a single lithium-ion battery
• Portable electronic devices requiring simultaneous low-voltage rails
• Embedded systems needing compact multi-rail power solutions

Voltage Regulators - Linear + Switching Procurement Notes

Verify the specific suffix PBF indicates lead-free compliance when ordering. Confirm the EDE package type matches your PCB footprint requirements. Ensure the input voltage stays within the 2.7V to 5.5V operational range for proper regulation. Check current demands against the 1A buck and 300mA LDO limits to prevent overload.

Voltage Regulators - Linear + Switching Selection Notes

Select this component when space constraints require integrating multiple regulators into one chip. It is suitable for applications powered by a single cell where efficiency and board area are critical. Consider the thermal performance if operating near maximum current limits. Verify that the required output voltages fall within the specified minimum thresholds for both the buck and LDO sections.

Voltage Regulators - Linear + Switching Part Context

This device belongs to the LTC3446 series, designed for high-efficiency power management in portable electronics. It combines switching and linear regulation technologies to optimize performance across different load conditions. The integration reduces the component count compared to using discrete regulators, simplifying the design process for multi-rail systems.

Voltage Regulators - Linear + Switching Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation.