LTC3126IFE

Voltage Regulators - DC DC Switching Regulators Overview

The LTC3126IFE is a high-efficiency synchronous buck converter featuring an internal no-loss PowerPath for seamless operation from two independent input sources. It supports wide input voltage ranges, typically 2.4V to 42V or 6V to 42V depending on configuration, and provides regulated outputs such as 3.3V at 2.5A or 5V at 2.5A. The device operates with switching frequencies of 1MHz or 2MHz and achieves efficiencies up to 95%. It utilizes a DFN package suitable for space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Internal no-loss PowerPath enables seamless transition between dual input power sources without interruption.
• Synchronous buck topology ensures high conversion efficiency across varying load conditions.
• Supports flexible input voltage ranges compatible with automotive and battery applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive systems requiring redundant power inputs
• Battery-powered devices needing backup power integration
• Photovoltaic powered USB supply circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific output voltage and current rating required for your design, as the LTC3126 family includes variants for 3.3V, 5V, and 12V outputs. Confirm the switching frequency (1MHz vs 2MHz) matches your inductor selection. Ensure the DFN package footprint aligns with your PCB layout constraints. Cross-reference the suffix with official Analog Devices documentation to confirm pinout and thermal characteristics.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when dual-input redundancy is critical for system uptime. The integrated PowerPath simplifies external diode management. Consider the switching frequency trade-off between component size and efficiency. Verify that the input voltage range covers both primary and backup source variations. Ensure thermal performance meets requirements for the chosen load current.

Voltage Regulators - DC DC Switching Regulators Part Context

The LTC3126 belongs to Analog Devices' PowerPath series, designed for robust power management in mobile and automotive environments. It integrates synchronous rectification to minimize losses. The IFE suffix indicates a specific temperature grade and package variant within the broader LTC3126 product line, focusing on industrial reliability.

Voltage Regulators - DC DC Switching Regulators FAQ

How does the PowerPath function with two inputs?

The internal PowerPath seamlessly manages power flow from two separate sources, allowing one to take over if the other fails, ensuring continuous operation without external blocking diodes.

What is the typical efficiency of the LTC3126IFE?

The device achieves efficiencies up to 95% due to its synchronous buck topology and low RDS(ON) switches.