LT3667IUDD#TRPBF

Overview

The LT3667IUDD#TRPBF is a triple synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 4.3 V to 40 V and delivers up to 400 mA per channel. The device integrates three independent buck converters within a QFN-24 package, featuring a fixed switching frequency of 2.2 MHz. It supports a maximum output voltage of 38.6 V per channel and maintains a quiescent current of 40 uA. The component functions reliably across an operating temperature range from -40°C to +125°C.

Feature Summary

• Integrates three independent synchronous buck converters in a single compact package
• Includes dual fault protection mechanisms for enhanced system reliability
• Supports wide input voltage ranges suitable for industrial power applications

Applications

• Industrial control systems requiring multiple isolated or non-isolated low-voltage rails
• Distributed power architectures in telecommunications infrastructure
• Embedded systems needing compact multi-output power solutions

Procurement Notes

Verify the specific suffix against official documentation to confirm tape-and-reel packaging versus tube configuration. Confirm RoHS compliance status through the manufacturer's latest datasheet. Ensure the part number matches the exact thermal grade and package variant required for your design. Cross-reference with authorized distributors to validate authenticity and supply chain integrity before procurement.

Selection Notes

Select this component when designing circuits that require three separate regulated outputs from a single high-voltage source. The fixed 2.2 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the thermal performance of the QFN-24 package relative to the total load current across all three channels. Ensure the input voltage remains within the specified 4.3 V to 40 V window for stable operation.

Part Context

This part belongs to the LT3667 family of triple synchronous buck regulators. It shares architectural similarities with other multi-channel power management ICs but distinguishes itself through its specific 40V input rating and integrated fault protection features. The series is designed for applications demanding high efficiency and minimal board space utilization in complex electronic systems.

Replacement Considerations

LT3667HUDD#PBF offers similar functionality with an extended maximum operating temperature of +150°C.