LT3667HUDD#PBF

Overview

The LT3667HUDD#PBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It accepts input voltages from 4.3V to 40V and provides three adjustable outputs with a maximum output current of 400mA per channel. The device operates at a fixed switching frequency of 2.2MHz and features a typical quiescent current of 50µA. It is housed in a QFN-24 package and supports an operating temperature range from -40°C to +150°C.

Feature Summary

• Integrates dual fault protection mechanisms for enhanced system reliability
• Features high efficiency synchronous buck topology with integrated power switches
• Supports shutdown mode for low power consumption applications

Applications

• Industrial control systems requiring multi-rail power distribution
• Automotive electronics operating within extended temperature ranges
• Portable instrumentation powered by single-cell battery sources

Procurement Notes

Verify the specific suffix HUDD against official Analog Devices documentation to confirm the extended temperature grade and package variant. Ensure compatibility with the DC1869A evaluation kit if performance validation is required during the design phase. Cross-reference RoHS compliance details directly with the manufacturer's latest environmental declarations.

Selection Notes

Select this component when designing circuits that require three independent regulated rails from a single high-voltage input source. The wide input voltage range accommodates various industrial and automotive bus architectures. Consider the thermal performance of the QFN-24 package relative to the total load current across all three channels.

Part Context

This part belongs to the LT3667 series of triple-output synchronous buck regulators. It shares architectural similarities with other members like the LT3667IUDD but differs in temperature rating and package specifications. The series targets applications needing compact, multi-voltage power solutions without external diodes.

Replacement Considerations

LT3667IUDD#PBF serves as a verified alternative within the same family, offering identical electrical functionality but with a lower maximum operating temperature specification.