LT3640EUFD#PBF

Overview

The LT3640EUFD#PBF is a dual monolithic buck switching regulator manufactured by Analog Devices. It operates with an input voltage range of 4V to 35V and delivers up to 1.3A output current per channel. The device features a fixed 2.5MHz switching frequency and a typical quiescent current of 275µA. It provides two adjustable outputs, supports shutdown functionality, and includes integrated power-on reset and watchdog timer circuits. The component is housed in a 28-lead QFN package and is rated for operation between -40°C and +125°C.

Feature Summary

• Dual synchronous buck converter topology
• Integrated power-on reset and watchdog timer
• Fixed high-frequency switching operation

Applications

• Industrial control systems
• Telecommunications infrastructure
• Automotive electronics

Procurement Notes

Verify the specific suffix 'EUFD' against official Analog Devices documentation to confirm temperature grade and packaging details. Ensure compatibility with required input voltage ranges and thermal management solutions for the QFN-28 package. Cross-reference datasheet revisions to validate pinout and electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when dual isolated or non-isolated buck conversion is required within a compact footprint. The integrated reset and watchdog features simplify system monitoring logic. Verify that the 2.5MHz frequency aligns with EMI constraints and inductor size requirements compared to lower-frequency alternatives.

Part Context

This part belongs to the LT3640 family of dual monolithic buck regulators designed for space-constrained applications. It integrates power switches and control circuitry to minimize external component count. The EUFD suffix typically denotes industrial temperature range performance and tube packaging.

Replacement Considerations

LT3640IUFD#PBF: Verified equivalent from the same manufacturer series.