LT8618EDDB-3.3#TRMPBF

Overview

The LT8618EDDB-3.3#TRMPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc., designed for high-efficiency power conversion in compact spaces. It features a fixed 3.3V output with a maximum current of 100mA and supports an input voltage range from 3.4V to 60V. The device operates at a programmable switching frequency between 200kHz and 2.2MHz, allowing optimization for size or efficiency. Packaged in a 10-WFDFN (3x2) exposed pad surface-mount package, it ensures robust thermal performance and low profile suitable for space-constrained applications.

Feature Summary

• Integrated synchronous rectification architecture for enhanced conversion efficiency across varying load conditions
• Programmable switching frequency capability enabling design flexibility between electromagnetic interference reduction and component size optimization
• Wide input voltage tolerance supporting direct connection to higher voltage bus systems without external level shifting

Applications

• Industrial control systems requiring isolated or non-isolated low-power regulation
• Automotive electronics operating within wide voltage fluctuation environments
• Embedded sensor nodes and IoT devices demanding minimal footprint power solutions

Procurement Notes

Verify the specific suffix #TRMPBF indicates tape and reel packaging with moisture sensitivity level 1 when ordering. Confirm that the EDDB variant meets the required industrial temperature specifications compared to other grade options. Ensure compatibility with standard surface mount assembly processes given the exposed pad thermal design requirements.

Selection Notes

Select this component when a fixed 3.3V rail is needed from a variable or high-voltage source up to 60V. Consider the 100mA output limit against total system quiescent and dynamic loads. Evaluate the need for synchronous operation versus simpler linear regulators if noise and efficiency are critical constraints in the power budget.

Part Context

This part belongs to the LT8618 family of high-voltage synchronous buck converters. It shares architectural similarities with other members like the LT8618IDDB but differs in electrical grading and packaging specifics. The series targets applications needing reliable step-down conversion with minimal external component count while maintaining high efficiency over a broad input range.

Replacement Considerations

LT8618IDDB-3.3#TRMPBF serves as a verified alternative within the same product family offering identical functional parameters.