LT3684EMSE#PBF

Overview

The LT3684EMSE#PBF is a monolithic buck switching regulator from Analog Devices Inc., designed for high-efficiency power conversion. It accepts input voltages ranging from 3.6V to 34V, with a maximum limit of 36V. The device delivers a maximum output current of 2A and features an adjustable switching frequency between 300kHz and 2.8MHz. It utilizes a 10-MSOP package with an exposed pad (EP) for thermal management. The internal architecture includes a 0.18Ω switch and a boost Schottky diode, supporting positive, adjustable output voltages starting from 0.79V.

Feature Summary

• Integrates a high-efficiency 0.18Ω internal switch and boost Schottky diode for compact design
• Supports wide input voltage range up to 36V maximum with adjustable switching frequency
• Delivers 2A continuous output current in a thermally enhanced 10-MSOP package

Applications

• Industrial control systems requiring isolated or non-isolated DC-DC conversion
• Battery-powered equipment needing efficient step-down regulation
• Embedded systems with variable input voltage sources

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free RoHS-compliant packaging when ordering. Confirm the package type matches the 10-MSOP-EP specification required for thermal dissipation. Ensure the supplier provides official Analog Devices documentation to validate authenticity. Check for any tape-and-reel versus tube packaging variations if applicable to your assembly process. Cross-reference the full part number against the manufacturer's latest datasheet to confirm availability and pinout consistency.

Selection Notes

Select this component when a wide input voltage range up to 36V is required alongside a 2A output capability. The adjustable frequency feature allows optimization for size or efficiency based on external inductor selection. Consider the 10-MSOP-EP package for applications where board space is limited but thermal performance remains critical. This regulator is suitable for designs needing a single-output positive voltage configuration without external synchronous rectifiers.

Part Context

The LT3684 belongs to Analog Devices' family of high-voltage buck regulators. It shares architectural similarities with other parts in the series but is distinct in its 2A current rating and specific frequency range. The EMSE#PBF designation identifies the commercial temperature grade and lead-free plastic MSOP package variant within the broader LT3684 product line.

Replacement Considerations

LT3680EMSE#PBF offers higher current capacity at 3.5A with similar input specifications. LT3684EDD#TRPBF provides the same electrical performance in a DFN package instead of MSOP. Verify pin compatibility and thermal requirements before substituting.