LT3693IDD#PBF

Overview

The LT3693IDD#PBF is a monolithic synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.6V to 36V and delivers a continuous output current of 3.5A. The device features an adjustable output voltage starting from 0.79V up to 30V, regulated through a single positive output configuration. Internal switching frequency is programmable between 230kHz and 2.45MHz. The component is housed in a 10-MSOP package with an exposed thermal pad (10-MSOP-EP) for efficient heat dissipation. It supports operation across a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrated synchronous rectification architecture eliminates the need for external Schottky diodes, improving efficiency and reducing component count.
• Programmable switching frequency allows optimization for either high efficiency at lower frequencies or smaller passive component size at higher frequencies.
• Built-in cycle-by-cycle current limit and thermal shutdown protection ensure robust operation under overload and high-temperature conditions.

Applications

• Point-of-load regulation for industrial control systems
• Power supply stages for embedded computing platforms
• Battery-powered equipment requiring wide input voltage tolerance

Procurement Notes

Verify the specific suffix IDD#PBF against the manufacturer's latest datasheet to confirm the industrial temperature grade (-40°C to 125°C) and tube packaging format. Ensure compatibility with the 10-MSOP-EP footprint and thermal requirements during design review. Cross-reference part numbers carefully as suffixes define critical electrical and mechanical specifications.

Selection Notes

Select this component when a single-output buck converter is required with an input voltage up to 36V and a load current of 3.5A. It is suitable for designs prioritizing compactness via the 10-MSOP package while maintaining high efficiency. Consider the programmable frequency range to balance EMI performance against inductor size constraints.

Part Context

The LT3693 belongs to Analog Devices' family of high-voltage synchronous buck regulators. It shares functional similarities with the LT3680 but offers distinct pinout and feature variations. The IDD#PBF designation specifically identifies the industrial temperature variant packaged in tubes, distinguishing it from other grade or packaging options within the LT3693 series.

Replacement Considerations

LT3680EMSE#TRPBF, LT3680HMSE#TRPBF, LT3680IMSE#TRPBF, LT3693EMSE#TRPBF are documented parameter-equivalent alternatives.