LT3689IMSE#TRPBF

Overview

The LT3689IMSE#TRPBF is a synchronous step-down switching voltage regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.4 V to 38 V and delivers up to 700 mA of output current. The device integrates a power-on reset generator and a watchdog timer for system protection. It features a fixed 2 MHz switching frequency, adjustable shutdown control, and low quiescent current of 50 µA. The component is housed in a thermally enhanced 16-lead MSOP package and supports operation from -40°C to +125°C.

Feature Summary

• Integrated power-on reset generator and watchdog timer for enhanced system reliability
• Synchronous buck topology providing high efficiency across load ranges
• Fixed 2 MHz switching frequency enabling compact external component selection
• Low quiescent current consumption during active and shutdown modes

Applications

• Industrial control systems requiring fault monitoring
• Automotive electronics operating within wide input voltage ranges
• Portable equipment needing efficient power management
• Embedded systems utilizing integrated safety timers

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing. Confirm availability status as supply may be limited or subject to factory orders. Ensure compatibility with existing PCB footprints for the 16-MSOP package. Cross-reference datasheet revisions for any parameter updates prior to final procurement decisions.

Selection Notes

Select this component when a fixed 2 MHz frequency suits the design constraints. Choose the IMSE variant for industrial temperature performance. Consider the integrated reset and watchdog features if board space for discrete logic is limited. Verify that the 700 mA output current meets the maximum load requirements of the target application circuit.

Part Context

This part belongs to the LT3689 family of synchronous buck regulators designed for high-efficiency power conversion. It distinguishes itself by combining regulation with essential system management functions like reset generation and watchdog timing. The MSOP-16 package allows for compact implementation in space-constrained designs compared to larger regulator packages.

Replacement Considerations

LT3689IMSE-5#PBF is a pin-compatible alternative with tube packaging instead of tape-and-reel.