LT3689EMSE-5#TRPBF

Overview

The LT3689EMSE-5#TRPBF is a synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates within an input voltage range of 3.4 V to 38 V and delivers a fixed 5 V output at up to 700 mA. The device features a low quiescent current of 50 uA and supports a switching frequency of 2 MHz. Packaged in a 16-lead MSOP with exposed pad, it functions across a temperature range of -40°C to +125°C.

Feature Summary

• Integrates power-on reset and watchdog timer for system protection
• Synchronous buck topology for enhanced efficiency
• Supports shutdown mode for power management

Applications

• Industrial control systems requiring reliable power regulation
• Embedded applications needing integrated fault protection
• Battery-powered devices utilizing low quiescent current operation

Procurement Notes

Verify component authenticity through authorized channels due to limited supply status. Confirm package marking and datasheet alignment. Check regional distribution restrictions. Validate RoHS compliance documentation. Ensure storage conditions meet moisture sensitivity requirements.

Selection Notes

Select this regulator when a fixed 5 V output is required from high-voltage inputs up to 38 V. The integrated watchdog and reset features simplify design for critical systems. Consider the 2 MHz frequency for smaller passive components. Evaluate thermal performance in the MSOP-16 package for the specific application load.

Part Context

This part belongs to the LT3689 series of switching regulators. It is designed for applications requiring robust fault protection alongside efficient DC-DC conversion. The manufacturer integrates safety features directly into the silicon to reduce external component count.

Replacement Considerations

No public confirmed substitute part numbers are available.