LT3689EUD#TRPBF

Overview

The LT3689EUD#TRPBF is a monolithic synchronous step-down switching 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 features a fixed 2 MHz switching frequency and maintains a typical quiescent current of 50 uA. It provides an adjustable output voltage from 800 mV to 34.2 V. Integrated functionalities include a power-on reset generator and a watchdog timer. The component is housed in a 16-lead QFN package and supports operation temperatures from -40°C to +125°C.

Feature Summary

• Integrates a power-on reset generator and a watchdog timer for system reliability
• Features a high-efficiency synchronous buck topology with internal power switches
• Supports wide input voltage ranges suitable for various supply sources

Applications

• Portable instrumentation requiring low quiescent current
• Industrial control systems needing robust reset and monitoring features
• Battery-powered equipment utilizing wide input voltage ranges

Procurement Notes

Verify the specific suffix EUD against official Analog Devices documentation to confirm the exact package type and temperature grade. Ensure compatibility with required output voltage settings and thermal management strategies for the QFN-16 footprint. Cross-reference the datasheet for any recent product change notices or lifecycle status updates before finalizing procurement plans.

Selection Notes

Select this component when a compact solution is needed that combines regulation with essential system monitoring functions. The fixed 2 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the 700 mA current limit and the 38 V maximum input rating to ensure adequate headroom for the target application's electrical requirements.

Part Context

This part belongs to the LT3689 family of synchronous buck regulators designed for applications demanding integrated protection and monitoring. The series is characterized by its ability to operate efficiently across a broad input voltage spectrum while maintaining low standby power consumption, making it suitable for space-constrained designs.

Replacement Considerations

Consult official substitution guides for equivalent parts within the LT3689 series or other Analog Devices regulators with similar pinouts and electrical characteristics.