LT3689HMSE-5#PBF

Overview

The LT3689HMSE-5#PBF is a monolithic step-down switching regulator manufactured by Analog Devices Inc., housed in a 16-lead MSOP package. It delivers a fixed 5 V output with a maximum current of 700 mA. The device operates from an input voltage range of 3.4 V to 38 V, featuring a low quiescent current of 50 uA and a fixed 2 MHz switching frequency. It integrates power-on reset and watchdog timer functions for system protection. The component supports operation across an extended temperature range from -40°C to +150°C.

Feature Summary

• Integrates power-on reset generator and watchdog timer for enhanced system reliability
• Fixed 2 MHz switching frequency enables the use of compact external components
• Supports high input voltages up to 38 V for versatile power supply applications

Applications

• Industrial control systems requiring robust power management
• Automotive electronics operating within wide voltage ranges
• Embedded systems needing integrated fault protection mechanisms

Procurement Notes

Verify the specific suffix #PBF indicates tube packaging when sourcing through distributors. Confirm that the HMSE variant corresponds to the extended temperature grade required for your application environment. Cross-reference the manufacturer datasheet to ensure compatibility with your board layout and thermal requirements before finalizing procurement orders.

Selection Notes

Select this part when a fixed 5 V output is required alongside integrated system monitoring features. The high input voltage capability suits applications powered by automotive or industrial buses. Consider the MSOP package size constraints and thermal dissipation needs associated with the 700 mA output current in dense PCB layouts.

Part Context

This component belongs to the LT3689 family of high-voltage buck regulators. It shares architectural similarities with other parts in the series but differs in output configuration and packaging options. The LMSE and HMSE designations typically denote variations in temperature rating and package type within the product line.

FAQ

Does the LT3689HMSE-5#PBF include shutdown functionality?

Yes, the datasheet specifications indicate that this specific part number includes a shutdown pin for controlling power consumption.

What is the maximum operating temperature for this component?

The LT3689HMSE-5#PBF is rated for an extended temperature range, supporting operation up to +150°C.