LT8609IMSE#PBF

Overview

The LT8609IMSE#PBF is a synchronous step-down switching regulator from Analog Devices, housed in a 10-lead MSOP package with an exposed thermal pad. It supports an input voltage range of 3V to 42V and delivers up to 2A of continuous output current. The device features a fixed 2MHz switching frequency and adjustable output voltages starting from 0.782V. It consumes only 1.7µA of non-switching quiescent current and operates within a junction temperature range of -40°C to 125°C.

Feature Summary

• Integrates high-speed synchronous rectification for efficient power conversion across wide input ranges.
• Maintains ultra-low quiescent current during non-switching operation to extend battery life in standby modes.
• Utilizes internal compensation with peak current mode topology to ensure stability with small external components.

Applications

• Industrial distributed power bus architectures
• Automotive infotainment and sensor systems
• Portable instrumentation requiring low standby current

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and temperature grade. Ensure the ordering part number matches the required tape-and-reel or tube configuration. Cross-reference the manufacturer's latest datasheet revision to validate pinout compatibility and electrical specifications before integration into production designs.

Selection Notes

Select this component when a compact solution is needed for 42V automotive or industrial inputs. The fixed 2MHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the exposed pad for thermal management requirements and verify that the 2A continuous current rating meets the maximum load demands of the target application circuit.

Part Context

This part belongs to the LT8609 family of micropower synchronous buck regulators designed for space-constrained applications. It shares architectural similarities with the LT8608 but offers higher current capability. The MSOP-EP package provides a balance between board density and thermal performance suitable for dense PCB layouts.

Replacement Considerations

LT8609EMSE#PBF: Identical electrical specifications with commercial temperature grade instead of industrial grade.

FAQ

What is the minimum output voltage supported by the LT8609IMSE#PBF?

The device supports adjustable output voltages down to 0.782V.

How does the LT8609 handle undervoltage lockout?

The EN/UV pin features an accurate 1V threshold that can be used to program input undervoltage lockout conditions.