LT8609AJMSE16#TRPBF

Overview

The LT8609AJMSE16#TRPBF is a synchronous step-down switching regulator from Analog Devices, housed in a 16-lead MSOP package. It operates with an input voltage range of 3 V to 42 V and delivers a continuous output current of 3 A. The device features a fixed switching frequency of 2 MHz and supports adjustable output voltages. Key electrical specifications include a quiescent current of 1 µA and a shutdown capability. It functions within a junction temperature range of -40°C to +150°C.

Feature Summary

• Integrates high-side and low-side N-channel power MOSFETs for efficient synchronous rectification.
• Features Burst Mode operation to maintain high efficiency at light loads while minimizing output voltage ripple.
• Includes internal compensation and peak current mode control for stable performance with small external components.

Applications

• Industrial automation systems requiring compact power solutions
• Automotive electronics operating within wide input voltage ranges
• Portable equipment powered by single-cell lithium-ion batteries

Procurement Notes

Verify the specific suffix '16' against official documentation to confirm pinout and package dimensions, as variations exist within the family. Confirm RoHS compliance status through the manufacturer's material declaration. Ensure availability aligns with current supply chain constraints, as distribution channels may report limited stock or restricted sales regions for this specific part number.

Selection Notes

Select this component when a 3 A output current is required alongside a wide 42 V input range. The fixed 2 MHz switching frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the 1 µA quiescent current for battery-powered applications requiring extended standby life. Verify thermal management requirements given the high junction temperature rating and power dissipation characteristics.

Part Context

This part belongs to the LT8609 family of high-efficiency, high-speed synchronous buck regulators. The AJ grade indicates specific performance parameters distinct from other variants like the AH or AM grades. The MSOP-16 package provides a compact footprint suitable for space-constrained designs while maintaining robust thermal performance through the exposed pad.

Replacement Considerations

LT8609AHMSE16#TRPBF: Similar topology but different electrical characteristics; verify current ratings and quiescent current differences before substitution.

FAQ

Does the LT8609AJMSE16#TRPBF support synchronization to an external clock?

Yes, the device includes a SYNC pin that allows synchronization to an external clock signal or selection of Burst Mode operation.

What is the minimum input voltage for this regulator?

The minimum operating input voltage is 3 V, allowing it to function effectively with single-cell lithium-ion battery sources.