LT8609SIV#PBF

Overview

The LT8609SIV#PBF is a synchronous step-down switching regulator from Analog Devices, featuring a 42V maximum input voltage and 3A peak output current capability. It operates within an input range of 3V to 42V, delivering a fixed 5V output at up to 2A continuous current. The device utilizes a Silent Switcher2 architecture for low EMI and supports switching frequencies from 200kHz to 2.2MHz. It includes shutdown functionality and operates over a temperature range of -40°C to +125°C in a 16-lead LQFN package.

Feature Summary

• Silent Switcher2 architecture minimizes electromagnetic interference through internal capacitor placement and ground plane design.
• Wide 3V to 42V input range accommodates various supply sources including automotive batteries.
• Integrated synchronous rectification ensures high efficiency across load conditions.
• Shutdown pin allows for precise power management and system control.

Applications

• Automotive battery-powered systems
• Industrial point-of-load regulation
• Distributed power supplies
• High-efficiency DC-to-DC conversion

Procurement Notes

Verify the specific suffix IV against the official datasheet to confirm the fixed 5V output configuration and LQFN-16 package type. Ensure compatibility with required thermal dissipation standards for the operating environment. Confirm RoHS compliance status as per the latest manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component when a wide input voltage range up to 42V is required alongside compact size and low EMI performance. The fixed 5V output simplifies design for standard logic levels. Consider the 2A continuous current limit and thermal requirements of the LQFN-16 package for PCB layout optimization.

Part Context

This part belongs to the LT8609 family of synchronous buck regulators designed for applications demanding small solution size and low radiated emissions. The series integrates features optimized for industrial and automotive environments where reliability and electromagnetic compatibility are critical constraints.

Replacement Considerations

LT8609AJDDM-5#PBF offers similar electrical characteristics but uses a DFN-10 package instead of LQFN-16. Verify pinout compatibility and thermal performance differences when substituting.

FAQ

What is the fixed output voltage of the LT8609SIV#PBF?

The LT8609SIV#PBF provides a fixed 5V output voltage.

Does the LT8609SIV#PBF support adjustable output voltages?

No, the IV suffix indicates a fixed 5V output version; other variants in the series may offer adjustable outputs.