LT3508IFE#TRPBF

Overview

The LT3508IFE#TRPBF is a dual-output synchronous step-down switching regulator manufactured by Analog Devices Inc. It operates with an input voltage range of 3.7 V to 36 V and provides two adjustable output channels, each capable of delivering up to 1.4 A. The device utilizes a fixed internal switching frequency of 2.5 MHz to minimize external component size while maintaining high efficiency. Integrated features include programmable soft-start, current limit protection, and a shutdown pin for power management. It is housed in a 16-lead TSSOP package with an exposed thermal pad, suitable for surface-mount applications operating between -40°C and +125°C.

Feature Summary

• Dual independent adjustable output channels with integrated synchronous rectification
• Fixed 2.5 MHz switching frequency for compact passive component selection
• Integrated current limit and thermal protection mechanisms
• Programmable soft-start capability to control inrush current

Applications

• Portable equipment requiring multiple regulated voltage rails
• Industrial control systems with wide input voltage ranges
• Embedded computing platforms needing efficient DC-DC conversion
• Battery-powered devices utilizing lithium-ion or lithium-polymer sources

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when ordering. Confirm that the I-grade temperature rating aligns with industrial operational requirements. Cross-reference the manufacturer datasheet for latest mechanical drawings and recommended soldering profiles to ensure compatibility with assembly processes. Check for any recent product change notices regarding material composition or manufacturing site updates.

Selection Notes

Select this component when a dual-output buck converter is required from a wide input voltage source. The 2.5 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure the PCB layout supports the thermal performance of the exposed pad design. Verify that the load requirements for both channels do not exceed the 1.4 A per channel limit under all operating conditions.

Part Context

This part belongs to the LT3508 family of dual synchronous buck regulators. It shares architectural similarities with other high-voltage step-down converters but is distinct in its dual-channel configuration and fixed high-frequency operation. The IFE variant specifically denotes the industrial temperature range and TSSOP-EP package type, differentiating it from other package options within the same functional series.

Replacement Considerations

LT3508IUF#PBF: Offers identical electrical specifications but utilizes a QFN-24 package instead of TSSOP-16. Requires footprint modification during replacement.