LT1940LEFE#TRPBF

Overview

The LT1940LEFE#TRPBF is a dual monolithic step-down switching regulator manufactured by Analog Devices Inc. It integrates two independent buck converters within a single package, each capable of delivering up to 1.4A of output current. The device operates with a fixed switching frequency of 1.1MHz and accepts an input voltage range from 3.6V to 25V. It features adjustable output voltages starting from 1.25V. The component is housed in a TSSOP-EP-16 surface-mount package and is rated for operation between -40°C and +85°C ambient temperature.

Feature Summary

• Dual integrated buck converter topology providing independent power rails
• High-frequency 1.1MHz switching operation for compact passive component sizing
• Internal power switches rated for 1.4A continuous output per channel
• Wide input voltage compatibility supporting standard bus voltages

Applications

• Portable electronics requiring multiple regulated supply rails
• Industrial control systems needing isolated or separate logic and analog power
• Embedded computing platforms utilizing low-voltage microprocessors
• Telecommunications equipment requiring efficient DC-DC conversion

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm the LE variant specifications against the official Analog Devices datasheet to ensure compatibility with your design requirements. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability. Check for any recent product change notices that may affect pinout or electrical characteristics before finalizing procurement.

Selection Notes

Select this component when space-constrained designs require two independent buck regulators. The 1.1MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Ensure the thermal management strategy supports the TSSOP-EP-16 package dissipation capabilities at maximum load conditions. Verify that the required output voltage range falls within the adjustable limits supported by the external feedback network configuration.

Part Context

This part belongs to the LT1940 family of dual synchronous buck converters. It serves as a power management solution for applications demanding high efficiency and small footprint. The device replaces discrete solutions by integrating control loops, drivers, and power switches into a single IC. It is designed for use in systems where board real estate is limited but multiple voltage domains are necessary.

Replacement Considerations

LT1940EFE#TRPBF is a documented substitute offering identical electrical performance with tube packaging instead of tape-and-reel.