LT3694EUFD-1#TRPBF

Overview

The LT3694EUFD-1#TRPBF is a monolithic switching regulator featuring one buck converter and two low-dropout linear regulators. It operates with an input voltage range of 4V to 36V. The buck output provides up to 2.6A at voltages from 750mV to 16V. Switching frequency ranges from 250kHz to 2.5MHz. Quiescent current is 1mA. Operating temperature spans -40°C to +125°C. Package is QFN-28.

Feature Summary

• Integrates a high-current buck converter with dual LDOs for multi-rail power distribution
• Supports wide input voltage range suitable for industrial and automotive bus architectures
• Features adjustable switching frequency to optimize efficiency and filter size
• Includes thermal regulation and shutdown control for robust operation

Applications

• Industrial equipment power management
• Automotive electronics subsystems
• Embedded systems requiring multiple regulated rails
• Telecommunications infrastructure power supplies

Procurement Notes

Verify the suffix #TRPBF indicates tape-and-reel packaging, distinct from tube-packaged variants like #PBF. Confirm the EUFD package designation matches the required QFN-28 footprint. Ensure the -1 variant specification aligns with the intended pinout or feature set. Cross-reference the manufacturer's latest datasheet for any updates on RoHS compliance or material declarations prior to finalizing procurement orders.

Selection Notes

Select this component when a single IC solution is needed for three distinct output rails. The integrated buck handles higher current loads while LDOs provide clean power for sensitive analog sections. Consider the 2.6A buck limit and input voltage ceiling of 36V. Evaluate thermal performance in the QFN-28 package against ambient conditions. Compare against standalone controllers if higher currents or different topologies are required.

Part Context

This part belongs to the LT3694 family of mixed-mode power management ICs. It combines switching and linear regulation technologies to simplify board design. The device targets applications needing compact solutions with minimal external components. Analog Devices designs this series for reliability in demanding environments. It serves as an alternative to discrete regulator combinations.

FAQ

What is the maximum output current for the buck converter?

The buck converter supports a maximum output current of 2.6A.

Does the device support synchronous rectification?

Yes, the internal buck converter utilizes synchronous rectification for improved efficiency.

How is the switching frequency controlled?

The switching frequency is programmable via an external resistor, ranging from 250kHz to 2.5MHz.