LT3694EUFD#TRPBF

Overview

The LT3694EUFD#TRPBF is a monolithic switching regulator featuring one buck converter and two low-dropout linear regulators, housed in a 28-lead QFN package. It accepts input voltages from 4V to 36V and provides an adjustable output voltage range of 750mV to 16V with a maximum output current of 2.6A for the switching regulator. The device supports programmable switching frequencies between 250kHz and 2.5MHz, operates within a temperature range of -40°C to +125°C, and draws a typical quiescent current of 1mA.

Feature Summary

• Integrates a high-efficiency synchronous buck converter alongside two independent LDOs within a single compact package.
• Features a wide input voltage operating range suitable for various power supply architectures.
• Includes internal soft-start circuitry to limit inrush current during startup.
• Offers flexible frequency synchronization capabilities to minimize system noise.

Applications

• Industrial control systems requiring multiple regulated voltage rails
• Automotive electronics applications
• Telecommunications infrastructure equipment
• Portable instrumentation devices

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pin compatibility and functional equivalence. Ensure the requested part matches the exact package type and thermal characteristics required by your design. Cross-reference datasheet revisions to validate performance parameters before finalizing procurement decisions.

Selection Notes

Select this component when a combined solution for switching regulation and low-noise linear regulation is necessary. Evaluate the thermal requirements of the QFN-28 package relative to the expected load conditions. Confirm that the desired switching frequency aligns with external component availability and electromagnetic interference constraints.

Part Context

This part belongs to the LT3694 family of mixed-signal power management ICs designed for space-constrained applications. It consolidates power conversion functions typically requiring separate discrete components into a unified integrated circuit, simplifying board layout and reducing overall system footprint.

Replacement Considerations

LT3694EUFD#PBF is a tube-packaged equivalent with identical electrical specifications. LT3694IUFD#PBF represents the industrial temperature grade variant. Verify packaging format differences and ensure thermal performance meets application requirements when substituting.

FAQ

What is the function of the #TRPBF suffix?

The #TRPBF suffix indicates that the component is supplied in a tape and reel packaging format, which is optimized for automated surface-mount assembly processes.

How does the device handle overcurrent protection?

The integrated buck converter utilizes cycle-by-cycle current limiting to protect against short circuits and overload conditions on the output.