LT3694EFE#PBF

Overview

The LT3694EFE#PBF is a monolithic switching voltage regulator manufactured by Analog Devices Inc., housed in a 20-TSSOP-EP package. It integrates one synchronous buck converter and two low-dropout (LDO) regulators, providing three total outputs. The device supports an input voltage range of 4 V to 36 V with overvoltage protection up to 70 V. The buck converter delivers up to 2.6 A output current with an adjustable output voltage from 750 mV to 16 V. Operating frequencies are selectable between 250 kHz and 2.5 MHz. The component functions within a temperature range of -40 °C to +125 °C and features a shutdown mode with a typical quiescent current of 1 mA.

Feature Summary

• Integrates a high-current synchronous buck regulator with dual LDOs for combined power management
• Provides robust overvoltage protection allowing circuit survival during input transients up to 70 V
• Offers flexible switching frequency selection to optimize efficiency and external component size
• Features low standby current consumption via dedicated shutdown control

Applications

• Industrial systems requiring isolated or multi-rail power distribution
• Automotive electronics operating within standard vehicle electrical architectures
• Distributed power supply architectures in communication equipment
• Battery-powered devices requiring efficient step-down conversion and linear regulation

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pin compatibility and functional variations. Ensure the procurement channel provides genuine components with traceable manufacturing dates. Cross-reference the package marking with the datasheet to prevent counterfeit substitution. Confirm that the supplier adheres to anti-counterfeiting protocols required for automotive or industrial grade parts.

Selection Notes

Select this component when a single IC solution is needed for both high-current switching and precision linear regulation. The wide input range suits applications with variable source voltages. Consider the thermal performance of the TSSOP-EP package for high-load scenarios. Evaluate the need for the integrated LDOs versus discrete alternatives based on noise sensitivity requirements.

Part Context

This part belongs to the LT3694 family of mixed-signal power management ICs. It complements other buck regulators by adding integrated linear capabilities. The series is designed for space-constrained designs where multiple voltage rails are necessary. It shares architectural similarities with other monolithic regulators but distinguishes itself through the inclusion of dual LDOs alongside the main switching stage.

Replacement Considerations

LT3694EUFD-1#PBF offers identical functionality in a QFN-28 package. LT3694EFE-1#PBF includes additional internal programming options compared to the base model. Verify pin-to-pin compatibility before substituting, as package differences may require PCB layout adjustments.