LT3640IFE#TRPBF

Overview

The LT3640IFE#TRPBF is a dual monolithic buck regulator from Analog Devices, housed in a TSSOP-EP-28 package. It operates with an input voltage range of 4 V to 35 V and delivers up to 1.3 A output current per channel. The device features a fixed switching frequency of 2.5 MHz and includes integrated power-on reset and watchdog timer functions. Operating temperatures span from -40°C to +125°C, with a quiescent current of 275 µA.

Feature Summary

• Dual synchronous buck converters providing independent regulated outputs
• Integrated power-on reset generator and programmable watchdog timer for system protection
• Fixed high-frequency operation enabling the use of compact external components

Applications

• Portable equipment requiring multiple supply rails
• Industrial control systems needing reliable power sequencing
• Embedded computing platforms utilizing reset monitoring

Procurement Notes

Verify the specific suffix against official documentation to confirm tape-and-reel packaging and temperature grade. Ensure compatibility with required thermal management solutions for the exposed pad. Confirm that the selected variant meets all regulatory compliance standards for the intended deployment environment.

Selection Notes

Select this component when dual isolated or non-isolated buck conversion is required within a single package. The integrated reset and watchdog features reduce external component count compared to standard regulators. Evaluate thermal performance requirements given the high switching frequency and dual-channel current capability.

Part Context

This part belongs to the LT3640 series of dual step-down converters. It shares functional similarities with other dual regulators but distinguishes itself through the inclusion of built-in system supervision logic. The series targets applications demanding space efficiency and enhanced reliability without additional discrete monitoring circuits.

FAQ

Does the LT3640IFE#TRPBF include overcurrent protection?

Yes, the device incorporates cycle-by-cycle current limiting for both channels to protect against short circuits and overload conditions.

What is the purpose of the exposed pad on the TSSOP-EP-28 package?

The exposed pad provides a low-resistance thermal path to dissipate heat and serves as an electrical ground connection for improved performance.