LT3640IFE

Description：IC REG BUCK ADJ DL 28TSSOP
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:8329f46db2e5 Category: Voltage Regulators - DC DC Switching Regulators Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK ADJ DL 28TSSOP
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：2
Voltage - Input (Min)：2.5V
Voltage - Input (Max)：35V
Voltage - Output (Min/Fixed)：0.6V, 1.265V
Voltage - Output (Max)：33.97V
Current - Output：1.1A, 1.3A
Frequency - Switching：500kHz ~ 2MHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Supplier Device Package：28-TSSOP-EP
Grade：-
Qualification：-

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LT3640IFE

Overview

The LT3640IFE is a dual monolithic buck regulator featuring integrated power-on reset and watchdog timer functions. It operates with an input voltage range of 4 V to 35 V, delivering up to 1.3 A output current per channel. The device utilizes a fixed 2.5 MHz switching frequency and maintains a typical quiescent current of 275 uA. It is housed in a TSSOP-EP-28 package and supports operation temperatures from -40°C to +125°C.

Feature Summary

Integrates two synchronous buck converters with independent control loops
Includes built-in power-on reset generator and programmable watchdog timer for system reliability
Features Silent Switcher architecture to minimize electromagnetic interference emissions

Applications

Industrial automation controllers requiring dual isolated power rails
Telecommunications infrastructure equipment
Embedded systems with strict EMI sensitivity requirements

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm pinout compatibility and thermal performance characteristics. Ensure the procurement source provides valid RoHS compliance certificates. Cross-reference the manufacturer part number with authorized distributor lists to avoid counterfeit components. Confirm that the package type matches the intended PCB footprint design specifications.

Selection Notes

Select this component when dual low-noise buck conversion is required within a compact form factor. The integrated reset and watchdog features reduce external component count compared to discrete solutions. Consider the 2.5 MHz frequency for balancing efficiency and passive component size. Evaluate thermal dissipation requirements based on the TSSOP-EP-28 package capabilities under maximum load conditions.

Part Context

This device belongs to the LT3640 family of dual synchronous step-down regulators. It shares architectural similarities with other Silent Switcher products but distinguishes itself through the inclusion of system management features like the watchdog timer. The family targets applications demanding high reliability and low noise in space-constrained environments.