LT8640IUDCF#PBF

$12.61

Description：IC REG BUCK ADJ 5A 20QFN
Series：Silent Switcher®1
Mfr：Analog Devices Inc.
Package：Tube

SKU:6c73c153ec7f 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 5A 20QFN
Series：Silent Switcher®1
Mfr：Analog Devices Inc.
Package：Tube
Function：Step-Down
Output Configuration：Positive
Topology：Buck
Output Type：Adjustable
Number of Outputs：1
Voltage - Input (Min)：3.4V
Voltage - Input (Max)：42V
Voltage - Output (Min/Fixed)：0.97V
Voltage - Output (Max)：42V
Current - Output：5A
Frequency - Switching：210kHz ~ 2MHz
Synchronous Rectifier：Yes
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount, Wettable Flank
Package / Case：20-WFQFN, 18 Leads, Exposed Pad
Supplier Device Package：20-QFN (3x4)
Grade：-
Qualification：-

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LT8640IUDCF#PBF

Overview

The LT8640IUDCF#PBF is a synchronous step-down Silent Switcher 2 regulator from Analog Devices, housed in a 20-WFQFN package with exposed pad. It supports an input voltage range of 3.4 V to 42 V and delivers up to 5 A output current. The adjustable output voltage spans from 970 mV to 41.9 V. Operating frequencies are programmable between 200 kHz and 3 MHz. Quiescent current is specified at 1.7 µA. The device operates within a junction temperature range of -40°C to +125°C.

Feature Summary

Integrates Silent Switcher 2 technology for minimized radiated electromagnetic interference without external shielding
Features synchronous rectification architecture for high conversion efficiency across load ranges
Includes internal compensation and soft-start circuitry to simplify design implementation

Applications

Industrial automation power distribution systems
Automotive infotainment and sensor node supplies
Telecommunications base station equipment
Point-of-load regulation for embedded processors

Procurement Notes

Verify the specific suffix 'CF' against official Analog Devices documentation to confirm component configuration details. Ensure compatibility with required thermal management solutions given the QFN-18 package constraints. Confirm that the 1.7 µA quiescent current specification aligns with system standby requirements. Validate that the 42 V maximum input rating exceeds peak line conditions in the target application environment.

Selection Notes

Select this component when designing compact power stages requiring low electromagnetic emissions and wide input voltage flexibility. The integrated Silent Switcher 2 architecture reduces board space by eliminating external snubbers or shields. Consider the 20-QFN package for applications prioritizing thermal performance and small footprint over through-hole mounting options.

Part Context

This part belongs to the LT8640 family of high-efficiency synchronous buck converters. It shares architectural similarities with other Silent Switcher devices but offers specific pinout and thermal characteristics defined by the WFQFN-18 package. The series targets applications demanding robust performance in electrically noisy environments.