LT8640HUDC-1#PBF

$12.30

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

SKU:02d3fc14908b 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 ~ 150°C (TJ)
Mounting Type：Surface Mount
Package / Case：20-WFQFN, 18 Leads, Exposed Pad
Supplier Device Package：20-QFN (3x4)
Grade：-
Qualification：-

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LT8640HUDC-1#PBF

Overview

The LT8640HUDC-1#PBF is a synchronous step-down Silent Switcher regulator from Analog Devices. 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 41.58 V. Operating frequencies range from 200 kHz to 3 MHz. The device features a QFN-18 package, operates within a junction temperature range of -40°C to +150°C, and includes shutdown functionality with a quiescent current of 300 uA.

Feature Summary

Integrates Silent Switcher technology to minimize electromagnetic interference (EMI) radiation without requiring external filters.
Provides high efficiency across wide input voltage ranges through synchronous rectification.
Supports flexible design configurations via programmable switching frequency and adjustable output voltage.

Applications

Industrial automation control systems
Distributed power supply architectures
Telecommunications infrastructure equipment

Procurement Notes

Verify the specific suffix and marking code against official Analog Devices documentation to ensure compatibility with required thermal and electrical specifications. Confirm package integrity upon receipt, as surface-mount components are sensitive to physical damage during handling. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before integration into production designs.

Selection Notes

Select this component for applications requiring compact size and low EMI in high-voltage buck converter scenarios. Ensure the PCB layout accommodates the QFN-18 footprint and thermal pad requirements for optimal heat dissipation at full load. Evaluate the operating temperature range against environmental conditions to confirm suitability for industrial or automotive-grade deployments where extended thermal performance is critical.

Part Context

This part belongs to the LT8640 family of Silent Switcher regulators, designed for high-efficiency power conversion. It represents a specialized variant optimized for specific thermal and packaging constraints within the broader portfolio of Analog Devices power management solutions. The series emphasizes noise reduction and space-saving form factors for modern electronic systems.