LT3840EUFE#PBF

$9.69

Description：IC REG CTRLR BUCK 38QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube

SKU:8c0c5512ee1f Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG CTRLR BUCK 38QFN
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Output Type：Transistor Driver
Function：Step-Down
Output Configuration：Positive or Negative
Topology：Buck
Number of Outputs：1
Output Phases：1
Voltage - Supply (Vcc/Vdd)：2.5V ~ 60V
Frequency - Switching：50kHz ~ 1MHz
Duty Cycle (Max)：99%
Synchronous Rectifier：Yes
Clock Sync：Yes
Serial Interfaces：-
Control Features：Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：38-WFQFN Exposed Pad
Supplier Device Package：38-QFN (4x6)
Grade：-
Qualification：-

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LT3840EUFE#PBF

Overview

The LT3840EUFE#PBF is a high voltage synchronous step-down switching regulator controller from Analog Devices Inc. It operates from a 2.5V to 60V supply with a quiescent current of 6 uA and a shutdown operating current of 20 uA. The device supports a 1 MHz switching frequency and delivers up to 20 A output current. It features a single output adjustable from 1.25 V to 60 V. The component functions in Buck and Inverting topologies, operating within a temperature range of -40°C to +125°C. It is housed in a 38-QFN (4x6) package.

Feature Summary

Integrates an internal buck-boost switching regulator to generate a 7.5V bias supply for MOSFET gate drive and IC power, enabling higher efficiency operation across the input voltage range.

Applications

Industrial power supplies
Telecommunications systems
Point-of-load regulation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance and RoHS standards as per manufacturer documentation. Confirm the QFN-38 package dimensions and thermal pad requirements against your PCB layout specifications. Ensure the development kit DC1909A is available if prototype evaluation is required. Cross-reference the exact part number with official distributor catalogs to confirm availability status and shipping restrictions in your region.

Selection Notes

Select this controller for applications requiring wide input voltage ranges up to 60V and precise current limiting. The low quiescent current makes it suitable for battery-powered or energy-efficient designs. Consider the 1 MHz switching frequency for smaller external passive components. Verify that the external MOSFETs selected can handle the 20 A output current and the voltage stresses associated with the 60V maximum input.

Part Context

The LT3840EUFE#PBF belongs to the LT3840 series of high voltage synchronous step-down controllers. It is designed for demanding industrial and telecom environments where wide input ranges and high efficiency are critical. The device complements other PMIC solutions by providing robust control logic for external power stages.