LT8711IUDC

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

SKU:fd1e3955ca31 Category: DC DC Switching Controllers Brand: Analog Devices Inc.

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Product introduction

Product Detailed Parameters

Description：IC REG BUCK
Series：-
Mfr：Analog Devices Inc.
Package：Tube
Output Type：PWM
Function：Step-Up, Step-Down
Output Configuration：Positive
Topology：Buck, Boost, Buck-Boost, SEPIC
Number of Outputs：1
Output Phases：-
Voltage - Supply (Vcc/Vdd)：4.5V ~ 42V
Frequency - Switching：100kHz ~ 750kHz
Duty Cycle (Max)：100%
Synchronous Rectifier：No
Clock Sync：Yes
Serial Interfaces：-
Control Features：Enable, Frequency Control, Soft Start
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：20-WFQFN Exposed Pad
Supplier Device Package：20-QFN (3x4)

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LT8711IUDC

Overview

The LT8711IUDC is a micropower synchronous multitopology controller from Analog Devices Inc., designed for flexible DC-DC conversion. It supports buck, boost, SEPIC, ZETA, and non-synchronous buck-boost configurations. The device operates with a supply voltage range of 4.5V to 42V and features an adjustable switching frequency between 100kHz and 750kHz. It utilizes current-mode PWM control with a maximum duty cycle of 100%. The component is housed in a 20-WFQFN exposed pad package (3x4mm) and is rated for operation within a temperature range of -40°C to 125°C.

Feature Summary

Supports multiple converter topologies including synchronous buck, boost, SEPIC, ZETA, and asynchronous buck-boost.
Features dual gate drive voltage inputs to optimize gate driver efficiency across varying input conditions.
Integrates current-mode PWM control with clock synchronization capability for multi-phase or parallel applications.
Includes comprehensive control characteristics such as enable pin, frequency control, and soft-start functionality.

Applications

Industrial power supplies requiring flexible topology configuration
Battery-powered systems utilizing boost or buck-boost architectures
Telecommunications equipment needing wide input voltage ranges
Automotive electronics operating under harsh thermal conditions

Procurement Notes

Verify the specific suffix variant required, as LT8711IUDC may be obsolete; check for equivalents like LT8711IUDC#PBF. Confirm package integrity upon receipt, as QFN components are sensitive to moisture and physical damage. Ensure storage conditions meet JED standards to prevent lead oxidation before soldering. Validate supplier authenticity through authorized distribution channels to avoid counterfeit parts.

Selection Notes

Select this controller when system design demands topology flexibility without changing core control ICs. Consider the 42V input limit and ensure external MOSFETs match the voltage and current requirements. Evaluate thermal performance given the small QFN footprint and high-frequency operation. Verify that the desired switching frequency falls within the 100kHz to 750kHz range for optimal efficiency and component sizing.

Part Context

The LT8711 belongs to Analog Devices' family of micropower synchronous multitopology controllers. It replaces older fixed-topology solutions by offering configurable buck, boost, and SEPIC capabilities in a single package. This integration reduces bill-of-materials count and simplifies design iterations for engineers developing versatile power management systems.