LT8705AEUHF#PBF

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LT8705AEUHF#PBF

IC REG CTRLR BUCK-BOOST 38QFN

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規格

Supplier Analog Devices Inc.
Package Tube
ProductStatus Active
OutputType Transistor Driver
Function Step-Up/Step-Down
OutputConfiguration Positive
Topology Buck-Boost
NumberofOutputs 2
OutputPhases 2
Voltage-Supply(Vcc/Vdd) 2.8V ~ 80V
Frequency-Switching 100kHz ~ 400kHz
SynchronousRectifier Yes
ClockSync Yes
ControlFeatures Enable, Frequency Control, Soft Start
OperatingTemperature -40°C ~ 125°C
MountingType Surface Mount
Package/Case 38-WFQFN Exposed Pad

概述

Description

LT8705AEUHF#PBF is the lead-free, RoHS‑compliant variant of Analog Devices’ LT8705 DC‑DC controller. It’s a wide-input, single‑chip controller designed for buck, boost, and buck‑boost converter topologies using external MOSFETs.
Key points:
- Wide input, high‑efficiency DC‑DC controller for automotive/industrial power supplies
- Supports buck, boost, and buck‑boost configurations
- Fixed‑frequency, current‑mode control with soft‑start
- Includes protection features: overcurrent, over/undervoltage, thermal shutdown, and fault reporting
- Requires external power MOSFETs and inductor
- Package code AEUHF; PBF denotes RoHS-compliant, lead-free variant
用途: automotive/industrial DC‑DC power conversion where a controller IC, external FETs, and passive components achieve efficient regulation across a wide input range.

Features

LT8705AEUHF#PBF features (concise):
- Wide input range suitable for automotive/battery systems (up to high-voltage Vin).
- Buck-boost controller capable of regulating output when Vin is above or below Vout.
- Current-mode PWM control with cycle-by-cycle current limit.
- Programmable switching frequency for efficiency and component sizing.
- Soft-start and adjustable output regulation for smooth startup.
- Protections: overcurrent/short-circuit, overvoltage, undervoltage lockout, and thermal shutdown.
- Enable input and status/diagnostic signaling options.
- Pb-free (PBF) package variant available; suitable for industrial/automotive environments.
- Typical applications: automotive power rails, battery-powered systems requiring buck/boost regulation.
Note: Exact specs (e.g., Vin range, freq range, protection details) vary by variant and package. This summary reflects common LT8705 features; refer to the datasheet for precise figures.

Package

The LT8705AEUHF#PBF is in a Pb-free 16‑lead QFN package (4x4 mm) with exposed pad.

Pinout

- Pin count: 28 pins (QFN package, EUHF variant).
- Function: High-voltage synchronous buck/boost DC–DC controller (with integrated MOSFETs) for wide-input DC-DC conversion, using current-mode control with enable/feedback and related protection features.

Manufacturer

Analog Devices, Inc. (ADI), which owns Linear Technology. ADI is an American multinational semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits for automotive, industrial, communications, and consumer markets.

Application

Applications for LT8705AEUHF#PBF include:
- Automotive DC-DC converters (wide input range, high efficiency)
- Industrial power supplies and motor drives
- Battery-powered systems requiring buck/boost regulation
- Solar charging and energy-harvesting front ends
- LED lighting drivers and auxiliary rails
- USB adapters and portable power solutions
- General wide-input DC-DC designs needing buck-boost operation.

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