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LT8705IFE

Name: LT8705IFE
Rating: 4.7 (12 reviews)

IC REG BUCK

製造商
製造商。部分 #LT8705IFE
包 38-TFSOP (0.173, 4.40mm Width) 31 Leads, Exposed Pad
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規格

Supplier	Analog Devices Inc.
Package	Tube
ProductStatus	Obsolete
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-TFSOP (0.173, 4.40mm Width) 31 Leads, Exposed Pad

概述

Description

LT8705IFE is a wide-input DC-DC controller from Analog Devices (formerly Linear Technology). It is used to implement non-isolated buck, boost, or buck-boost converters using external power MOSFETs and an inductor.
Key points:
- Type: PWM, peak-current mode DC-DC controller for external-FET topologies.
- Topologies: Buck, boost, and buck-boost configurations; suitable for automotive and industrial power supplies.
- Features: Wide input range, adjustable switching frequency, soft-start, enable, and protections (overcurrent/short-circuit, over/under voltage, thermal shutdown).
- Packaging: IFE denotes a specific package option.
- Use case: High-efficiency power conversion with external FETs for regulated outputs from varying inputs.
For exact specifications (input range, frequency, current limits, pinout, and recommended circuits), consult the LT8705 data sheet.

Package

LT8705IFE comes in a 32‑pin QFN package with exposed pad (5x5 mm).

Pinout

- Pin count: 28 pins (28-pin package, e.g., TSSOP/QFN).
- Function: LT8705IFE is a wide-input buck-boost controller that drives external MOSFETs to regulate a DC output from a wide input range, using PWM/current-mode control with protections suitable for automotive/industrial DC-DC conversion.

Manufacturer

Analog Devices, Inc. (ADI) manufactures the LT8705IFE. The LT series originated with Linear Technology, which was acquired by Analog Devices in 2017.
Analog Devices is a multinational American semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits for industrial, automotive, communications, consumer, and other markets.

Application

Typical application areas: automotive wide-input DC‑DC power supplies (handling transients/high voltage), battery-powered systems (Li‑ion/LiFePO4 charging/discharging), solar/battery MPPT interfaces, isolated and non‑isolated dc–dc converters, telecom/datacom front‑end supplies, industrial control power, and LED lighting drivers (constant current).

Equivalent

LT8705IFE is a high‑voltage buck‑boost controller. There isn’t a direct pin‑for‑pin cross. Comparable parts from other vendors include:
- TI UCC28950 (buck‑boost controller with external FETs)
- TI LM5170/LM5172 family
- Onsemi NCP buck‑boost controllers
- ST/Monolithic Power Systems buck‑boost alternatives
For an exact substitute, use the vendor cross-reference tool and match input voltage, output, current, and package.