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LTC3785EUF

Name: LTC3785EUF
Rating: 4.7 (12 reviews)

IC POWER MANAGEMENT

製造商
製造商。部分 #LTC3785EUF
包 24-WFQFN 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	1
Voltage-Supply(Vcc/Vdd)	2.7V ~ 10V
Frequency-Switching	100kHz ~ 1MHz
DutyCycle(Max)	99%
SynchronousRectifier	Yes
ClockSync	No
ControlFeatures	Current Limit, Enable, Soft Start
OperatingTemperature	-40°C ~ 85°C (TA)
MountingType	Surface Mount
Package/Case	24-WFQFN Exposed Pad

概述

Description

The LTC3785EUF is a high‑voltage buck/boost switching regulator controller from Linear Technology (now Analog Devices). It can regulate a stable output from a wide input by bucking, boosting, or buck‑boosting as needed, making it suitable for automotive and other fluctuating input applications. The “EUF” suffix denotes a specific compact 16‑pin package variant used in surface‑mount designs. The device is a controller (not a power MOSFET) that drives external N‑channel MOSFETs and an inductor to implement the converter. Key features typically include current‑mode control, programmable switching frequency, soft‑start, overcurrent protection, overvoltage/undervoltage protection, and thermal shutdown. It requires external power MOSFETs and passive components per the datasheet. For exact electrical specs, recommended external components, efficiency, and layout guidelines, consult the LTC3785EUF datasheet.

Features

Key features of LTC3785EUF (buck-boost controller)
- Wide input range up to 60 V and buck/boost operation (uses external MOSFETs for high/low-side drive)
- Gate-drive outputs for high-efficiency switching (synchronous-style capability)
- Programmable output via feedback network; supports buck, boost, and buck-boost topologies
- Current-mode control with cycle-by-cycle current limiting and slope compensation
- Programmable switching frequency (via resistor) in the hundreds of kHz range
- Robust protections: UVLO, overvoltage protection, overcurrent/short-circuit protection, and thermal shutdown
- Soft-start and an output disconnect in shutdown to limit inrush
- Enable/shutdown input and PGOOD/status flag
- suitable for automotive/industrial use with wide operating temp and RoHS compliant
- Compact EUF package
Note: This is a concise feature summary; for exact electrical specs and pinout, refer to the LTC3785EUF datasheet.

Package

LTC3785EUF comes in a 28-pin HTSSOP (TSSOP-28) package.

Pinout

- Pin count: 28 pins (LTC3785EUF in a 28‑lead package, e.g., TSSOP/QFN).
- Function: High‑voltage dual synchronous buck‑boost DC‑DC controller and gate driver (controls two switching regulators for wide‑input power conversion, with current limit and soft‑start features).

Manufacturer

Manufacturer: Analog Devices, Inc. (ADI). The LTC3785EUF originally came from Linear Technology; Linear Technology was acquired by Analog Devices in 2017, so ADI is the current maker.
About the company: Analog Devices is a multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing ICs, including power-management and DC-DC converter products.

Application

LTC3785EUF is used in wide-input DC-DC power stages such as:
- Automotive and industrial power supplies (wide input range)
- Buck and buck-boost regulators
- Battery-powered equipment and UPS systems
- Telecom/network and data-communication rails
- Energy-management modules (solar, storage)
High efficiency and good transient response make it suitable for systems needing stable outputs across fluctuating inputs.