LTC3785EUF#PBF

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LTC3785EUF#PBF

IC REG CTRLR BUCK-BOOST 24QFN

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Specifications

Supplier Analog Devices Inc.
Package Tube
ProductStatus Active
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

Overview

Description

The LTC3785EUF#PBF is Linear Technology/Analog Devices’ Pb-free, EUF-packaged version of the LTC3785 wide-input DC-DC controller. It is an external-FET buck-boost controller intended to regulate a wide input voltage (roughly 4.5–60V) to a stable output using external N-channel MOSFETs. Key features include current-mode control, programmable output voltage via a resistor divider, soft-start, enable/shutdown, and protections (overcurrent, undervoltage, overtemperature). It supports buck, boost, and buck-boost configurations and uses a switching frequency in the hundreds of kHz range. Target applications include automotive and industrial power supplies, and battery-powered systems needing a versatile, high-voltage regulator. The #PBF suffix denotes Pb-free packaging, and EUF identifies the specific package variant. For exact electrical specs, limitations, and reference designs, consult the LTC3785 datasheet and product page.

Features

Key features of LTC3785EUF#PBF:
- Wide input range up to ~60V suitable for automotive/industrial use
- Buck-Boost DC-DC controller using a single inductor
- External N‑channel MOSFETs for high efficiency (supports synchronous rectification)
- Fixed/programmable switching frequency with constant‑frequency PWM, current‑mode control
- Programmable soft-start; enable input
- Adjustable output voltage via feedback network; overvoltage protection
- Overcurrent/short‑circuit protection; thermal (overtemperature) shutdown
- Undervoltage lockout and power‑good/status outputs
- Fault indication and latch behavior; external compensation for stability
- Suitable for high‑reliability applications with lead‑free (PBF) EUF package
Notes: It’s a buck‑boost controller intended to regulate an output from a wide input range using external FETs and an external feedback network.

Package

LTC3785EUF#PBF uses a 16‑pin plastic TSSOP (Pb-free) package.

Pinout

- Pin count: 28 pins
- Function: High‑voltage, dual‑phase synchronous DC‑DC controller (buck/boost/buck‑boost topology) with integrated MOSFET drive circuitry for multi‑phase regulation.

Manufacturer

- Manufacturer: Linear Technology, a brand now part of Analog Devices, Inc. (ADI) after ADI’s acquisition of Linear Technology in 2017.
- Company type: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and high-performance power-management ICs (e.g., switching regulators, data converters, amplifiers).

Application

LTC3785EUF#PBF is a high-efficiency buck-boost DC-DC controller. Typical application areas include:
- Automotive power supplies and ECUs
- Battery-powered portable devices and backup power
- Solar/battery charging and energy-harvesting systems
- Point-of-load regulators in telecom, servers, and networking gear
- Industrial equipment needing high-efficiency buck/boost regulation from a wide input range

Equivalent

There isn’t an exact drop-in equivalent for LTC3785EUF#PBF. Closest cross-references are buck‑boost controllers from other vendors with similar HV input and current specs, such as TI LM5170/LM5171 and Analog Devices ADP2370/ADP2371. Check pinout and features carefully (internal FETs, switching frequency, packaging). For a precise cross-reference, use distributor cross-reference tools (Digi-Key/Mouser) with the LTC3785’s key specs.

Shipping

Shipping MethodsWe

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Shipping Fee Reference (DHL/FedEx):

DHL: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 2-5 business days.

FedEx: Shipping cost ranges from $25-$40 (0.5kg), with an estimated delivery time of 3-7 business days.

UPS: Shipping cost ranges from $25-$45 (0.5kg), with an estimated delivery time of 3-7 business days.

TNT: Shipping cost ranges from $25-$65 (0.5kg), with an estimated delivery time of 3-7 business days.

EMS: Shipping cost ranges from $30-$50 (0.5kg), with an estimated delivery time of 7-15 business days.

Registered Air Mail: Shipping cost is $2-$4 (0.1kg), with an estimated delivery time of 5-20 business days.

Payments

Payment Methods

The Payment term is 100% Prepaid.

Currently, we only accept the below payment methods:

1. PayPal

2. Credit/ Debit Card

3. Wire Transfer

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