LTC3728LXCUH#TRPBF

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LTC3728LXCUH#TRPBF

IC REG CTRLR BUCK 32QFN

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規格

Supplier Analog Devices Inc.
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
OutputType Transistor Driver
Function Step-Down
OutputConfiguration Positive
Topology Buck
NumberofOutputs 2
OutputPhases 2
Voltage-Supply(Vcc/Vdd) 4.5V ~ 28V
Frequency-Switching 260kHz ~ 550kHz
DutyCycle(Max) 99.4%
SynchronousRectifier Yes
ClockSync No
ControlFeatures Enable, Power Good, Soft Start
OperatingTemperature 0°C ~ 85°C (TA)
MountingType Surface Mount
Package/Case 32-WFQFN Exposed Pad

概述

Description

LTC3728LXCUH#TRPBF is a Linear Technology (now Analog Devices) dual-channel, multiphase buck regulator controller. It is used to build high-current DC-DC converters (VRMs) by driving external MOSFETs in interleaved or synchronized phases for CPU/GPU-type supplies and other high-power rails.
Key points:
- Two PWM/current-mode controllers with suitable interleaving and a common oscillator.
- Programmable switching frequency, soft-start, and voltage feedback for adjustable Vout.
- Remote sense, current limit, overvoltage/undervoltage protection, and thermal protection.
- Requires external N-channel MOSFETs, inductors, input/output capacitors.
Packaging/ordering:
- LXCUH denotes the specific package variant.
- #TRPBF indicates Pb-free, Tape-and-Resume (Tape-and-Reel) packaging.
For exact specifications, application circuits, and design guidelines, consult the LTC3728 datasheet and product pages on Analog Devices’ website.

Features

Here are typical features of the LTC3728LXCUH#TRPBF (datasheet-dependent, for VRM/multi-phase buck use):
- Dual/multi-phase synchronous buck controller for high-efficiency VRMs
- Wide input voltage range suitable for from low to high Vin applications
- Programmable switching frequency with external synchronization for interleaved phases
- Slope-compensated, current-mode control with cycle-by-cycle current limit
- High-side/low-side gate-drive capability for synchronous rectification
- Soft-start and output-voltage tracking; remote sense option
- UVLO, OVP, OCP protections with latchable fault conditions
- Thermal shutdown protection
- Enable input and Power-Good status output
- Suitable for interleaved/multiphase operation to spread current
- RoHS-compliant packaging; LXCUH package; TRPBF tape-and-reel
Note: Exact features (pinout, max Vin, phase count, and timing) vary by revision/package; consult the latest datasheet for precise specifications.

Package

QFN package: 16-lead (4x4 mm) with an exposed pad. Pb-free, Tape & Reel (TRPBF) variant.

Pinout

- Pin count: 28 pins
- Function: Dual synchronous buck regulator controller/driver (two-channel DC-DC switching regulator controller with gate-drive outputs for external MOSFETs).

Manufacturer

- Manufacturer: Analog Devices, Inc. (ADI) — owner of Linear Technology, the original designer of the LTC3728.
- What kind of company: A multinational semiconductor company that designs and manufactures analog, mixed-signal, and power-management integrated circuits for industrial, automotive, communications, and consumer electronics.

Application

Multi-output high-efficiency DC-DC power supplies and VRMs. Applications include CPU/GPU core voltage regulation and other multi-rail workloads, such as server/data-center power delivery, telecom/networking equipment, industrial power systems, automotive power management, and battery-powered equipment requiring multiple rails.

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