LTC3891EUDC#TRPBF

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LTC3891EUDC#TRPBF

IC REG CTRLR BUCK 20QFN

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Specifications

Part Status Active
Output Type Transistor Driver
Function Step-Down
Output Configuration Positive
Topology Buck
Number of Outputs 1
Output Phases 1
Voltage - Supply (Vcc/Vdd) 4V ~ 60V
Frequency - Switching 105kHz ~ 835kHz, 350kHz ~ 535kHz
Duty Cycle (Max) 99%
Synchronous Rectifier Yes
Clock Sync No
Control Features Current Limit, Enable, Frequency Control, Power Good, Soft Start, Tracking
Operating Temperature -40°C ~ 125°C (TJ)
Mounting Type Surface Mount
Package / Case 20-WFQFN Exposed Pad
Supplier Device Package 20-QFN (3x4)
Base Product Number LTC3891

Overview

Description

The LTC3891EUDC#TRPBF is a high-performance, synchronous step-down DC/DC controller from Analog Devices (formerly Linear Technology). It is designed for high-efficiency power conversion in a variety of applications, including telecommunications and industrial systems.
Key features include:
- Wide Input Voltage Range: Typically operates from 4.5V to 60V, making it suitable for various power sources.
- Synchronous Operation: Ensures high efficiency by using both high-side and low-side MOSFETs.
- Adjustable Output Voltage: The output voltage can be set from 0.8V to 60V, providing flexibility for different applications.
- High Switching Frequency: Up to 750 kHz, allowing for smaller inductors and capacitors, which can reduce the overall footprint.
- Current Mode Control: Ensures stable operation and simplifies compensation.
- Integrated Features: Includes soft-start, overvoltage protection, and fault protection capabilities.
This device is ideal for designs requiring high efficiency and reliability in compact spaces.

Features

The LTC3891EUDC#TRPBF is a high-performance synchronous step-down regulator designed for high-efficiency power management applications. Key features include:
1. Wide Input Voltage Range: Operates from 4V to 60V, making it suitable for various applications.
2. Output Voltage Range: Adjustable output voltage from 0.8V to 15V.
3. High Efficiency: Capable of achieving efficiencies exceeding 95% under typical load conditions.
4. Current Mode Control: Provides fast transient response and ease of compensation.
5. Integrated MOSFETs: Reduces external component count and PCB area.
6. PWM and PFM Operation: Allows for versatility in operating modes to optimize efficiency.
7. Soft-Start Feature: Prevents inrush current during startup.
8. Power Good Output: Monitors output voltage and indicates when it's within the desired range.
9. Thermal Protection: Includes thermal shutdown to prevent overheating.
10. Compact Package: Available in a 20-lead 4mm × 5mm LQFN package, suitable for space-constrained applications.
These features make the LTC3891EUDC#TRPBF ideal for industrial, automotive, and telecommunications applications.

Package

The LTC3891EUDC#TRPBF is packaged in a 28-lead TSSOP (Thin Shrink Small Outline Package) with a thermal pad for improved heat dissipation.

Pinout

The LTC3891EUDC#TRPBF is a dual-phase, synchronous step-down DC/DC controller. It features a 28-pin TSSOP package.
The key functions include:
1. PWM Control: Implements a constant frequency, current mode PWM control.
2. Voltage Reference: Provides a stable 0.8V reference for output voltage.
3. Compensation: Built-in compensation for stability and transient response.
4. Phase Control: Supports interleaved operation for improved efficiency and output ripple.
5. Current Sense: Monitors inductor current for current limiting and control.
6. Power Good: Indicates when the output voltage is within the specified range.
7. Soft-Start: Manages the startup behavior to limit inrush current.
8. Frequency Setting: External resistor sets the switching frequency.
9. Synchronization: Allows synchronization with an external clock.
This device is suitable for high-efficiency power management in various applications.

Manufacturer

The manufacturer of the LTC3891EUDC#TRPBF is Analog Devices, Inc. Analog Devices is a multinational semiconductor company known for its high-performance analog, mixed-signal, and digital signal processing (DSP) integrated circuits. The company specializes in a variety of applications, including industrial automation, automotive systems, consumer electronics, and communications. Founded in 1965, Analog Devices is recognized for its innovation in signal processing and its commitment to providing advanced technology solutions. The LTC3891 is a specific model in their product line that serves as a step-down voltage regulator, widely used in power management applications.

Application

The LTC3891EUDC#TRPBF is a high-performance, synchronous step-down DC-DC controller used in various applications, including point-of-load (POL) regulation, power management in telecommunications, industrial systems, and automotive electronics. It is suitable for driving high power requirements in servers, networking equipment, and FPGA/ASIC power supplies, with features like voltage tracking and current sharing for multi-phase designs.

Equivalent

The LTC3891EUDC#TRPBF is a high-performance DC-DC controller. Equivalent products include the TPS40210 from Texas Instruments, the LM5118 from Texas Instruments, and the MAX5974 from Maxim Integrated. These alternatives may have similar functionalities, but always check datasheets for specific requirements and features.

Shipping

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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

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