Alternative Parts

  • LTC3880
    LTC3880

    Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

  • LTC3882-1
    LTC3882-1

    Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Overview

Features and Benefits

  • PMBus/I2C Compliant Serial Interface
    • Monitor Voltage, Current, Temperature and Faults
    • Digitally Programmable Voltage, Current Limit, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV Thresholds
  • 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT ≤ 5.25V
  • ±0.5% Output Voltage Accuracy
  • Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with Fault Logging and ECC
  • IC Supply Range: 3V to 13.2V
  • Resistor or Inductor DCR Current Sensing
  • Optional Resistor Programming for Key Parameters
  • 40-Pin (6mm × 6mm) QFN Package

Product Details

The LTC3882 is a dual, PolyPhase DC/DC synchronous step-down switching regulator controller with PMBus compliant serial interface. It uses a constant frequency, leading-edge modulation, voltage mode architecture for excellent transient response and output regulation. Each PWM channel can produce output voltages from 0.5V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. Up to four LTC3882s can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.

LTC3882 system configuration and monitoring is supported by the LTpowerPlay software tool. The device’s serial interface can be used to read back input voltage, output voltage, and current, temperature and fault status. A wide range of operating parameters can be set via the digital interface or stored in internal EEPROM for use at power up. Switching frequency and phase, output voltage and device address can also be programmed using external configuration resistors.

PWM Enable Output TG/BG Control HW Write Protect Dedicated PGOOD Differential Vout Sense
LTC3882 Yes Yes Yes No  VOUT0 Only
LTC3882-1  No No No Yes VOUT0 & VOUT1

Applications

  • High Current Distributed Power Systems
  • Servers, Network and Storage Equipment
  • Intelligent Energy Efficient Power Regulation
  • Industrial/Telecom/ATE Systems

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (5)

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LTC3882
LTC3882-1

LTpowerCAD

LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTPowerCAD

Design tools for the following parts are available in LTpowerCAD:

LTC3882
LTC3882 Parallel
ltc3882Parallel

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits.

Linduino

Product Recommendations

LTC3882 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTC3882 Discussions

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Price Table Help

 

Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.