LTC3884/-1

Dual Output PolyPhase Step-Down Controller with Sub-Milliohm DCR Sensing and Digital Power System Management

Data Sheet
Rev. F
icon-recommended Recommended for New Designs
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Datasheet
Data Sheet Rev. F
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Alternative Parts

LTC3883 </br>LTC3883-1
LTC3883
LTC3883-1

Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3886 <br>LTC3886-1
LTC3886
LTC3886-1

60V Dual Output Step-Down Controller with Digital Power System Management

Overview

Features and Benefits

  • PMBus/I2C Compliant Serial Interface
    • Telemetry Read-Back Includes VIN, IIN, VOUT, IOUT, Temperature and Faults
    • Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV/OC
  • Sub-Milliohm DCR Current Sensing
  • Digitally Adjustable Loop Compensation Parameters
  • ±0.5% Output Voltage Accuracy Over Temperature
  • Integrated Input Current Sense Amplifier
  • Internal EEPROM with ECC and Fault Logging
  • Integrated N-Channel MOSFET Gate Drivers

Power Conversion

  • Wide VIN Range: 4.5V to 38V
  • VOUT Range: 0.5V to 3.5V (with Low DCR Setting); 0.5V to 5.5V (without Low DCR Setting)
  • Accurate PolyPhase® Current Sharing for Up to 6 Phases
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3884/LTC3884-1 are dual output PolyPhase DC/DC synchronous step-down switching regulator controllers with an I2C-based PMBus compliant serial interface. The controllers employ a constant-frequency current mode architecture, together with a unique scheme to provide excellent performance for sub-milliohm DCR applications. The LTC3884/LTC3884-1 are supported by the LTpowerPlay® software development tool with graphical user interface (GUI).

Programmable loop compensation allows the controller to be compensated digitally. Switching frequency, channel phasing, output voltage, and device address can be programmed both by the digital interface as well as external configuration resistors. Additionally, parameters can be set via the digital interface or stored in EEPROM. Both outputs have independent power good indicators and FAULT function.

The LTC3884-1 has all the features that the LTC3884 has except the LTC3884 includes MOSFET gate drivers while the LTC3884-1 does not.

Applications

  • Telecom, Datacom, and Storage Systems
  • Industrial and Point-of-Load Applications
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Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (5)

Documentation

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 downloads and documentation
LTspice

Models for the following parts are available in LTspice:

LTC3884

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 download and documentation
LTPowerCAD

LTpowerCAD Project Files

LTC3884 Project - High Current, 4-Phase Buck Converter with Ultra-Low DCR Current Sensing and PMBus (7-14V to 1V @ 160A)
LTC3884 Project - High Efficiency, Dual Output Buck Converter with Ultra-Low DCR Current Sensing and PMBus (4.5-14V to Dual 1V @ 30A)
LTC3884 & LTC3874 Project - PolyPhase Digital PSM Step-Down with Ultra-Low DCR Sensing Plus Two Slave Controllers (10-14V to 1V @ 240A)

Design tools for the following parts are available in LTpowerCAD:

LTC3884
LTC3884 PARALLEL
LTC3884+LTC3874 PARALLEL
LTC3884+LTC3874PARALLEL
LTC3884PARALLEL

Product Recommendations

LTC3884 Companion Parts

Recommended Related Parts

Reference Materials

Product Selector Card (1)

Digital Power System Management

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.

LTC3884/-1 Material Declaration
Quality And Reliability
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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.


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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.