Data Sheet Rev. C
JP Rev. B
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Alternative Parts

LTC3880
LTC3880

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

LTC3882
LTC3882

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
    • Program Voltage, Soft-Start/Stop, Sequencing, Margining, AVP and UV/OV/OC Limits
  • 3V ≤ VINSNS ≤ 38V, 0.5V ≤ VOUT ≤ 5.25V
  • ±0.5% Output Voltage Error
  • Programmable PWM Frequency or External Clock Synchronization from 250kHz to 1.25MHz (2.5MHz-2)
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with Fault Logging and ECC
  • IC Supply Range: 3V to 13.2V
  • Resistor or Inductor DCR Current Sensing
  • Power Good Output Voltage Monitor
  • Optional Resistor Programming for Key Parameters
  • 40-Pin (6mm × 6mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3882-1/LTC3882-2 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 0.1V to 5.25V using a wide range of 3.3V compatible power stages, including power blocks, DrMOS or discrete FET drivers. Up to four LTC3882-1 devices can operate in parallel for 2-, 3-, 4-, 6- or 8-phase operation.

System configuration and monitoring is supported by the LTpowerPlay™ software tool. The LTC3882-1/LTC3882-2 serial interface can read back input voltage, output voltage and current, temperature and fault status. Most 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 set using external configuration resistors.

PWM Enable Output TG/BG Control HW Write Protect Dedicated PGOOD Differential VOUT Sense Max PWM Frequency
LTC3882 Yes Yes Yes No VOUT0 Only 1.25MHz
LTC3882-1 No No No Yes VOUT0 & VOUT1 1.25MHz
LTC3882-2 No No No Yes VOUT0 & VOUT1 2.5MHz

APPLICATIONS

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

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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 (3)

Documentation & Resources

  • View All (13)
  • Data Sheets (1)
  • Reliability Data (1)
  • Application Notes (6)
  • User Guides (2)
  • Spec Notice (1)
  • Product Selector Card (1)
  • Solutions Bulletins & Brochures (1)
    • Document Type

    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.

    LTPowerCAD

    Design tools for the following parts are available in LTpowerCAD:

    LTC3882

    Product Recommendations

    LTC3882-1 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.

    LTC3882-1
    LTC3882-2 Material Declaration
    Quality And Reliability
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    Support & Discussions

    LTC3882-1 Contact ADI Technical Support »
    LTC3882-1 Ask your question »
    LTC3882-1 Contact ADI Technical Support » LTC3882-1 Ask your question »

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