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  2. Power Monitor, Control, and Protection
  3. Digital Power System Management
  4. Buck Regulators with Digital Power System Management
  5. LTC3888-2

Data Sheet Rev. C
JP Rev. 0

Overview

Features and Benefits

  • PMBus/I2C Compliant Serial Interface
    • Monitor Voltage, Current, Temperature and Faults
    • Digitally Program VOUT, Margins, UV, OV, Current Limit, Soft-Start/Stop and Sequencing
  • Expandable to >16 Phases
  • 4.5V ≤ VIN ≤ 26.5V, 0.3V ≤ VOUT ≤ 3.45V
  • ±0.5% Output Voltage Accuracy
  • Programmable PWM Loop Compensation
  • Accurate PolyPhase® Current Sharing
  • Internal EEPROM with ECC and Fault Logging
  • DrMOS Output Current Monitor Interface
  • DrMOS Temperature/Fault Bus Interface
  • DrMOS Gate Drive Supply Monitor
  • Load Step Emulation
  • Internal or External PWM Clock from 250kHz to 1MHz
  • 52-Pin (5mm × 8mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Product Details

The LTC3888/LTC3888-1/LTC3888-2 is a PMBus-compliant dual loop DC/DC synchronous step-down switching regulator controller with eight expandable phases supporting a wide range of master/slave configurations. The controller uses constant frequency current mode architecture to provide excellent transient response and output regulation. Each PWM master is capable of producing output voltages from 0.3V to 3.45V with multiple phase configurations using DrMOS devices that provide an output current monitor.

PMBus configuration and monitoring is supported by LTpowerPlay™ software. Programmable loop compensation and built-in load step emulation facilitate setting bandwidth based on input voltage and output load capacitance. PMBus commands allow read back of input voltage, output voltage and current, and operating status. Operating parameters can be set via PMBus command or stored in internal EEPROM for use at power up. Switching frequency, phase configuration, output voltage (LTC3888/LTC3888-2), output current limit (LTC3888-1) and device address can also be set using external programming resistors.

APPLICATIONS

  • High Current Distributed Power Systems
  • Servers, Network and Storage Equipment

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Product Lifecycle icon-recommended Pre-Release

This product is new and engineering validation may still be underway. Quantities may be limited and design specifications may change while we ready the product for release to production.

Documentation & Resources

  • View All (8)
  • Data Sheets (1)
  • Application Notes (7)
    • Document Type
    Application Notes

    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:

    LTC3888
    LTC3888-1

    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.View our quality and reliability program and certifications for more information.

    Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
    LTC3888IUHG-2#PBF Material Declaration Reliability Data 52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)
    LTC3888IUHG-2#TRPBF Material Declaration Reliability Data 52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)
    LTC3888IUHG-2#WPBF Material Declaration Reliability Data 52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)
    LTC3888IUHG-2#WTRPBF Material Declaration Reliability Data 52-Lead QFN (5mm x 8mm x 0.75mm w/ EP)
    Wafer Fabrication Data

    Support & Discussions

    LTC3888-2 Contact ADI Technical Support »
    LTC3888-2 Ask your question »
    LTC3888-2 Contact ADI Technical Support » LTC3888-2 Ask your question »

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