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

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.

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.

Sample & Buy

Sample & Buy functionality exists in desktop site
Back
Check Inventory

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.

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.


Price Table Help