LTC3888

RECOMMENDED FOR NEW DESIGNS

Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management

Data Sheet (Rev. D) Product Selection Table
Part Models
4
1ku List Price
Starting From $6.70
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Part Details

  • 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
LTC3888
Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
LTC3888/LTC3888-1/LTC3888-2 Application Circuit LTC3888/LTC3888-1/LTC3888-2 Performance Graph LTC3888 Pin Configuration LTC3888-1 Pin Confiruration LTC3888-2 Pin Confiruration LTC3888/LTC3888-1/LTC3888-2 Pin Configuration LTC3888_LTC3888-1_LTC3888-2 Functional Block Diagram
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Documentation

Data Sheet 1

User Guide 2

Application Note 7

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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3888
  • LTC3888-1

LTpowerPlay®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

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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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
DC2888A-A/
DC2888A-B

Evaluating the LTC3888/LTC3888-1, 8-Phase, Single Output Synchronous Buck Converter with Power System Management

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Features and Benefits

  • Input voltage range: 7 V to 14 V
  • Output voltage VOUT Max output current: 400 A
  • Number of phases: 8
  • Current sense
  • Temperature monitor
  • PM bus compliant with digital power system management

Product Details

Demonstration circuit DC2888A-A/DC2888A-B is an 8-phase single- output, high efficiency, high density, synchronous buck converter with 7 V to 14 V input range. The output can supply up to 400 A maximum load current. The demo board showcases one LTC3888/LTC3888-1 working with eight LTC7051. The LTC3888/ LTC3888-1 is a PMBus-compliant dual loop 8-phase step-down DC/DC controller with digital power system management. LTC7051 is an integrated smart power stage with current sense and temperature monitor. Refer to the LTC3888/LTC3888-1 and LTC7051 data sheets for detailed information.

DC2888A-A/DC2888A-B powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay ™ on your PC and use Analog Devices' I2C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows to reconfigure the part on the fly and store the configuration in electrically erasable programmable read-only memory (EEPROM), and view the telemetry of voltage, current, temperature, and fault status.

eval board
schematic 4
schematic 5
schematic 6
DC2652A-A

LTC3888 | 8-Phase, Dual-Output Synchronous Buck Converter with Power System Management

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Product Details

Demonstration circuit 2652A-A is an 8-phase dual-output, high efficiency, high density, synchronous buck converter with 7V to 14V input range. Each output can supply up to 120A maximum load current with 1V output. The demo board showcases the LTC3888, which is a PMBus-compliant dual loop 8-phase step-down DC/DC controller with digital power system management. The LTC3888 is designed to work with DrMOS devices that provide an output current sense and temperature monitor. Please refer to LTC3888’s data sheet for more detailed information.

DC2652A-A powers up to default settings and produces power based on configuration resistors (or with the setting in its non-volatile memory) without the need for any serial bus communication. This allows easy evaluation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay™ onto your PC and use ADI’s I2C/SMBus/PMBus dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status.

GUI Download
The software can be downloaded from: LTpowerPlay
For more details and instructions of LTpowerPlay, please refer to “LTpowerPlay Quick Start Procedure” in the demo manual.
DC2888A-A/
DC2888A-B
Evaluating the LTC3888/LTC3888-1, 8-Phase, Single Output Synchronous Buck Converter with Power System Management
DC2888A-A Evaluation Board Angle DC2888A-A Evaluation Board Top DC2888A-A Evaluation Board Bottom
DC2652A-A
LTC3888 | 8-Phase, Dual-Output Synchronous Buck Converter with Power System Management
DC2652A-A Evaluation Board DC2652A-A Evaluation Board - Top View DC2652A-A Evaluation Board - Bottom View

Latest Discussions

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RE: LTM4650A & LTC2971 application issue
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RE: LTC3888 in LTpowerCAD
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