LTC3886
LTC3886-1
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3886
LTC3886-1

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

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 8
1ku List Price Starting From $7.54
Features
  • 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, Frequency, and Control Loop Compensation
  • Output Error Less Than ±0.5% Over Temperature
  • Integrated 16-Bit ADC and 12-Bit DAC
  • Integrated High Side Current Sense Amplifier
  • Internal EEPROM with ECC and Fault Logging
  • Integrated N-Channel MOSFET Gate Drivers
  • Power Conversion
    • Wide VIN Range: 4.5V to 60V
    • VOUT0, VOUT1 Range: 0.5V to 13.8V
    • Analog Current Mode Control
    • Accurate PolyPhase® Current Sharing for Up to 6 Phases (100kHz to 750kHz)
    • Available in a 52-Lead (7mm × 8mm) QFN Package
    Additional Details
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    The LTC3886/LTC3886-1 is a dual PolyPhase DC/DC synchronous step-down switching regulator controller with I2C-based PMBus compliant serial interface. This controller employs a constant-frequency, current-mode architecture, with high voltage input and output capability along with programmable loop compensation. The LTC3886 is supported by the LTpowerPlay® software development tool with graphical user interface (GUI).

    The EXTVCC pin supports voltages up to 14V allowing for optimized circuit efficiency and die temperature, and for the controller output to supply the chip power. Switching frequency, output voltage, and device address can be programmed both by digital interface as well as external configuration resistors. Parameters can be set via the digital interface or stored in EEPROM. Both outputs have an independent power good indicator and FAULT function.

    The LTC3886 can be configured for discontinuous (pulse-skipping) mode or continuous inductor current mode. The LTC3886-1 also includes a sequencing off feature to discharge very large output capacitors.

    APPLICATIONS

    • Telecom, Datacom, and Storage Systems
    • Industrial and Point of Load Applications
    Part Models 8
    1ku List Price Starting From $7.54

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    Documentation

    Documentation

    Video

    Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
    LTC3886EUKG#PBF
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    Software & Part Ecosystem

    Software & Part Ecosystem

    Evaluation Kit

    Evaluation Kits 4

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    DC2277A

    LTC3886 UKG Package Clamshell Programming Demo Board

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    DC2277A

    LTC3886 UKG Package Clamshell Programming Demo Board

    LTC3886 UKG Package Clamshell Programming Demo Board

    Product Detail

    Demonstration circuit 2277A contains the circuitry needed to program and verify the EEPROM of the LTC3886 in the UKG package and that is its only purpose. The DC2277A is shipped with a LTC3886 installed in the clamshell style programming socket and its EEPROM contains the factory default configuration. The LTpowerPlay #.proj file that corresponds to the factory default can be found in the GUI.

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    DC2155A-A

    LTC3886UKG Demo Board (RSENSE) Dual Phase Dual Output PMBus Buck 18V≤VIN≤54V, VOUT0/VOUT1=5V to 12V at 12A per channel, 150kHz

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    DC2155A-A

    LTC3886UKG Demo Board (RSENSE) Dual Phase Dual Output PMBus Buck 18V≤VIN≤54V, VOUT0/VOUT1=5V to 12V at 12A per channel, 150kHz

    LTC3886UKG Demo Board (RSENSE) Dual Phase Dual Output PMBus Buck 18V≤VIN≤54V, VOUT0/VOUT1=5V to 12V at 12A per channel, 150kHz

    Product Detail

    Demonstration circuit 2155A is available in two configurations. The DC2155A-A is a dual output synchronous step-down converter featuring the LTC3886, a dual-phase current mode controller. The DC2155A-B is a single output synchronous step-down converter that operates with four phases: two from the LTC3886 and two from LTC3870, a phase extender. Both versions have a PMBus interface and digital power system management functions.
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    DC2155A-B

    LTC3886UKG/LTC3870UFD Demo Board (RSENSE) | 4 Phase Single Output PMBus Buck 18V≤VIN ≤54V, VOUT=12V at 48A, 150kHz

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    DC2155A-B

    LTC3886UKG/LTC3870UFD Demo Board (RSENSE) | 4 Phase Single Output PMBus Buck 18V≤VIN ≤54V, VOUT=12V at 48A, 150kHz

    LTC3886UKG/LTC3870UFD Demo Board (RSENSE) | 4 Phase Single Output PMBus Buck 18V≤VIN ≤54V, VOUT=12V at 48A, 150kHz

    Product Detail

    Demonstration circuit 2155A is available in two configurations. The DC2155A-A is a dual output synchronous step-down converter featuring the LTC3886, a dual-phase current mode controller. The DC2155A-B is a single output synchronous step-down converter that operates with four phases: two from the LTC3886 and two from LTC3870, a phase extender. Both versions have a PMBus interface and digital power system management functions.

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    DC2578A

    Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]

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    DC2578A

    Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]

    Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]

    Product Detail

    The DC2578A is a complete power chain, including a hot swap controller, an intermediate bus controller, and six point-of-load channels with power system management. The board demonstrates how to safely transfer power from a backplane, through an LTC4281 hot swap controller, through an LTC3886 step-down intermediate bus controller (IBC), and out through the point-of-load converters (POLs) that regulate load voltages. It shows the comprehensive set of power management, cooperation, and safety features of the Analog Devices solution, and showcases how easy it is to configure and manage the whole power hierarchy. Each regulated supply has the ability to sequence, trim, margin, supervise, measure, respond cooperatively to faults, and log fault information in nonvolatile memory. In addition, the onboard load pulser helps with optimizing the adjustable LTC3886 control loop response. The rich set of status and telemetry information provided by the entire system is consolidated and presented under one GUI interface — LTpowerPlay.

    Tools & Simulations

    Tools & Simulations 3

    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.

    To launch ready-to-run LTspice demonstration circuits for this part:

    Step 1: Download and install LTspice on your computer.

    Step 2: Click on the link in the section below to download a demonstration circuit.

    Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

    Linduino

    Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

    Linduino code repository on GitHub and instructions on how to use the code.

    Purchase Linduino

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