LTC3887
LTC3887-1
LTC3887-2

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. F) Product Selection Table
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Overview

  • PMBus/I2C Compliant Serial Interface
    • Telemetry Read Back includes VIN, IIN, VOUT, IOUT, Temperature, Duty Cycle and Faults
    • Programmable Voltage, Current Limit, Digital Soft-Start/Stop, Sequencing, Margining, OV/UV and Frequency Synchronization (250kHz to 1MHz)
  • ±0.5% Output Voltage Accuracy Over Temperature
  • Integrated 16-Bit ADC
  • VOUT Range: 0.5V to 5.5V (VOUT0, VOUT1)
  • Internal EEPROM and Fault Logging with ECC
  • Integrated N-Channel MOSFET Gate Drivers (LTC3887)
  • Minimum On-Time 45ns
  • Wide VIN Range: 4.5V to 24V
  • Analog Current Mode Control Loop
  • Remote Differential Sense for PolyPhase® Applications
  • Accurate PolyPhase Current Sharing for Up to Six Phases
  • Available in a 40-Pin (6mm × 6mm) QFN Package
  • AEC-Q100 Qualified for Automotive Applications
LTC3887
LTC3887-1
LTC3887-2
Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management
LTC3887-3887-1-3887-2 Application Circuit LTC3887-3887-1-3887-2 Pin Configuration LTC3887-3887-1-3887-2 Pin Configuration1 LTC3887-3887-1-3887-2 Performance Graph
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Documentation

Data Sheet 1

User Guide 5

Application Note 9

Technical Articles 1

Informational 1

Product Information 1

Spec Notice 1

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
Switching Regulators & Controllers 1
LTC3870-1
RECOMMENDED FOR NEW DESIGNS PolyPhase Step-Down Slave Controller for Digital Power System Management
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3887
  • LTC3887-1

Linduino 3

LTpowerCAD 3

Design tools for the following parts are available in LTpowerCAD:

  • LTC3887

IBIS Model 1

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.

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.

Evaluation Kits

eval board
schematic 1
DC2263A-A

LTC3887EUJ Demo Board (RSENSE) | Dual PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT0/VOUT1 = 0.8V to 1.8V @ 25A

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Product Details

Demonstration circuit 2263A is a high current, high efficiency, dual output/polyphase synchronous buck converter featuring the LTC3887EUJ, a dual-phase current mode controller. The LTC3887 has the PMBus interface and the power system management functions. The DC2263A uses discrete MOSFETs in the power stage. The input range of this board is from 7V to 14V. The output voltage can be programmed from 0.8V to 1.8V (1.0V default) with an output current up to 25A per phase. The DC2263A has two versions: The DC2263A-A uses a sense resistor and provides two outputs while the DC2263A-B uses DCR current sensing and provides a dual-phase single output. 

eval board
schematic 2
DC2263A-B

LTC3887EUJ Demo Board (DCR SENSE) | 2 Phase PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT = 0.8V to 1.8V @ 50A

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Product Details

Demonstration circuit 2263A is a high current, high efficiency, dual output/polyphase synchronous buck converter featuring the LTC3887EUJ, a dual-phase current mode controller. The LTC3887 has the PMBus interface and the power system management functions. The DC2263A uses discrete MOSFETs in the power stage. The input range of this board is from 7V to 14V. The output voltage can be programmed from 0.8V to 1.8V (1.0V default) with an output current up to 25A per phase. The DC2263A has two versions: The DC2263A-A uses a sense resistor and provides two outputs while the DC2263A-B uses DCR current sensing and provides a dual-phase single output.

eval board
schematic 3
DC2394A

LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A

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Product Details

Demonstration circuit 2394A is a high current, high efficiency, dual output PolyPhase® synchronous buck converter featuring the LTC3887EUJ-1, a dual-phase current mode controller. The LTC3887-1 has the PMBus interface and the power system management functions.

eval board
schematic 4
DC2454A

LTC3887EUJ-1/LTC3870EUF-1 Demo Board | Dual Phase PMBus Buck Controller with Slave Controller, 7V ≤ VIN ≤ 14V, 0.8V ≤ VOUT ≤ 1.8V @ 100A

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Product Details

Demonstration circuit 2454A is a high current, high efficiency, poly-phase synchronous buck converter featuring the LTC3887EUJ-1, a dual-phase current mode controller, and the LTC3870EUF-1, a dual-phase slave controller. The LTC3887-1 has the PMBus interface and the power system management functions.


 


eval board
schematic 5
DC1709A

LTC3880/-1 & LTC3887/-1 Demo Board I Programming Clamshell Socketed Demo Board

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Product Details

DC1709A: Demo Board for the LTC3880 Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management.


 


eval board
schematic 6
DC2578A

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

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Product Details

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.

eval board
schematic 7
DC2394A

LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A

Buy Now View Details

Product Details

Demonstration circuit 2394A is a high current, high efficiency, dual output PolyPhase® synchronous buck converter featuring the LTC3887EUJ-1, a dual-phase current mode controller. The LTC3887-1 has the PMBus interface and the power system management functions.
DC2263A-A
LTC3887EUJ Demo Board (RSENSE) | Dual PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT0/VOUT1 = 0.8V to 1.8V @ 25A
DC2263A - Schematic
DC2263A-B
LTC3887EUJ Demo Board (DCR SENSE) | 2 Phase PMBus Buck, 7V ≤ VIN ≤ 18V, VOUT = 0.8V to 1.8V @ 50A
DC2263A - Schematic
DC2394A
LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A
DC2394A - Schematic
DC2454A
LTC3887EUJ-1/LTC3870EUF-1 Demo Board | Dual Phase PMBus Buck Controller with Slave Controller, 7V ≤ VIN ≤ 14V, 0.8V ≤ VOUT ≤ 1.8V @ 100A
DC2454A - Schematic
DC1709A
LTC3880/-1 & LTC3887/-1 Demo Board I Programming Clamshell Socketed Demo Board
DC1709A - Schematic
DC2578A
Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]
DC2578A
DC2394A
LTC3887EUJ-1 Demo Board (DCR Sense) | PMBus Buck with DrMOS, 7V ≤ VIN ≤ 14V, VOUT0/VOUT1 = 0.8V to 1.8V @ 30A
DC2394A - Schematic

Reference Designs

Versal PRIME Circuits from the lab

AI XCXM1902 Minimum Rails and PL Performance

View Detailed Reference Design

Features and Benefits

ADI Key Power Management Features for Versal PRIME XCXM1802 for Minimum Rails / PL Performance

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LT8607 is a compact, high efficiency, high speed 750mA synchronous monolithic.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
Versal PRIME Circuits from the lab

AI XCXM1802 for Optimized Efficiency

View Detailed Reference Design

Features and Benefits

ADI Key Power Management Features for Versal ACAP XCXM1802 for Optimized Efficiency

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
Versal PRIME Circuits from the lab

AI XCXM1802 for Full Management Mid to High Voltage

View Detailed Reference Design

Features and Benefits

ADI Key Power Management Features for Versal ACAP XCXM1802 for Mid to High Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
XCXM1802 Low Voltage
XCXM1802 Low Voltage
XCXM1802 Low Voltage Efficiency
Versal PRIME Circuits from the lab

AI XCXM1802 for Low Voltage

View Detailed Reference Design

Features and Benefits

ADI Key Power Management Features for Versal PRIME XCXM1802 for Low Voltage

  • Proposed Solution implements new LTC3887-1/LTC7051 combo
  • LTC3887-1 is a PMBus 2-phase, 2 loop, current mode controller. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is new Silent Switcher 2 ADI MOS capable of delivering increased DC load while switching at higher frequencies. Increased DC load allows for decreased phase count and higher current density. Increased Fsw allows for increase bandwidth and excellent transient response.
  • LTC3636 is dual 6A, controlled on-time current mode monolithic (integrated FETs). Provides high performance compact solution for auxiliary rails.
  • LTC3644 is a quad 1.25A output, high efficiency synchronous monolithic capable of switching up to 2.25MHz.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
Versal AI Prime XCVC1802 Circuits from the lab

View Detailed Reference Design

Features and Benefits

Versal™ AI Prime series solves a broad range of industry-specific problems with performance and flexibility. Some of these cases include storage acceleration, data center network acceleration, 5G xHaul and Passive optical networks.

Analog Devices, Inc. supports Versal AI power management by offering a full comprehensive solution inclusive of their next generation PM Bus Controller and ADI’s DrMOS. The Versal Demonstration boards support Mid-Voltage and High-Voltage applications without power management. For a complete list power designs and use cases Versal AI Prime please contact your local FAE.

Key Featrues Include

  • LTC3887-1 is a PMBus dual phase, current mode controller with ADI’s DrMOS. PMBus commands allow Vin, Vout, current, temperature, and fault status read back.
  • LTC7051 is a new Silent Switcher 2 ADI’s DrMOS capable of delivering increased DC load while switching at higher frequencies.  Increased DC load allows for decreased phase count and higher current density.  Increased Fsw allows for increase bandwidth and excellent transient response..
  • LTC3636 is a dual 6A, controlled on-time current mode monolithic (integrated FETs).  Provides high performance compact solution for auxiliary rails.
  • LT8607 is a compact, high efficiency, high speed 750mA synchronous monolithic.
  • LTC3634 is a single chip solution for DDR rails providing VDD, VTT, and Vref in a monolithic solution.
Versal PRIME
AI XCXM1902 Minimum Rails and PL Performance
Versal PRIME
AI XCXM1802 for Optimized Efficiency
Versal PRIME
AI XCXM1802 for Full Management Mid to High Voltage
Versal PRIME
AI XCXM1802 for Low Voltage
XCXM1802 Low Voltage
XCXM1802 Low Voltage Efficiency
Versal AI Prime XCVC1802

Latest Discussions

3 Years Ago
LTpowerPlay LTC3887+LTC3870 support
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LTC3887 GPIO_FAULT_RESPONSE
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DC2263A-B Q19 is always on
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