LTC4281
Info : RECOMMENDED FOR NEW DESIGNS
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LTC4281

Hot Swap Controller with I2C Compatible Monitoring

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 6
1ku List Price Starting From $6.35
Features
  • Allows Safe Board Insertion Into Live Backplane
  • 12-/16-Bit ADC with ±0.7% Total Unadjusted Error
  • Monitors Current, Voltage, Power and Energy
  • Internal EEPROM for Nonvolatile Configuration
  • Wide Operating Voltage Range: 2.9V to 33V
  • I2C/SMBus Digital Interface (Coexists with PMBus Devices)
  • 12V Gate Drive for Lower MOSFET RDS(ON)
  • Programmable Current Limit with 2% Accuracy
  • MOSFET Power Limiting with Current Foldback
  • Continuously Monitors MOSFET Health
  • Stores Minimum and Maximum Measurements
  • Alerts When Alarm Thresholds Exceeded
  • Reboots on I2C Command
  • Input Overvoltage and Undervoltage Protection
  • Three General Purpose Input/Outputs
  • Internal ±5% or External Timebases
  • 28-Pin 4mm × 5mm QFN Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC4281 Hot Swap controller allows a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, board supply voltage and inrush current are ramped up at an adjustable rate. An I2C interface and onboard ADC allows for monitoring of board current, voltage, power, energy and fault status.

The device features analog foldback current limiting to limit the MOSFET power to a constant value. A wide input voltage operating range comfortably allows applications from 2.9V to 33V.

The LTC4281 is well suited to high power applications because the precise monitoring capability and accurate current limiting reduce the extremes in which both loads and power supplies must safely operate. Non-volatile configuration allows for flexibility in the autonomous generation of alerts and response to faults.

Applications

  • Enterprise Servers and Data Storage Systems
  • Network Routers and Switches
  • Base Stations
  • Platform Management
Part Models 6
1ku List Price Starting From $6.35

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Oct 5, 2021

- 21_0206

Notification of Die Revision Change to LTC4281 and LTC4282

LTC4281CUFD#PBF

PRODUCTION

LTC4281CUFD#TRPBF

PRODUCTION

LTC4281IUFD#PBF

PRODUCTION

LTC4281IUFD#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 5, 2021

- 21_0206

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Notification of Die Revision Change to LTC4281 and LTC4282

LTC4281CUFD#PBF

PRODUCTION

LTC4281CUFD#TRPBF

PRODUCTION

LTC4281IUFD#PBF

PRODUCTION

LTC4281IUFD#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

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DC2278A-A

LTC4281 Demo Board | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

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DC2278A-A

LTC4281 Demo Board | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

LTC4281 Demo Board | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

Product Detail

Demonstration circuit 2278A features the LTC4281 hot swap controller. The LTC4281 is well suited to high power applications because the precise monitoring capability and accurate current limiting reduces the extremes in which both loads and power supplies must safely operate. Non-volatile configuration allows for flexibility in the autonomous generation of alerts and response to faults.

reference details image

DC2278A-B

LTC4281 Demo Board with Programming Socket | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

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DC2278A-B

LTC4281 Demo Board with Programming Socket | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

LTC4281 Demo Board with Programming Socket | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]

Product Detail

Demonstration circuit 2278A features the LTC4281 hot swap controller. The LTC4281 is well suited to high power applications because the precise monitoring capability and accurate current limiting reduces the extremes in which both loads and power supplies must safely operate. Non-volatile configuration allows for flexibility in the autonomous generation of alerts and response to faults.

reference details image

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 1

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.

Reference Designs

Reference Designs 1

Stratix 10 GX Signal Integrity Development Kit

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intel-stratix-10-SI-fpga-development-kit

intel-stratix-10-SI-fpga-development-kit

Circuits from the lab

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Features and Benefits

  • Analog Devices has worked closely with Intel PSG to develop verified power solutions that optimize cost, size and efficiency in high performance applications.
  • The validated power solutions include uModules power products that address time and space constraints while delivering high efficiency, reliability, and low noise.
  • The actual power tree represents the best solution at time of design.
  • A recommended power tree has also been included to present the ideal solution at time of Stratix 10 GX SI development kit release. An updated alternate version of the power tree represents the latest solutions available from Analog Devices. For many applications, an intermediate rail is not ideal, so recommendations for an alternate power tree that allows for direct power conversion from 12V input is provided below.
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