LTC4281

RECOMMENDED FOR NEW DESIGNS

Hot Swap Controller with I2C Compatible Monitoring

Data Sheet (Rev. C) Product Selection Table
Part Models
6
1ku List Price
Starting From $6.35
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Part Details

  • 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
LTC4281
Hot Swap Controller with I2C Compatible Monitoring
LTC4281 Application Circuit LTC4281 Performance Graph LTC4281 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC4280
RECOMMENDED FOR NEW DESIGNS Hot Swap Controller with I2C Compatible Monitoring
LTC4282
RECOMMENDED FOR NEW DESIGNS High Current Hot Swap Controller with I2C Compatible Monitoring
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC4281
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
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 2
schematic 3
DC2278A-A

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

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Product Details

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.

eval board
schematic 4
schematic 5
DC2278A-B

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

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Product Details

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.
DC2578A
Total Power Management: Hot Swap, Intermediate Bus Voltage, Point-of-Load (Featuring LTC4281, LTC3886, LTC3887, LTC2975) [Requires DC1613]
DC2578A
DC2278A-A
LTC4281 Demo Board | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]
DC2278A - Schematic DC2278A-A - Demo Board Image
DC2278A-B
LTC4281 Demo Board with Programming Socket | 12V, 50A Hot Swap Controller with Telemetry [Requires DC1613]
DC2278A - Schematic DC2278A-A - Demo Board Image

Reference Designs

Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Block Diagram
Stratix 10 GX Signal Integrity Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit (updated alternate Simplified Power Tree: 12Vin to required I/O voltages)
Stratix 10 GX Signal Integrity Development Kit Circuits from the lab

View Detailed Reference Design

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.
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit
Stratix 10 GX Signal Integrity Development Kit Block Diagram
Stratix 10 GX Signal Integrity Development Kit (Actual Power Tree representative of components used on board)
Stratix 10 GX Signal Integrity Development Kit (updated alternate Simplified Power Tree: 12Vin to required I/O voltages)

Latest Discussions

2 Years Ago
RE: LTC4281 calculation issues
2 Years Ago
RE: LTC7004IMSE#WTRPBF FIT data
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