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LMI800

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LMI800

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Product details

Vabsmax_cont (V) 1500 Vin (max) (V) 400, 800 Vin (min) (V) -400, 0 Features Adjustable OVLO, Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Integrated EEPROM, Overvoltage protection, PMBus, Power good signal, Reinforced isolation, Short circuit protection, adjustable UVLO Overcurrent response Circuit breaker Fault response Auto-retry Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.065 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125
Vabsmax_cont (V) 1500 Vin (max) (V) 400, 800 Vin (min) (V) -400, 0 Features Adjustable OVLO, Adjustable current limit, Adjustable soft start, Current monitoring, Fault output, Integrated EEPROM, Overvoltage protection, PMBus, Power good signal, Reinforced isolation, Short circuit protection, adjustable UVLO Overcurrent response Circuit breaker Fault response Auto-retry Overvoltage response Cut-off Rating Catalog Soft start Adjustable Quiescent current (Iq) (typ) (A) 0.065 Device type eFuses and hot swap controllers Operating temperature range (°C) -40 to 125
SSOP (DFP) 40 109.695 mm² (10.65 mm × 10.3 mm)
  • Isolated floating hotswap controller

    • Support 2-wire, 3-wire system architectures with high and low-side configurations

  • Integrated Isolated Power Supply for hotswap controller bias
  • GND referrenced signals with Reinforced insulation to 800V
    • PGOOD, Fault assertion on SMBA and PMBus Telemetry

  • Robust isolation barrier:

    • High lifetime at up to 1000VDC working voltage

    • Up to 5000VRMS isolation rating

    • Up to 10.4kV surge capability

  • SYNC pin for coordination between high and low side hotswap controllers

  • DISC pin for output capacitor discharge control

  • Strong gate pull down (1.2A) for fast turn OFF
  • Robust short circuit protection (360ns)
  • Failed FET detection
  • Programable UV, OV, tFAULT thresholds
  • External FET temperature sensing
  • PMBus® interface for telemetry, control, configuration and debug
    • On chip EEPROM nonvolatile memory for configuration
    • Precision VIN, VOUT, IIN, PIN, VAUX monitoring V (<±1.5%); I (<±1%); P (<±2%)
    • Power cycle with a single command
    • Blackbox fault recording of multiple events with relative time stamp stored in internal EEPROM
  • 12-bit ADC with 250kHz sampling rate
  • –40°C < TJ < 125°C operation
  • Isolated floating hotswap controller

    • Support 2-wire, 3-wire system architectures with high and low-side configurations

  • Integrated Isolated Power Supply for hotswap controller bias
  • GND referrenced signals with Reinforced insulation to 800V
    • PGOOD, Fault assertion on SMBA and PMBus Telemetry

  • Robust isolation barrier:

    • High lifetime at up to 1000VDC working voltage

    • Up to 5000VRMS isolation rating

    • Up to 10.4kV surge capability

  • SYNC pin for coordination between high and low side hotswap controllers

  • DISC pin for output capacitor discharge control

  • Strong gate pull down (1.2A) for fast turn OFF
  • Robust short circuit protection (360ns)
  • Failed FET detection
  • Programable UV, OV, tFAULT thresholds
  • External FET temperature sensing
  • PMBus® interface for telemetry, control, configuration and debug
    • On chip EEPROM nonvolatile memory for configuration
    • Precision VIN, VOUT, IIN, PIN, VAUX monitoring V (<±1.5%); I (<±1%); P (<±2%)
    • Power cycle with a single command
    • Blackbox fault recording of multiple events with relative time stamp stored in internal EEPROM
  • 12-bit ADC with 250kHz sampling rate
  • –40°C < TJ < 125°C operation

The LMI800PS is high voltage isolated floating hotswap controller designed to support 2-wire and 3-wire system architecture with high and low side configuration for server and datacentres. This device requires only single power supply input referred to user ground and utlizes inbuilt isolated power supply for the hotswap controller bias. All user interface are reinforced isolated to 800V and ensured alignment with UL safety standards.

The LMI800PS comes with SYNC pin for coordination between high and low side hotswap controllers which provides user a liberty to optimize the FET rating. The DISC pin provides control feature to discharge the output load capacitor during system plug out.

It has Programmable power limit threshold along with adjustable fault time (tFAULT) which further limits maximum power dissipation and ensure FET SOA protection under all critical events.

An integrated PMBus™interface enables remote monitoring, control, and configuration of the system in real time. Key parameters can be accessed remotely for telemetry, and various thresholds can be configured through PMBus or stored in internal non volatile memory.

The LMI800PS is high voltage isolated floating hotswap controller designed to support 2-wire and 3-wire system architecture with high and low side configuration for server and datacentres. This device requires only single power supply input referred to user ground and utlizes inbuilt isolated power supply for the hotswap controller bias. All user interface are reinforced isolated to 800V and ensured alignment with UL safety standards.

The LMI800PS comes with SYNC pin for coordination between high and low side hotswap controllers which provides user a liberty to optimize the FET rating. The DISC pin provides control feature to discharge the output load capacitor during system plug out.

It has Programmable power limit threshold along with adjustable fault time (tFAULT) which further limits maximum power dissipation and ensure FET SOA protection under all critical events.

An integrated PMBus™interface enables remote monitoring, control, and configuration of the system in real time. Key parameters can be accessed remotely for telemetry, and various thresholds can be configured through PMBus or stored in internal non volatile memory.

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* Data sheet LMI800PS High Voltage Isolated Hotswap Controller with PMBus Interface datasheet PDF | HTML Oct 6, 2026
White paper Hot-Swap Solutions for High-Voltage DC-Powered AI Servers PDF | HTML Oct 8, 2026

Design & development

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Evaluation board

LMI800PSEVM — LMI800 evaluation module

The LMI800PS evaluation module (EVM) contains evaluation and reference circuitry for the LMI800PS hot-swap controller. The LMI800PS device combines a high-performance hot-swap controller with a PMBus interface to accurately measure, protect, and control the electrical operating conditions of (...)

User guide: PDF | HTML
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