PMBus 16-Channel Voltage Monitor and Sequencer

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Provides Unparalled Sequencing, Monitoring, and "Black Box" Fault Logging of Up to 16 POL Power Supplies

Part Details
  • 16 Channels of Power-Supply Management
  • Power-Supply Voltage Measurement and Monitoring
  • Fast Minimum/Maximum Threshold Excursion Detection
  • Remote Ground Sensing Improves Measurement Accuracy
  • Automatic Closed-Loop Margining
  • Programmable Up and Down Sequencing
  • Supports Up to Five Temperature Sensors (One Internal/Four Remote)
  • Fault Detection on All Temperature Sensors
  • Reports Peak and Average Levels for a Number of Parameters
  • PMBus™-Compliant Command Interface
  • I²C/SMBus-Compatible Serial Bus with Bus Timeout Function
  • On-Board Nonvolatile Black Box Fault Logging and Default Configuration Setting
  • Expandable Channel Operation with Parallel Devices
  • Up to 16 GPOs
  • No External Clocking Required
  • 3.0V to 3.6V Supply Voltage
Additional Details
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The MAX34461 is a system monitor that is capable of managing up to 16 power supplies. The power-supply manager monitors the power-supply output voltages and constantly checks for user-programmable overvoltage and undervoltage thresholds. If a fault is detected, the device automatically shuts down the system in an orderly fashion. The device can sequence the supplies in any order at both power-up and power-down. With the addition of external current DACs, the device has the ability to close-loop margin the power-supply output voltages up or down to a user-programmable level. The device contains an internal temperature sensor and can support up to four external remote temperature sensors. Once configured, the device can operate autonomously without any host intervention.


  • Base Stations
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems

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