PMBus 16-Channel Voltage Monitor and Sequencer

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

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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.
MAX34461: Typical Operating Circuit MAX34461: Typical Operating Circuit Enlarge+

Key Features

  • 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


  • Base Stations
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems
Product Reliability Reports: MAX34461.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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