PMBus 12-Channel Voltage Monitor and Sequencer

Provides Unparalleled Sequencing, Monitoring, and "Black Box" Fault Logging of Up to 12 POL Power Supplies

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The MAX34460 is a system monitor that is capable of managing up to 12 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.
MAX34460: Typical Operating Circuit MAX34460: Typical Operating Circuit Enlarge+

Key Features

  • 12 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 Time-Based or Event-Based Sequencing
  • Supports Dual-Sequencing Groups
  • Supports Up to Five Temperature Sensors (One Internal/Four Remote)
  • Fault Detection on All Temperature Sensors
  • Programmable Alarm Outputs
  • Reports Peak and Average Levels for a Number of Parameters
  • Watchdog Timer Function
  • 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 20 GPOs
  • No External Clocking Required
  • 3.0V to 3.6V Supply Voltage


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

See parametric specs for Power-Supply Sequencers and Voltage Trackers (43)

Part NumberOptionInterfaceInput ChannelsVIN
Oper. Temp.
maxSee Notes
123.3-40 to +85
$4.11 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX34460EVKIT: Evaluation Kit for the MAX34460
Product Reliability Reports: MAX34460.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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