PMBus Power-Supply Data Logger

Detects and Records Out-of-Range Power-Supply Conditions to Determine Failure or Misuse

Please check latest availability status for a specific part variant.


The MAX34446 data logger for power supplies can monitor voltages for overvoltage and undervoltage, as well as for overcurrent conditions and overtemperature conditions. The device constantly checks for userprogrammable thresholds; when these thresholds are exceeded, the device logs the recent real-time operating conditions in nonvolatile flash memory. The device can monitor up to four voltages or currents, and can monitor three temperature sensors. See the Typical Application Circuit/Block Diagram for more details.
MAX34446: Typical Application Circuit/Block Diagram MAX34446: Typical Application Circuit/Block Diagram Enlarge+

Key Features

  • Voltage, Current, and Temperature Measurement and Threshold Excursion Detection
  • Supports Up to Four Voltage or Current Measurements
  • Supports Up to Three Temperature Sensors: Two Remote Diodes Plus an Internal Sensor
  • Calculates Power Consumption
  • Differential 12-Bit ADC
  • PMBus™-Compliant Control Interface
  • Power-Good Outputs
  • Individual Fault Outputs
  • On-Board Nonvolatile Fault Logging and Default Configuration Setting
  • I²C/SMBus-Compatible Serial Bus with Bus Timeout Function
  • No External Clocking Required
  • 2.7V to 5.5V Supply Voltage
  • Low Power Consumption
  • -40°C to +105°C Temperature Range
  • 40-Pin TQFN (6mm x 6mm) Package


  • Base Stations
  • Industrial Controls
  • Network Switches/Routers
  • Servers
  • Smart Grid Network Systems
Part NumberOptionInterfaceInput Chan.VIN
Oper. Temp.
maxSee Notes
MAX34446 Monitor
45.5-40 to +85
$2.98 @1k
See All Power-Supply Sequencers and Voltage Trackers (51)
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.

Technical Documents

Tutorial 5133 Power-Supply Solutions for Altera FPGAs
Tutorial 5132 Power-Supply Solutions for Xilinx FPGAs

Quality and Environmental Data

Product Reliability Reports: MAX34446.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX34446ETL+
  • MAX34446ETL+CDJ
  • MAX34446ETL+T
  • MAX34446ETL+TCDJ
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >


    Related Resources

    Automotive ASIL-D 7-Channel Power-System Monitor

    • Small Solution
    • High Precision
    • Highly Integrated

    nanoPower Pushbutton On/Off Controller and Battery Freshness Seal

    • Low Power
    • Debounces Noisy Switches
    • Latched Output Supplies 20mA Load Current With Less Than 100mV Drop