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Home » NEWEST Products » New by Manufacturer » Maxim Integrated » MAX34440 PMBus 6-Channel PSM - Maxim
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Maxim MAX34440 PMBus 6-Channel Power Supply Manager

Maxim MAX34440 PMBus 6-Channel Power Supply Manager

Maxim Integrated's MAX34440 6-Channel Power-Supply Manager is a PMBus™-compliant, highly integrated system monitor based upon a 16-bit MAXQM microcontroller with factory-programmed functionality to monitor up to six power supplies. MAX34440 provides power-supply closed-loop control, and local/remote thermal-sensing facilities.

MAX34440 monitors the power-supply output voltage and continually checks for user-programmable overvoltage and under voltage thresholds. This Maxim Integrated device is designed to margin the power-supply output voltage up or down to a user-programmable level in a closed-loop arrangement. The closed-loop arrangement allows the MAX34440 to automatically adjust a pulse-width-modulated (PWM) output and then measure the resulting output voltage. This Maxim Power-Supply Manager can also sequence the supplies in any order at both power-up and power-down. Using an external current-sense amplifier, Maxim Integrated's MAX34440 6-Channel Power-Supply Manager can also monitor currents.

Thermal monitoring is performed using up to eight temperature sensors, including an on-chip thermal sensor, four DS75LV digital thermometers, and a MAX6695 dual remote/local thermal temperature sensor. Communication with the DS75LV and MAX6695 temperature sensors is conducted through a dedicated I2C/ SMBus interface.

  • 6 Channels of Power-Supply Management
    • Voltage Measurement/Monitoring
      • Differential 12-Bit 1% Accurate ADC
      • Min/Max Threshold Excursion Detection
    • Supports Current Monitoring with External Current-Sense Amplifier
    • Automatic Closed-Loop Margining
    • Programmable Up and Down Sequencing
    • Power-Good Output
  • Supports Up to Eight Temperature Sensors
    • Two Remote Diode Temperature Sensors
    • Five Local Temperature Sensors
    • One Internal Temperature Sensor
    • Fault Detection on All Temp Sensors
  • PMBus™-Compliant Command Interface
  • I²C/SMBus-Compatible Serial Bus with Bus Timeout Function
  • On-Board Nonvolatile Fault Logging and Default Configuration Setting
  • No External Clocking Required
  • +3.3V Supply Voltage
General Specifications
  • Reset Delay Time: 5ms
  • Supply Voltage - Min: 2.7V
  • Supply Voltage - Max: 5.5V
  • Minimum Operating Temperature: - 40ºC
  • Maximum Operating Temperature: + 85ºC
  • Mounting Style: SMD/SMT
  • Package / Case: TQFN-40 EP
  • Maximum Power Dissipation: 2.86W
  • Operating Supply Current: 2.5mA
  • Power Fail Detection: Yes
  • Type: Voltage Supervisory

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

Block Diagram
Maxim MAX34440 PMBus 6-Channel Power Supply Manager Block Diagram
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  • Maxim Integrated