PMBus 6-Channel Power-Supply Manager

 

Part Number	Replacement	Explanation

Description

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The MAX34440 is a complex system monitor that can manage up to six power supplies. The power-supply manager monitors the power-supply output voltage and constantly checks for user-programmable overvoltage and undervoltage thresholds. It can also margin the power-supply output voltage up or down to a user-programmable level. The margining is performed in a closed-loop arrangement whereby the device automatically adjusts a pulse-width-modulated (PWM) output and then measures the resultant output voltage. The power-supply manager can also sequence the supplies in any order at both power-up and power-down. With the addition of an external current-sense amplifier, the device can also monitor currents.

MAX34440: Block Diagram Enlarge+

Key Features

• 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

Applications/Uses

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