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MAX34440：PMBus 6-Channel Power-Supply Manager

Power-Supply Manager Provides Unparalleled "Black Box" Failure Logging for Improving System Performance

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.

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

MAX34440: Block Diagram Applications/Uses Base Stations Industrial Controls Network Switches/Routers Servers Smart Grid Network Systems

DataSheet

Parametrics

Quality and Environmental Data

• MAX34440.pdf

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• MAX34441：PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller

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