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PMBus 6-Channel Power-Supply Manager

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

Product Details

Key Features

Parametric specs for Power-Supply Sequencers and Voltage Trackers
# Input Channels 6
Interface I2C/SMBus
PMBus™
Option Monitor
Sequence
VIN (V) (max) 3.3
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/40
Budgetary
Price (See Notes)
3.37
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Simplified Block Diagram

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Parameters

Parametric specs for Power-Supply Sequencers and Voltage Trackers
# Input Channels 6
Interface I2C/SMBus
PMBus™
Option Monitor
Sequence
VIN (V) (max) 3.3
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/40
Budgetary
Price (See Notes)
3.37

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

Description

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.

Simplified Block Diagram

MAX34440: Block Diagram MAX34440: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .