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Home » NEWEST Products » New by Manufacturer » Maxim Integrated » Maxim MAX5988A/B Class 1/2 Powered Devices
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Maxim MAX5988A/B Class 1/2 Powered Devices

Maxim MAX5988A/B Class 1/2 Powered Devices

Maxim Integrated MAX5988A / MAX5988B IEEE® 802.3af-compliant Class 1 / Class 2 Powered Devices (PDs) provide a complete power-supply solution in a Power-over-Ethernet (PoE) system. MAX5988A and MAX5988B integrate the PD interface with an efficient DC-DC converter, offering a low external part count PD solution. These devices also include a low-dropout regulator, MPS, sleep, and ultra-low power modes. The PD interface provides a detection signature and a Class 1/Class 2 classification signature with a single external resistor. The PD interface also provides an isolation power MOSFET, a 60mA (max) inrush current limit, and a 321mA (typ) operating current limit. The integrated step-down DC-DC converter uses a peak current-mode control scheme and provides an easy-to-implement architecture with a fast transient response.

  • IEEE 802.3af Compliant
  • PoE Class 1/Class 2 Classification
  • Sleep and Ultra-Low Power Mode
  • Intelligent Maintain Power Signature (MPS)
  • Simplified Wall Adapter Interface
  • Efficient, Integrated DC-DC Converter (with Integrated Switches)
  • 8.8V to 60V Wide Input Voltage Range
  • 3.0V to 14V Programmable Output Voltage Range
  • Internal Compensation
  • Fixed 215kHz Switching Frequency
  • Frequency Foldback for High-Efficiency Light-Load Operation
  • Built-In Output-Voltage Monitoring
  • Open-Drain, Active-Low RESET Output
  • Protects Against Overload, Output Short Circuit, Output Overvoltage, and Overtemperature
  • Hiccup-Mode Runaway Current Limit
  • Back-Bias Capability to Optimize the Efficiency
  • Integrated TVS Diode Withstands Cable Discharge Event (CDE)
  • Internal LDO Regulator with Up to 100mA Load
  • IEEE® 802.3af-Powered Devices
  • IP Phones
  • IP Security Cameras
  • WiMAX® Base Stations
  • Wireless Access Nodes

Functional Diagram

Functional Diagram
  • Maxim Integrated
  • Semiconductors|Integrated Circuits|IC-Power Management