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MAXIM MAX5079EUD+ product image
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MAXIM MAX5079EUD+

Manufacturer
MAXIM
MPN
MAX5079EUD+
LCSC Part #
C1524009
Packaging
TSSOP-14
Customer #
Key Attributes
TSSOP-14 OR Controllers, Ideal Diodes RoHS
DatasheetMAXIM MAX5079EUD+
Every Order Guarantee
100% Authentic · 30-Day Return or Replacement

Products Specifications

All
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/OR Controllers, Ideal Diodes
ManufacturerMAXIM
PackagingTSSOP-14
FunctionReverse current blocking;Overvoltage lockout;Under-voltage lockout
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Introduction

AI Translation

The MAX5079 ORing MOSFET controller replaces ORing diodes in high-reliability redundant, parallel-connected power supplies. Despite their low forward-voltage drop, ORing Schottky diodes cause excessive power dissipation at high currents. The MAX5079 allows for the use of low-on-resistance n-channel power MOSFETs to replace the Schottky diodes. This results in low power dissipation, smaller size, and elimination of heatsinks in high-power applications. The MAX5079 operates from 2.75V to 13.2V and includes a charge pump to drive the high-side n-channel MOSFET. Operation down to 1V is possible if an auxiliary voltage of at least 2.75V is available. When the controller detects a positive voltage difference between IN and BUS, the n-channel MOSFET is turned on. The MOSFET is turned off as soon as the MAX5079 sees a negative potential at IN with respect to the BUS voltage, and is automatically turned back on when the positive potential is restored. Under fault conditions, the ORing MOSFET’s gate is pulled down with a 1A current, providing an ultra-fast 200ns turn-off. The reverse voltage turn-off threshold is externally adjustable to avoid unintentional turn-off of the ORing MOSFET due to glitches at IN or BUS caused by hot plugging the power supply. Additional features include an OVP flag to facilitate shutdown of a failed power supply due to an overvoltage condition, and a PGOOD signal that indicates if VIN is either below the undervoltage lockout or VBUS is in an overvoltage condition. The MAX5079 operates over the -40°C to +85°C temperature range and is available in a space-saving 14-pin TSSOP package.

Features

AI Translation
  • Drives External MOSFETs Reducing Power Dissipation and Board Space
  • 2.75V to 13.2V Input ORing Voltage
  • 1V to 13.2V Input ORing Voltage with 2.75V Auxiliary Voltage
  • 14-Pin TSSOP Package
  • Protection Features Increase System Reliability
  • 2A MOSFET Gate Pulldown Current During Fault Condition
  • Ultra-Fast 200ns, MOSFET Turn-Off During Fault Condition
  • Supply Undervoltage and Bus Overvoltage Detection
  • Power-Good (PGOOD) and Overvoltage (OVP) Outputs for Fault Detection

Applications

AI Translation
  • Paralleled DC-DC Converter Modules
  • N+1 Redundant Power Systems
  • Servers
  • Base-Station Line Cards
  • RAID
  • Networking Line Cards