MAX5079

PRODUCTION

ORing MOSFET Controller with Ultra-Fast 200ns Turn-Off

Data Sheet (Rev. 4) Product Selection Table

Part Models: 2
1ku List Price: Starting From $3.40

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Part Details

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 AuxiliaryVoltage
- 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

Part Models: 2
1ku List Price: Starting From $3.40

Documentation

Data Sheet 1

MAX5079: ORing MOSFET Controller with Ultra-Fast 200ns Turn-Off Data Sheet (Rev.4) 07/22/2019

Reliability Data 1

MAX5079 Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX5079EUD+	Thin Shrink Small-Outline Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX5079EUD+T	Thin Shrink Small-Outline Package	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Evaluation Kits

Evaluation Kit for the MAX5079

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Features and Benefits

N+1 Redundant System for a 3V to 13.2V Bus (1V Circuit Operation with Reconfiguration)
Eliminates ORing Diode Power Dissipation
Adjustable Reverse-Voltage-Detection Threshold
Adjustable Undervoltage Threshold (Configured to 3.0V)
Adjustable Overvoltage Threshold (Configured to 13.2V)
OVP_ and PGOOD_ Status Indicators
Supports Up to 20A of Load Current
Simulates Catastrophic Fault Conditions at the Inputs
Fully Assembled and Tested

Product Details

The MAX5079 evaluation kit (EV kit) demonstrates the functionality of the MAX5079 ORing MOSFET controller in a parallel-connected power-supply system. The EV kit circuit is configured to connect two power supplies in parallel using ORing MOSFETs to simulate a fault condition, and to depict the isolation of the bus during the fault condition. The EV kit is configured for 3.0V to 12.6V input operation. The external undervoltage-lockout threshold is configured to 3.0V, and the overvoltage threshold is configured to 13.2V. Operation down to 1V is possible with circuit reconfiguration and an additional auxiliary power supply. The MAX5079 controller, along with an n-channel MOSFET, provides the functionality of a diode with an extremely low forward-voltage drop.

The MAX5079 controllers on the EV kit monitor the respective input voltages at VIN1 and VIN2 with respect to the power bus voltage V_BUS. When the V_{IN_} voltage rises above the V_BUS voltage, the MOSFET is quickly turned on. If either V_{IN_} power-supply voltage falls below V_BUS, the MAX5079 discharges the MOSFET gate with 2A (typ) sink current and turns off the MOSFET within 200ns (typ), effectively isolating the bus.

Applications

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

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