MAX8535EUA+

The MAX8535EUA+ is an ORing MOSFET controller with fastest fault isolation for redundant power supplies in 8 pin µMAX package. The critical loads often employ parallel-connected power supplies with redundancy in order to enhance system reliability. It is highly integrated but inexpensive MOSFET controller that provides isolation and redundant power capability in high-reliability systems. The MAX8535 is used in 12V systems and have an internal charge pump to drive the gates of n-channel pass elements to VCC + 10V. During start-up, the MAX8535 monitor the voltage drop across external MOSFETs. Once VCC approaches or exceeds the bus voltage, the MOSFETs are turned on. The MAX8535 feature a dual-purpose TIMER input. A single external resistor from TIMER to ground sets the turn-on speed of the external MOSFETs. Optionally, TIMER input can be used as a logic-enable pin. Once the device is turned on, it monitors load, protecting against overvoltage, undervoltage and reverse-current conditions.

• Supply voltage range is 8V to 14V
• Operating temperature range from -40°C to 85°C
• Simple, integrated and inexpensive ORing MOSFET controller
• Eliminates ORing diode power dissipation and reverse leakage current
• Provides N + 1 redundant supply capability for highly reliable systems
• Isolates failed supply from output bus in <lt/>1μs
• Reverse current flow detection
• Programmable soft start
• Adjustable overvoltage and undervoltage trip points
• Logic enable input and fault indicator output

Applications

Power Management

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party