2.7V to 18V, 6.6A Integrated Hot-Swap/Electronic Circuit Breaker

Description

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The MAX15095 family of devices are integrated solutions for hot-swap applications requiring the safe insertion and removal of circuit line cards from a live backplane. They can also be used as electronics circuit breaker for hard drive and solid-state drive and fans. The devices integrate a hot-swap controller (10.6mΩ typ) power MOSFET, and an electronic circuit-breaker protection in a single package.

The devices are designed for protection of 2.7V to 18V supply voltages. These devices implement a foldback current limit during startup to control inrush current, lowering di/dt and keeping the MOSFET operating under safe operating area (SOA) conditions. After the startup cycle is complete, on-chip comparators provide VariableSpeed/BiLevel™ protection against short-circuit and overcurrent faults, and immunity against system noise and load transients. The load is disconnected in the event of a fault condition. The devices are factory calibrated to deliver accurate overcurrent protection with ±10% accuracy. During a fault condition, PG goes low and the devices latch off (MAX15095) or automatic retry (MAX15095A); the output could also be discharged after a fault event (MAX15095D).

The devices feature an IN-to-OUT short-circuit detection before startup. The devices provide a power-MOSFET GATE pin to program the slew rate during startup by adding an external capacitor. The devices have an undervoltage/overvoltage input pin (UVOV) that can detect an undervoltage/overvoltage fault and disconnect the IN from the OUT. Additional features include internal overtemperature protection and a power-good output (PG).

The devices are available in a 12-pin, 2.5mm x 2.5mm Flip Chip 2 QFN package (FC2QFN) and are rated over the -40°C to +105°C extended temperature range.

Key Features

• Integration Reduces Solution Size for Blade Servers and Other Space-Constrained Designs
  • Integrated 12mΩ (typ) Internal Power MOSFET
  • Programmable Overvoltage Protection and Undervoltage-Lockout Threshold
  • Drive-Present Signal Input (Active-Low PRSNT pin)
  • Thermal Protection
• Flexibility Enables Use in Many Unique Designs
  • 2.7V to 18V Operating Voltage Range
  • Programmable Inrush Current Control Under SOA Operation
  • Adjustable Circuit-Breaker Current/Current-Limit Threshold
  • Programmable Slew-Rate Control
  • Variable-Speed Circuit-Breaker Response
  • Latchoff (MAX15095) or Automatic Retry (MAX15095A) Options
• Safety Features Ensure Accurate, Robust Protection
  • 6A (max) Load Current Capability
  • ±10% Circuit-Breaker Threshold Accuracy
  • IN-to-OUT Short-Circuit Detection
  • Open-Drain PG Output
  • Output Discharge After a Fault Event (MAX15095D Only)
  • Programmable Additional Delay (2µs max) to Fast-Comparator Response Time
  • Enable Input (EN)

Applications/Uses

• Blade Servers
• Disk Drive Power
• Industrial Applications
• RAID Systems
• Server I/O Cards
• Storage Applications