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

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.

Applications

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

* Integration Reduces Solution Size for Blade Servers and Other Space-Constrained Designs

* Integrated 10.6mΩ (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

* 6.6A (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)