Linear Technology Corporation introduces the LTC4231, an ultralow quiescent current (IQ) Hot Swap controller, enabling safe board or battery insertion and extraction from 2.7V to 36V systems. The LTC4231 controls an external N-channel MOSFET to gently power up board capacitors, avoiding sparks, connector damage and system glitches. Device quiescent current is a mere 4µA during normal operation, dropping to 0.3µA in shutdown mode. Other features include:
• Availability in two options: the LTC4231-1 remains off after an overcurrent fault, whereas the LTC4231-2 automatically attempts to turn on after a 500ms cooldown period.
• Specified over the 0°C to 70°C commercial and -40°C to 85°C industrial temperature ranges.
• 12-pin MSOP and 3mm x 3mm QFN packages.
For more information on the LTC4231, visit www.linear.com.