LTC4366-2

LTC4366 High Voltage Surge Stopper FEATURES nn Rugged Floating Topology nn Wide Operating Voltage Range: 9V to >500V nn Adjustable Output Clamp Voltage nn Controls N-Channel MOSFET nn Adjustable Protection Timer nn Internal 9-Second Cool-Down Timer nn Shutdown IQ < 14µA nn 8-Lead TSOT and 3mm × 2mm DFN Packages APPLICATIONS nn Industrial, Automotive and Avionic Surge Protection nn High Voltage DC Distribution nn 28V Vehicle Systems DESCRIPTION The LTC®4366 surge stopper protects loads from high voltage transients. By controlling the gate of an external N-channel MOSFET, the LTC4366 regulates the output during an overvoltage transient. The load may remain operational while the overvoltage is dropped across the MOSFET. Placing a resistor in the return line isolates the LTC4366 and allows it to float up with the supply; therefore, the upper limit on the output voltage depends only on the availability of high valued resistors and MOSFET ratings. An adjustable overvoltage timer prevents MOSFET damage during the surge while an additional 9-second timer provides for MOSFET cool down. A shutdown pin reduces the quiescent current to less than 14µA during shutdown. After a fault the LTC4366-1 latches off while the LTC4366‑2 will auto-retry. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents pending. TYPICAL APPLICATION O...