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Product Attributes

Introduction

The surge stopper with ideal diode controller protects loads from high voltage transients. It limits and regulates the output during an overvoltage event, such as load dump in automobiles, by controlling the voltage drop across an external N-channel MOSFET pass device. The surge stopper also includes a timed, current limited circuit breaker. In a fault condition, an adjustable fault timer must expire before the pass device is turned off. The - 1 latches off the pass device while the - 2 automatically restarts after a delay. The surge stopper precisely monitors the input supply for overvoltage (OV) and undervoltage (UV) conditions. The external MOSFET is held off in undervoltage and auto-retry is disabled in overvoltage. An integrated ideal diode controller drives a second MOSFET to replace a Schottky diode for reverse input protection and output voltage holdup. The surge stopper controls the forward voltage drop across the MOSFET and minimizes reverse current transients upon power source failure, brownout or input short.

Features

• Wide Operating Voltage Range: 4V to 80V
• Withstands Surges Over 80V with Vcc Clamp
• Adjustable Output Clamp Voltage
• Ideal Diode Controller Holds Up Output Voltage During Input Brownouts
• Reverse Input Protection to - 40V
• Reverse Output Protection to - 20V
• Overcurrent Protection
• Low 10uA Shutdown Current at 12V
• Adjustable Fault Timer
• 0.1% Retry Duty Cycle During Faults (LTC4364 - 2)
• Available in 4mm × 3mm 14 - Lead DFN, 16 - Lead MSOP, and 16 - Lead SO Packages
• AEC - Q100 Qualified for Automotive Applications

Applications

• Automotive Surge Protection
• Hot Swap/Live Insertion
• Redundant Supply ORing
• Output Port Protection