LTC4360-1 Datasheet | Linear Technology

LTC4360-1/LTC4360-2 Overvoltage Protection Controller Features nn 2.5V to 5.5V Operation nn Overvoltage Protection Up to 80V nn No Input Capacitor or TVS Required for Most Applications nn 2% Accurate 5.8V Overvoltage Threshold nn <1µs Overvoltage Turn-Off, Gentle Shutdown nn Controls N-Channel MOSFET nn Adjustable Power-Up d V/dt Limits Inrush nn Reverse Voltage Protection (LTC4360-2) nn Power Good Output nn Low Current Shutdown (LTC4360-1) nn Available in a Tiny 8-Lead SC70 Package APPLICATIONS nn USB Protection nn Handheld puters nn Cell/Smart Phones nn MP3/MP4 Players nn Digital Cameras All registered trademarks and trademarks are the property of their respective owners. DESCRIPTION The LTC®4360 overvoltage protection controller safeguards 2.5V to 5.5V systems from power supply overvoltage. It is designed for portable devices with multiple power supply options including wall adaptors, car battery adaptors and USB ports. The LTC4360 controls an external N-channel MOSFET in series with the input power supply. During overvoltage transients, the LTC4360 turns off the MOSFET within 1µs, isolating downstream ponents from the input supply. Inductive cable transients are absorbed by the MOSFET and load capacitance. In most applications, the LTC4360 provides protection from transients up to 80V without requiring transient voltage suppressors or other external ponents. The LTC4360 has a delayed start-up and an adjustable d V/dt ramp-up for inrush current limiting. A PWRGD pin provides power good monitoring for VIN. Following an overvoltage condition, the LTC4360 automatically restarts with a start-up delay. The LTC4360-1 Features a soft shutdown controlled by the ON pin, while the LTC4360-2 controls an optional external P-channel MOSFET for negative voltage protection. TYPICAL APPLICATION Protection from Overvoltage Si1470DH 5V GATE VOUT 5V 1.5A COUT ON PWRGD 436012 TA01a Output Protected from Overvoltage at Input VIN,...