AAT4685IWP-1-T1

Power Switch Hi Side 1.9A 12Pin TDFN EP T/R

The AAT4685 OVPSwitch™ is a member of AnalogicTech’s Application Specific Power MOSFET™ ASPM™ product family. It is an N-channel MOSFET power switch with precise over-voltage protection control, designed to protect low-voltage systems against high-voltage faults up to +28V. It also integrates over-current protection OCP, battery over-voltage protection BOVP and overtemperature protection OTP. When the input voltage exceeds the programmed overvoltage threshold, the N-channel MOSFET switch will be turned off to prevent damage to the output load circuits. An external resistor divider is adopted to program the adjustable version over-voltage trip point. Over-current protection protects the case of output short circuits by disconnecting the load from the input supply. A battery voltage monitor is integrated and disconnect the IN and OUT when the battery voltage exceed its rated voltage. The AAT4685 also monitors its own die temperature and OVP switch off if it becomes too hot. The AAT4685 includes an under-voltage lockout UVLO protection circuit, which puts the device into sleep mode at low input voltages only consuming 100µA current. It also includes two indicators: input supply power good indicator POK which is always active whether EN is low or high, and a fault flag indicator FLT which goes to active low when a fault condition OV, OC, BOV and OT occurs at EN = low. The AAT4685 is offered in a Pb-free, 3x3mm 12-pin TDFN package with a pin-out optimized for safety and is specified for operation over the -40°C to +85°C ambient temperature range.