NCP391

NCP391 Positive Overvoltage Protection Controller with Internal Low RON NMOS FET The NCP391 is able to disconnect the systems from its output pin when wrong input operating conditions are detected. The system is positive overvoltage protected up to +28 V. This device uses an internal NMOS and therefore, no external device is necessary, reducing the system cost and the PCB area of the application board. The NCP391 is able to instantaneously disconnect the output from the input, due to integrated Low RON Power NMOS, if the input voltage exceeds the overvoltage threshold (OVLO) or falls below the undervoltage threshold (UVLO). At powerup (EN pin = low level), the Vout turns on ton time after the Vin exceeds the undervoltage threshold. The NCP391 provides a negative going flag (FLAG) output, which alerts the system that a fault has occurred. In addition, the device has ESD−protected input (15 kV Air) when bypassed with a 1.0 mF or larger capacitor. Features Overvoltage Protection up to 28 V On−Chip Low RDS(on) NMOS Transistor Internal Charge Pump Overvoltage Lockout (OVLO) Undervoltage Lockout (UVLO) Soft−Start Alert FLAG Output Shutdown EN Input Compliance to IEC61000−4−2 (Level 4) 8.0 kV (Contact) 15 kV (Air) ESD Ratings: Machine Model = B Human Body Model = 2 WLCSP6 1.31x1.04 mm Package This is a Pb−Free Device Applications Cell Phones Camera Phones Digital Still Cameras Personal Digital Applications MP3 Players http://onsemi.com WLCSP6 FCA...