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.
   
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