onsemi | NCP361SNT1G

The NCP361 disconnects systems at its output when wrong VBUS operating conditions are detected at its input. The system is positive over−voltage protected up to +20 V. Thanks to an integrated PMOS FET, no external device is necessary, reducing the system cost and the PCB area of the application board.

The NCP361 is able to instantaneously disconnect the output from the input if the input voltage exceeds the overvoltage threshold (5.675 V). Thanks to an overcurrent protection, the integrated PMOS is turning off when the charge current exceeds current limit. The NCP361 provides a negative going flag (FLAG) output, which alerts the system that voltage, current or overtemperature faults have occurred. In addition, the device has ESD−protected input (15 kV Air) when bypassed with a 1 µF or larger capacitor.

Key Features:

• Overvoltage Protection up to 20 V
• On−chip PMOS Transistor
• Overvoltage Lockout (OVLO)
• Undervoltage Lockout (UVLO)
• Overcurrent Protection
• Alert FLAG Output
• EN Enable Pin
• Thermal Shutdown
• Compliance to IEC61000−4−2 (Level 4) 8 kV (Contact) 15 kV (Air)
• ESD Ratings:
  • Machine Model = B
  • Human Body Model = 2
• 6 Leads UDFN 2x2 mm Package
• 5 Leads TSOP−5 3x3 mm Package
• This is a Pb−Free Device

Benefits:

• When wall adapter or AC-DC overvoltage appears, the internal pass element is turned off very fast in order to protect the downstream system. The current consumption is around 25 µA although the very fast turn off capability.
• No external device is necessary.
• Typical OVLO is set to 5.675 V. 
• Typical UVLO is set to 3.0 V.
• Typical OCP is set to 750 mA.
• The microcontroller can take into account Flag status and controls thanks to EN pin the pass element state.
• The OVP device can be forced to off state thanks to this pin.
• When internal junction temperature is exceeded, the pass element is turned off.
• Very small package, small thickness.
• Low cost version. 

Applications:

• USB Devices
• Mobile Phones
• Peripheral
• Personal Digital Applications
• MP3 Players
• Set Top Boxes