NCP361: Overvoltage Protection Circuit, USB Positive, with Internal PMOS FET and Overcurrent Protection

NCP361 is able to disconnect the system from its output pin in case wrong VBUS operating conditions are detected. The system is positive overvoltage protected up to +20 V. Thanks to the integrated PMOS FET, no external device is necessary, reducing the system cost and the PCB area of the application board. NCP361 is able to instantaneously disconnect the output from the input if the input voltage exceeds the overvoltage threshold (OVLO).Thanks to an overcurrent protection, the integrated PMOS is turning off when the charge current exceeds current limit (see options in ordering information). NCP361 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 µF or larger capacitor.

Features
  • Very Fast Protection, Up to 20 V, with 25 µA Current Consumption
  • On-chip PMOS Transistor
  • Overvoltage Lockout (OVLO)
  • Undervoltage Lockout (UVLO)
  • Overcurrent Protection.
  • Alert FLAG Output
  • EN Enable Pin
  • Thermal Shutdown
  • 6-Lead UDFN 2 x 2 mm Package
  • TSOP-5 3 x 3 mm Package
  • These are Pb-Free Devices
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. Additional thresholds can be manufactured. Please contact your ON Semiconductor Sales contact for further information.
  • Typical UVLO is set to 3.0 V. Additional thresholds can be manufactured. Please contact your ON Semiconductor Sales contact for further information.
  • Typical OCP is set to 750 mA. Additional thresholds can be manufactured. Please contact your ON Semiconductor Sales contact for further information.
  • 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
  • Personal Digital Applications
  • Mobile Phones
  • MP3 Players
  • Computing
  • USB Devices
  • Set Top Boxes
  • Peripherals
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
USB Positive Overvoltage Protection and Overcurrent ProtectionNCP361/D (717.0kB)4
Package Drawings (2)
Document TitleDocument ID/SizeRevision
TSOP-5483 (32.5kB)M
UDFN6, 2x2, 0.65P517AB (60.5kB)C
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP361MUTBGActivePb-free Halide freeUDFN-6517AB1Tape and Reel3000$0.3333
NCP361SNT1GActivePb-free Halide freeTSOP-5 / SOT-23-54831Tape and Reel3000$0.24
Specifications
ProductVCC Min (V)VCC Max (V)P(AV) Max (W)VIT+ Typ (V)VIT Typ (V)IDDH Max (µA)TA Min (°C)TA Max (°C)
NCP361MUTBG1.2200.35.6753352585
NCP361SNT1G1.2200.35.6753352585
USB Positive Overvoltage Protection and Overcurrent Protection (717.0kB) NCP361
UDFN6, 2x2, 0.65P NCP398
TSOP-5 NUP4004M5