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 Title	Document ID/Size	Revision	Revision Date
USB Positive Overvoltage Protection and Overcurrent Protection	NCP361/D (717.0kB)	4

Package Drawings (2)

Document Title	Document ID/Size	Revision
TSOP-5	483 (32.5kB)	M
UDFN6, 2x2, 0.65P	517AB (60.5kB)	C

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCP361MUTBG	Active	Pb-free Halide free	UDFN-6	517AB	1	Tape and Reel	3000	$0.3333
NCP361SNT1G	Active	Pb-free Halide free	TSOP-5 / SOT-23-5	483	1	Tape and Reel	3000	$0.24

Specifications

Product	VCC Min (V)	VCC Max (V)	P(AV) Max (W)	VIT+ Typ (V)	VIT Typ (V)	IDDH Max (µA)	TA Min (°C)	TA Max (°C)
NCP361MUTBG	1.2	20	0.3	5.675	3	35	25	85
NCP361SNT1G	1.2	20	0.3	5.675	3	35	25	85

USB Positive Overvoltage Protection and Overcurrent Protection (717.0kB) NCP361

UDFN6, 2x2, 0.65P NCP398

TSOP-5 NUP4004M5