NCP391 Datasheet, PDF (1/12 Pages) ON Semiconductor – Positive Overvoltage Protection Controller with Internal Low RON NMOS FET

NCP391
Positive Overvoltage
Protection Controller with
Internal Low R_ON 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 R_ON 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 V_out turns on t_on time after
the V_in 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 R_DS(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
MARKING
DIAGRAM
WLCSP6
FC SUFFIX
CASE 499BP
XXXXG
AYWW
XXXX = Specific Device Code
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
IN
EN
1
6
IN
GND
or
2
5
OUT
3
FLAG
4
(Top View)
IN
EN
A1
B1
IN
GND
A2
B2
OUT
A3
FLAG
B3
(Top View)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 11 of this data sheet.
© Semiconductor Components Industries, LLC, 2011
1
August, 2011 − Rev. 1
Q
Publication Order Number:
NCP391/D