Product Overview

Product Overview
NCP349: Positive Overvoltage Protection Circuit with Internal Low Ron NMOS
FET
For complete documentation, see the data sheet
Product Description
The NCP349 is able to disconnect the systems from its output pin in case wrong input operating conditions are detected. The
system is positive overvoltage protected up to +28 V.
Due to this device using internal NMOS, no external device is necesary, reducing the system cost and the PCB area of the
application board.
The NCP349 is able to instantaneously disconnect the output from the input, due to integrated Low Ron Power NMOS (65 mΩ, if the
input voltage exceeds the overvoltage threshold (OVLO) or undervoltage threshold(UVLO).
At powerup (EN(BAR) pin = low level), the Vout turns on ton after the Vin exceeds the undervoltage threshold.
The NCP349 provides a negative going flag(FLAG(BAR)) 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
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Overvoltage Protection up to 28 V
On-Chip Low RDS(on) NMOS Transistor: 65 m
Overvoltage Lockout (OVLO)
Undervoltage Lockout (UVLO)
Internal Soft start
Alert FLAG(BAR) Output
Shutdown EN(BAR) Input
Compliance to IEC61000-4-2 (Level 4), 8.0 kV (Contact), and 15 kV (Air)
ESD Ratings: Machine Model = B, Human Body Model = 3
This is a Pb-Free Device
For more features, see the data sheet
Applications
• Cell Phones, Camera Phones, Digital Still Cameras, PDA, and MP3 Players
Part Electrical Specifications
Product
Compliance
Status
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)
Package
Type
NCP349MNAETBG
Pb-free
Active
1.2
28
0.065
5.68
2.95
0.25
-40
85
DFN-6
Active
1.2
28
0.065
6.02
3.25
0.25
-40
85
DFN-6
Active
1.2
28
0.065
6.4
3.25
0.25
-40
85
DFN-6
Active
1.2
28
0.065
6.85
2.95
0.25
-40
85
DFN-6
Halide free
NCP349MNBGTBG
Pb-free
Halide free
NCP349MNBKTBG
Pb-free
Halide free
NCP349MNTBG
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016