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PDF NCP349 Data sheet ( Hoja de datos )
| Número de pieza | NCP349 | |
| Descripción | 28V Overvoltage Protection IC | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de NCP349 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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NCP349www.DataSheet4U.com
Positive Overvoltage
Protection Controller with
Internal Low RON NMOS FET
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
necessary, 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 mW), if the
input voltage exceeds the overvoltage threshold (OVLO) or
undervoltage threshold (UVLO).
At powerup (EN pin = low level), the Vout turns on ton time after
the Vin exceeds the undervoltage threshold.
The NCP349 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 RDS(on) NMOS Transistor: 65 mW
• 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 = 3
• DFN6 1.6x2 mm Package
• This is a Pb−Free Device
Applications
• Cell Phones
• Camera Phones
• Digital Still Cameras
• Personal Digital Applications
• MP3 Players
http://onsemi.com
6
1
DFN6
MN SUFFIX
CASE 506BM
MARKING
DIAGRAM
1
XX MG
G
XX = Specific Device Code
M = Date Code
G = Pb−Free Package
PIN CONNECTIONS
IN 1
GND 2
FLAG 3
PAD1
IN
6 EN
5 OUT
4 OUT
(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, 2009
March, 2009 − Rev. 0
1
Q
Publication Order Number:
NCP349/D
1 page  
www.DataSheet4U.com
Vin
Vout
FLAG
NCP349
TIMING DIAGRAMS
UVLO
ton
0.3 V
tstart
<OVLO
Vin − (RDS(on) I)
1.2 V
Figure 3. Startup
OVLO
Vin
Vout
Vin − (RDS(on)
I)
toff
0.3 V
FLAG
tstop
0.4 V
Figure 4. Shutdown on Overvoltage Detection
EN
Vout
Vin − (RDS(on)
I)
1.2 V
tdis
FLAG
0.3 V
Figure 5. Disable on EN = 1
EN
Vin
FLAG
1.2 V
OVLO
UVLO
ton + tstart
Figure 6. FLAG Response with EN = 1
http://onsemi.com
5
5 Page 
NCP349
www.DataOShReDeEt4RUI.NcoGmINFORMATION
Device
Marking
Package
Shipping†
NCP349MNAETBG
AE
DFN6
(Pb−Free)
3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
SELECTION GUIDE
The NCP349 can be available in several undervoltage and overvoltage thresholds versions. Part number is designated as follows:
NCP349MNxxTxG
Code
a
b
c
ab c
Contents
UVLO Typical Threshold
a: A = 2.95 V
OVLO Typical Threshold
b: E = 5.68 V
Tape & Reel Type
c: B = 3000
http://onsemi.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet NCP349.PDF ] | |
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