NCP349:Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET and Status Flag
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.
技术特性
- Overvoltage Protection up to 28 V
- On-Chip Low RDS(on) NMOS Transistor: 65 m
- Overvoltage Lockout (OVLO)
- Undervoltage Lockout (UVLO)
- Internal 50 ms Startup Delay
- 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
应用
- Cell Phones, Camera Phones, Digital Still Cameras, Personal Digital Applicaitons, and MP3 Players
|
封装图 PACKAGE DIMENSIONS
|
订购信息 Ordering Information
| 产品 |
状况 |
Compliance |
具体说明 |
封装 |
MSL* |
容器 |
预算价格 (1千个数量的单价） |
| 类型 |
外形 |
类型 |
数量 |
| NCP349MNAETBG |
Active |
|
Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET, OVLO 5.68 V |
DFN-6 |
506BM |
1 |
Tape and Reel |
3000 |
$0.2933 |
| NCP349MNBGTBG |
Active |
|
Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET, OVLO 6.02 V |
DFN-6 |
506BM |
1 |
Tape and Reel |
3000 |
$0.2933 |
| NCP349MNBKTBG |
Active |
|
Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET, OVLO 6.4 V |
DFN-6 |
506BM |
1 |
Tape and Reel |
3000 |
$0.2933 |
| NCP349MNTBG |
Active |
|
Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET, OVLO 6.85 V |
DFN-6 |
506BM |
1 |
Tape and Reel |
3000 |
$0.2933 |
数据资料DataSheet下载
