NCP349: Positive Overvoltage Protection Circuit 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 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.

特性
  • 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
  • Package DFN 1.6 x 2.0 mm
应用
  • Cell Phones, Camera Phones, Digital Still Cameras, PDA, and MP3 Players
数据表 (1)
Document TitleDocument ID/SizeRevisionRevision Date
Positive Overvoltage Protection Controller with Internal Low Ron NMOS FET and Status FlagNCP349/D (300.0kB)3
封装图纸 (1)
Document TitleDocument ID/SizeRevision
DFN6 2x1.6, 0.5P506BM (59.2kB)O
产品订购型号
产品状况Compliance封装MSL*容器预算价格 (1千个数量的单价)
NCP349MNAETBGActivePb-free Halide freeDFN-6506BM1Tape and Reel3000$0.2933
NCP349MNBGTBGActivePb-free Halide freeDFN-6506BM1Tape and Reel3000$0.2933
NCP349MNBKTBGActivePb-free Halide freeDFN-6506BM1Tape and Reel3000$0.2933
NCP349MNTBGActivePb-free Halide freeDFN-6506BM1Tape and Reel3000$0.2933
订购产品技术参数
ProductVCC Min (V)VCC Max (V)P(AV) Max (W)VIT+ Typ (V)VIT Typ (V)IDDH Max (µA)TA Min (°C)TA Max (°C)
NCP349MNAETBG1.2280.0655.682.950.25-4085
NCP349MNBGTBG1.2280.0656.023.250.25-4085
NCP349MNBKTBG1.2280.0656.43.250.25-4085
NCP349MNTBG1.2280.0656.852.950.25-4085
Positive Overvoltage Protection Controller with Internal Low Ron NMOS FET and Status Flag (300.0kB) NCP349
DFN6 2x1.6, 0.5P NCP349