NCP348: Positive Overvoltage Protection Circuit with Internal Low Ron NMOS FET and Status Flag

The NCP348 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 NCP348 is able to instantaneously disconnect the output from the input, due to integrated Low Ron Power NMOS (80 mΩ, if the input voltage exceeds the overvoltage threshold (6.4 V) or undervoltage threshold, of 3.25 V (UVLO).At powerup (EN(BAR) pin = low level), the Vout turns on 50 ms after the Vin exceeds the undervoltage threshold.The NCP348 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
  • Overvoltage Protection up to 28 V
  • On-Chip Low RDS(on) NMOS Transistor: 80 mΩ
  • Internal Charge Pump
  • 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
Applications
  • Cell Phones, Camera Phones, Digital Still Cameras, Personal Digital Applicaitons, and MP3 Players
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Positive Overvoltage Protection Controller with Internal Low Ron NMOS FET and Status FlagNCP348/D (482.0kB)7
Package Drawings (2)
Document TitleDocument ID/SizeRevision
LLGA10, 2.5x2.5, 0.5P513AG (45.3kB)A
WDFN10, 2.5x2 mm, 0.5P516AA (43.1kB)C
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP348GEVB Bill of MaterialsNCP348GEVB_BOM.PDF (55.0kB)0
NCP348GEVB Gerber Layout Files (Zip Format)NCP348GEVB_GERBER.ZIP (30.0kB)0
NCP348GEVB SchematicNCP348GEVB_SCHEMATIC.PDF (23.0kB)0
NCP348GEVB Test ProcedureNCP348GEVB_TEST_PROCEDURE.PDF (35.0kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP348GEVBActivePb-freePositive OVP Controller Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP348AEMTTBGActivePb-free Halide freeWDFN-10516AA1Tape and Reel3000$0.3333
NCP348AEMTTXGLast ShipmentsPb-free Halide freeWDFN-10516AA1Tape and Reel10000
NCP348AEMUTBGLast ShipmentsPb-free Halide freeLLGA-10513AG1Tape and Reel3000
NCP348MTTBGActivePb-free Halide freeWDFN-10516AA1Tape and Reel3000$0.3333
NCP348MTTXGLast ShipmentsPb-free Halide freeWDFN-10516AA1Tape and Reel10000
Specifications
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)
NCP348AEMTTBG1.2280.486.023.25250-4085
NCP348MTTBG1.2280.486.43.25250-4085
Positive Overvoltage Protection Controller with Internal Low Ron NMOS FET and Status Flag (482.0kB) NCP348
NCP348GEVB BOM NCP348GEVB
NCP348GEVB GERBER NCP348GEVB
NCP348GEVB SCHEMATIC NCP348GEVB
NCP348GEVB TEST PROCEDURE NCP348GEVB
LLGA10, 2.5x2.5, 0.5P NCP348
WDFN10, 2.5x2 mm, 0.5P NCP348
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