Positive and Negative Overvoltage Protection Circuit

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Overview

The NCP372 is an overvoltage with a reverse leakage cancellation from lithium battery. The system is both positive and negative overvoltage protected up to +28 V and down to -28 V. The wall adapter is disconnected from the system if the input voltage exceeds the overvoltage (OVLO) or undervoltage (UVLO) thresholds. At powerup, the Vout turns on 30 ms after the Vin exceeds the undervoltage threshold. Thanks to the NCP372 using an internal NMOS, the system cost and the PCB area of the application board are minimized. The NCP372 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.

  • Cell Phones, Camera Phones, Digital Still Cameras, Personal Digital Cell Phones, Camera Phones, Digital Still Cameras, Personal Digital
  • Overvoltage Protection up to 28 V
  • Overvoltage Protection down to -28 V
  • On-Chip Low RDS(on) NMOS Transistor: 135 mohm
  • Overvoltage Lockout (OVLO)
  • Undervoltage Lockout (UVLO)
  • Alert FLAG(BAR) Output
  • This is a Pb-Free Device
  • Compliance to IEC61000-4-2 (Level 4), 8.0 kV (Contact), and 15 kV (Air)
  • Soft start

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Product

Status

ECAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

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)

Pricing ($/Unit)

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NCP372MUAITXG

Last Shipments

Pb

A

H

P

LLGA-12

1

260

REEL

3000

N

-30

30

0.45

6.3

2.7

260

-40

85

Price N/A

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