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Overvoltage Protectors with External pFET

Provides Overvoltage Protection for up to +28V

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Overvoltage Protection Up to +28V
  • Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Overvoltage Trip Levels
  • Preset 2.44V Typical Undervoltage Trip Level
  • ±2.5% Accurate Overvoltage/Undervoltage Trip Levels
  • Low 13µA (typ) Supply Current
  • Drives External pFET
  • 20ms Adapter Debounce Time
  • Fault Flag Indicator
  • 6-Pin (1.5mm x 1.0mm) µDFN Package

Applications/Uses

  • Cell Phones
  • Digital Still Cameras
  • MP3 Players
  • PDAs and Palmtop Devices

Description

The MAX4923–MAX4926 overvoltage protection (OVP) controllers protect low-voltage systems against high-voltage faults of up to +28V with an appropriate external pFET. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, or falls below the undervoltage lockout (UVLO) threshold, these devices turn off the pFET to prevent damage to protected components and issue a flag to notify the processor of a fault condition.

The typical overvoltage trip level is set to 7.18V (MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and 4.46V (MAX4926). The undervoltage trip level is set to 2.44V (typ) for all devices.

The input (IN) is ESD protected to ±15kV HBM when bypassed to ground with a 1µF ceramic capacitor. All devices are offered in a small, 6-pin (1.5mm x 1.0mm) µDFN package and are specified over the extended -40°C to +85°C temperature range.

Simplified Block Diagram

MAX4923, MAX4924, MAX4925, MAX4926: Typical Operating Circuit MAX4923, MAX4924, MAX4925, MAX4926: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.