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Overvoltage Protection Controllers with Current Limit in TDFN

Overvoltage trip level, saves space

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Overvoltage Protection Up to 28V
  • Preset Overvoltage Trip Level
    5.6V (MAX4881/MAX4883)
    4.5V (MAX4882/MAX4884)
  • Internal Current-Limited Switch
  • 1.1A (MAX4881/MAX4882)
    0.7A (MAX4883/MAX4884)
  • Drives Low-Cost n-Channel MOSFET
  • Internal 50ms Startup Delay
  • Overvoltage Fault Active-Low OV Indicator
  • Current-Limit Fault Active-Low FLAGI Indicator
  • Undervoltage Lockout
  • Thermal Shutdown Protection
  • Tiny 10-Pin TDFN Package
  • Applications/Uses

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

    Description

    The MAX4881–MAX4884 overvoltage protection (OVP) controllers with built-in current-limited switch, protect low voltage systems against voltages of up to 28V. When the input voltage exceeds the overvoltage trip level of 5.6V (MAX4881/MAX4883) or 4.5V (MAX4882/MAX4884), the external n-channel MOSFET is turned off to prevent damage to the protected components. An undervoltage/overvoltage flag indicator (OV-bar) notifies the processor that an undervoltage/overvoltage fault condition is present.

    The MAX4881/MAX4882 feature an internal 1.1A current-limited switch, while the MAX4883B/MAX4883C/MAX4884B/MAX4884C include an internal 0.7A current-limited switch. When the load current is at the current limit for longer than the blanking time, the switch of the MAX4881/MAX4882/MAX4883B/MAX4884B latches off and does not turn back on until Active-Low EN, CB, or IN is cycled. A current-limit flag (Active-Low FLAGI) asserts to indicate a current fault condition.

    The MAX4883C/MAX4884C limit the current to 0.7A indefinitely until the thermal protection trips. An overcurrent flag output asserts to indicate a current fault condition after the blanking time has elapsed.

    The MAX4881–MAX4884 have a control input (CB) that is used to turn on and off the internal current-limited switch. Other features include a shutdown function (Active-Low EN) to disable the external n-channel MOSFET, and a built-in startup delay to allow the adapter voltage to settle down before turning on the MOSFET.

    The MAX4881–MAX4884 is offered in a space-saving 10-pin TDFN package and is specified for operation over the extended -40°C to +85°C temperature range.

    Simplified Block Diagram

    MAX4881, MAX4882, MAX4883, MAX4884, MAX4893B: Typical Operating Circuit Block Diagram MAX4881, MAX4882, MAX4883, MAX4884, MAX4893B: Typical Operating Circuit Block Diagram 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.