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High-Current Overvoltage Protectors with Adjustable OVLO

High-Current OVP for Mid-to-Low-Tier Portable Devices

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • Protects High-Power Portable Devices
    • Wide Operating Input-Voltage Protection from +2.2V to +36V
    • 3A Continuous-Current Capability
    • Integrated 76mΩ (typ) nMOSFET Switch
  • Flexible Overvoltage Protection Design
    • Adjustable Overvoltage Protection Trip Level
    • Wide Adjustable OVLO Threshold Range from +4V to +20V
      • Preset Internal Accurate OVLO Thresholds: 6.8V±2.9% (MAX14738), 10V±3.0% (MAX14739)
  • Additional Protection Features Increase System Reliability
    • Soft-Start to Minimize In-Rush Current
    • Internal 18ms Startup Debounce
    • Thermal-Shutdown Protection
  • Minimize PCB Area
    • 6-Bump WLP (1.3mm x 0.9mm)

Applications/Uses

  • Mobile Internet Devices
  • Smartphones
  • Tablet PCs

Description

The MAX14738/MAX14739 overvoltage protection devices feature a low 76mΩ (typ) on-resistance (RON) internal FET and protect low-voltage systems against voltage faults up to +36V. When the input voltage exceeds the overvoltage threshold, the internal FET is turned off to prevent damage to the protected components.

The overvoltage protection threshold can be adjusted with optional external resistors to any voltage between 4V and 20V. With the OVLO input set below the external OVLO select voltage, the devices automatically choose the accurate internal trip thresholds. The internal overvoltage thresholds (OVLO) are preset to 6.8V (typ) (MAX14738) or 10V (typ) (MAX14739). The devices are also protected against overcurrent events by an internal thermal shutdown.

The MAX14738/MAX14739 are offered in a small, 6-bump 1.3mm x 0.9mm wafer-level package (WLP) with an exposed pad and operate over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

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.