MAX14672

Bidirectional Current-Blocking, High-Input Overvoltage Protectors with Adjustable OVLO

OVP Enables Multiple, Faster Charging Power Sources with High Voltage


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Description

The MAX14670–MAX14673 provide protection to valuable consumer circuits against positive voltage faults up to +28VDC. An internal clamp also protects the devices from surges up to +100V. The device is able to disconnect the system from its output terminal when wrong input conditions are detected.

The MAX14670–MAX14673 overvoltage protection devices feature low 65mΩ (typ), WLP package on-resistance (RON) internal FETs, effectively minimizing the voltage drop across the device. 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 5V and 22V. The devices automatically choose the accurate internal trip thresholds when the overvoltage lockout input (OVLO) is set lower than the external OVLO select voltage. The internal OVLO are preset to typical 6.8V (MAX14670), 15.5V (MAX14671), 5.825V (MAX14672), or 22V (MAX14673).

The MAX14670–MAX14673 feature reverse bias blocking capability. Unlike other overvoltage protectors, when the MAX14670–MAX14673 are disabled, the voltage applied to OUT does not feed back into IN. These devices also feature an OTG enable pin that allows OUT voltage to supply IN. The MAX14670–MAX14673 also have thermal shutdown protection against over load conditions.

The MAX14670–MAX14673 are specified over the extended -40°C to +85°C temperature range. The MAX14670/MAX14671 are available in a 15-bump WLP package and the MAX14672/MAX14673 are available in a 10-pin TDFN package.

MAX14670, MAX14671, MAX14672, MAX14673: Functional Diagram MAX14670, MAX14671, MAX14672, MAX14673: Functional Diagram Enlarge+

Key Features

  • Protect High-Power Portable Devices
    • Wide Operating Input Voltage Protection from +3V to +28V
    • +100V Surge Capability
    • 4.5A Continuous Current Capability (WLP Package)
    • Integrated 65mΩ (typ) n-Channel MOSFET Switch (WLP Package)
  • Flexible Overvoltage Protection Design
    • Wide +5V to +22V Adjustable OVLO Threshold Range
    • Active-Low ACOK and ACOK Indicate Input is in Range
    • OTG Enable Allows OUT to Supply IN
    • Preset Accurate Internal OVLO Thresholds:
      • 6.8V ±3% (MAX14670)
      • 15.5V ±3% (MAX14671)
      • 5.825V ±3% (MAX14672)
      • 22V ±3% (MAX14673)
  • Additional Protection Features Increase System Reliability
    • OUT-IN Reverse Bias Blocking Capability
    • Soft-Start to Minimize Inrush Current
    • Internal 15ms Startup Debounce
    • Thermal Shutdown Protection
  • Space Saving
    • 15-Bump, 1.6mm x 2.1mm, WLP Package
    • 10-Pin, 3mm x 3mm, TDFN Package

Applications/Uses

  • Charging USB Hosts
  • e-Readers
  • PC Notebooks
  • Smart Phones
  • Tablets

See parametric specs for Overvoltage Protection Controllers (74)


Part NumberChannelsVIN
(V)
VIN
(V)
Over Voltage Trip Level
(V)
Over Volt. FlagtGATE (On)
(ms)
tGATE (Off)
(µs)
Package/PinsBudgetary
Price
minmaxSee Notes
MAX14670 12.2296.8Open-Drain1.51
WLP/15
$0.81 @1k
MAX14671 15.5
WLP/15
MAX14672 5.825
TDFN/10

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX14670EVKIT: Evaluation Kit for the MAX14670 and MAX14671
Request Reliability Report for: MAX14672 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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