MAX14691

High-Accuracy, Adjustable Power Limiter

Industry's First Dynamic Power Limiter with Thermal Controlled Current Foldback


Please check latest availability status for a specific part variant.

Description

The MAX14691–MAX14693 adjustable overvoltage, undervoltage, and overcurrent protection devices guard systems against overcurrent faults in addition to positive overvoltage and reverse-voltage faults. When used with an optional external pMOSFET, the devices also protect downstream circuitry from voltage faults up to +58V, -60V (for -60V external pFET rating). The devices feature a low, 31mΩ, on-resistance integrated FET.

During startup, the devices are designed to charge large capacitances on the output in a continuous mode for applications where large reservoir capacitors are used on the inputs to downstream devices.

Additionally, the devices feature a dual-stage, current-limit mode in which the current is continuously limited to 1x, 1.5x, and 2x the programmed limit, respectively, for a short time after startup. This enables faster charging of large loads during startup.

The MAX14691–MAX14693 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over the -40°C to 125°C temperature range.

MAX14691, MAX14692, MAX14693: Typical Application Circuit MAX14691, MAX14692, MAX14693: Typical Application Circuit Enlarge+

Key Features

  • Robust, High-Power Protection Reduces System Downtime
    • Wide Operating Input Range: +5.5V to +58V
    • -60V Negative Input Tolerance (for -60V External pFET Rating)
    • Low 31mΩ (typ) RON
    • Reverse Current-Blocking Protection with External pFET
  • Enables Fast Startup and Brownout Recovery
    • Thermal Foldback Current-Limit Protection
    • Dual-Stage Current Limiting
      • 1.0x Startup Current (MAX14691)
      • 1.5x Startup Current (MAX14692)
      • 2.0x Startup Current (MAX14693)
  • Flexible Design Enables Reuse and Less Requalification
    • Adjustable OVLO and UVLO Thresholds
    • Programmable Forward Current Limit From 0.6A to 6A with ±15% Accuracy Over Full Temperature Range
    • Normal and High-Voltage Enable Inputs (EN and Active-Low HVEN)
    • Protected External pFET Gate Drive
  • Saves Board Space and Reduces External BOM Count
    • 20-Pin 5mm x 5mm TQFN Package
    • Integrated nFET

Applications/Uses

  • Control and Automation
  • High-Power Applications
  • Human Machine Interfaces
  • Industrial Power Systems
  • Motion System Drives

See parametric specs for Overvoltage/Overcurrent Protectors with Internal MOSFETs (27)


Part NumberChannelsVIN
(V)
VIN
(V)
Internal Pwr. MOSFETsRON
(mΩ)
Current Limit
(A)
Current Limit
(A)
Current Limit Accuracy
(%)
Fault ResponseReverse Current Protect.Fault IndicatorOper. Temp.
(°C)
Package/PinsBudgetary
Price
minmaxtypminmaxSee Notes
MAX14691 15.558NMOS310.6610LatchoffYesYes-40 to +125
TQFN-CU/20
$2.92 @1k
MAX14692 
TQFN-CU/20
MAX14693 
TQFN-CU/20

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.

MAX14691EVKIT: Evaluation Kit for the MAX14691–MAX14693
Product Reliability Reports: MAX14691.pdf 
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.

Quality Management System >
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Related Resources


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