Circuit Protection Misc Power Limiter

The MAX14722 adjustable overvoltage, under voltage, and over current protection devices guard systems against over current faults in addition to positive overvoltage and reverse-voltage faults. When used with an optional external p-channel MOSFET, the devices also protect downstream circuitry from voltage faults up to ±60V. The MAX14722 feature a low, 76mO, 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 MAX14722 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 MAX14722 also feature reverse-current and over temperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over a -40ºC to 125ºC temperature range.

• Robust, High-Power Protection Reduces SystemDowntime
  • Wide Input Range: +5.5V to +58V
  • Thermal Foldback Current-Limit Protection
  • Negative Input Tolerance to -60V with External pFET
  • Low 76mO (typ) RON
  • Reverse Current-Blocking Protection with External pFET
• Enables Safer Startup By Preventing Overheating of pFETs
  • Dual-Stage Current Limiting
  • 1.5x Startup Current (MAX14722)
• Flexible Design Enables Reuse and Less Requalification
  • Adjustable OVLO and UVLO Thresholds
  • Programmable Forward Current Limit From 0.2A to 2A with ±15% Accuracy Over Full Temperature Range
  • Normal and High-Voltage Enable Inputs (EN and \HVEN)
  • Protected External pFET Gate Drive
• Saves Board Space and Reduces External BOM Count
  • 20-Pin, 5mm x 5mm TQFN Package
  • Integrated nFET