Circuit Protection Misc Power Limiter

The MAX14721 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 p-channel MOSFET, the devices also protect downstream circuitry from voltage faults up to ±60V. The MAX14721 feature a low, 76m?, 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 MAX14721 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 MAX14721 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5mm x 5mm) TQFN package and operate over a -40°C to 125°C temperature range.

• Robust, High-Power Protection Reduces System Downtime
• Wide Input Range: +5.5V to +58V
• Thermal Foldback Current-Limit Protection
• Negative Input Tolerance to -60V with External pFET
• Low 76m? (typ) RON
• Reverse Current-Blocking Protection with External pFET
• Enables Safer Startup By Preventing Overheating of FETs
• Dual-Stage Current Limiting
• 1.0x Startup Current (MAX14721)
• 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