MAX14721–MAX14723 areadjustable overvoltage, undervoltage, and overcurrent protection devices that 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–MAX14723 embody a 76-mΩ 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. 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.
MAX14721–MAX14723 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5 x 5 mm) TQFN package and operate over a -40°C to 125°C temperature range; use them in control and automation, high-power applicationsl human /machine interfaces, industrial power systems and motion system drives.