MAX14721/22/23 Adjustable Power Limiters

ADI's MAX14721, MAX14722, and MAX14723 adjustable overvoltage, undervoltage, and overcurrent protection devices guard systems against overcurrent, 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 +60 V, -60 V (for -60 V external pFET rating). The devices feature a low, 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. Additionally, the MAX14721, MAX14722, and MAX14723 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, enabling faster charging of large loads during startup.

The MAX14721, MAX14722, and MAX14723 also feature reverse-current and overtemperature protection. The devices are available in a 20-pin (5 mm x 5 mm) TQFN package and operate over a -40°C to +125°C temperature range.

The MAX14721EVKIT# evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the MAX14721 overvoltage, undervoltage, and overcurrent-protection device. The EV kit features an external pMOSFET and LED input/output reading. The EV kit comes with the MAX14721ATP+ installed but can also be used to evaluate the pin-compatible MAX14722 and MAX14723 devices with IC replacement of U1.