STMicroelectronics reveals integrated hot-swap and ideal-diode controller
Summary
The ideal-diode controller drives an external MOSFET replacing a Schottky diode conventionally used for reverse-input protection and output-voltage holdup. When a reverse-voltage event occurs, in case of faults like power source failure, brownout or input short-circuit, turning off the MOSFET blocks the associated reverse-current transients. The ideal-diode controller circuit also provides power ORing, to switch between a main and backup battery to ensure uninterrupted supply to safety-critical equipment such as autonomous driving and advanced driver assistance systems (ADAS). The features are packaged within a 5 x 5mm VFQFN-32 footprint, saving PCB space, and minimizing demand for external components. Operating from a 4V-65V supply voltage, and with 25µA quiescent current, the STPM801 withstands automotive electrical hazards and minimizes battery drain when the vehicle is turned off.
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