Torex Semiconductor Ltd has launched a load switch IC with ideal diode function – the XC8110/XC8111 series.
The series is load switch ICs that reproduce ideal diodes and provided with functions including chip enable, overcurrent limit, inrush current limit, and thermal shutdown.
Since this IC is provided with an ideal diode function, compared to Schottky barrier diodes, which are commonly used to stop backflow, the voltage corresponding to VF is lowered to about 1/20 and achieving low loss. Despite the low VF of 20mV, the backflow current from VOUT to VIN is 0, which is precisely the ideal diode characteristic. With these features, the output OR circuit can be easily realised and reduce battery consumption for backup purposes.
The overcurrent limit function utilises constant-current limit and foldback current limit. By adopting the foldback method, the short-circuit current can be controlled to 50mA, enabling it to be employed safely even in the event of a short-circuit. Also, the thermal shutdown function can stop IC failure caused by heat.