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Smart load switch boasts rapid turn-off fault protection

12 Aug 2014

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Alpha and Omega Semiconductor Ltd (AOS) has announced a high current smart load switch with rapid turn-off fault protection and current monitoring. According to the company, the AOZ1363 has an operating input voltage range from 5-16V and is capable of supplying up to 6A of continuous current. A low on-resistance of 23mΩ in a thermally enhanced 3 x 3mm DFN package makes the AOZ1363 ideal for space-constrained applications that require circuit protection such as the latest notebook PCs, hot swap supplies and micro servers, noted AOS.

The AOZ1363 integrates several smart functions to safely and effectively manage and monitor loads. The device features an internal current limiting circuit, which protects the system from sourcing excessive load currents, in conjunction with a thermal protection function that limits excessive power dissipation. Externally programmable soft-start circuitry controls inrush current from highly capacitive loads during hot-plug events. The device can communicate load information in real time through the current monitoring pin (ISEN) with an accuracy window of 10 per cent at a specified load current of 3A, added the company.


The AOZ1363 can detect over-current fault conditions and execute a rapid power-down within a delay time of 100ns maximum. It also features an input overvoltage protection which allows the device to power-down when the power input voltage exceeds 19V. Efficiency is not sacrificed as the AOZ1363 features a low quiescent current of 400uA that can be further reduced to less than 10uA in shutdown mode.

The AOZ1363 is immediately available in production quantities with a lead-time of 12 weeks. The unit price of 1,000 pieces is $3.75.

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