Diodes Incorporated power switch range

Offering high current handling in a 2 x 2 mm package, the family of current-limited power switches from Diodes Incorporated enables power density to be increased in the protection of multiple USB 3.0 ports used in applications such as set-top boxes, LED TVs and notebook computers.

The six single-channel devices the company has introduced have an on-resistance of only 70 mU, cover maximum continuous output currents up to 2.5 A and are being made available in the miniature footprint U-DFN2020-6 package.

For any applications subject to heavy capacitive loads and a possibility of short circuit, the switches provide a robust port protection solution, comprising reverse-current blocking, overcurrent, overtemperature, undervoltage lockout and short-circuit protection. The devices also integrate an output discharge function to ensure controlled discharging of the output capacitor. In addition, the switches’ fast short-circuit response time of 2 µs prevents any unnecessary system shutdown or restart.

With an input voltage range of 2.7 to 5.5 V, all devices are suited to 3.3 and 5 V rail systems. Supporting a maximum continuous output current of 2.5 A, the AP2501 and AP2511 are active-low and active-high enabled and are footprint compatible with the AP2301 and AP2311 devices handling a 2 A continuous output current.

The AP2401 and AP2411 are also 2 A rated power switches but provide, in addition, an output latch-off function that responds to an overcurrent excursion, enabling further optimisation of fault-behaviour management. All six power switches also feature an open-drain, overcurrent fault flag with a 7 ms deglitch time to prevent false reporting.

As well as the U-DFN2020-6 package, the devices are also offered in SO8, MSOP-8/EP and U DFN3030-8 package options. Ambient operating temperature range is -40 to +85°C.