Diodes unveils higher current power switches optimized for USB

Paul Buckley

Power Management DesignLine Europe (11/17/2009 9:20 AM ET)

Diodes Incorporated has introduced two new devices to its AP21XX power switch product line, targeted for higher current applications.

The single channel AP2101 and AP2111 provide a continuous output current capability up to 2 A and have been optimized for use in self-powered and buspowered USB and other 3-5 V hot-swap applications.

Provided in both SO-8 and MSOP-8L-EP packages, the power switches are a simple, cost effective form-fit for a wide range of consumer electronics, communications and computing products. High-side devices, the AP2101 and AP2111 offer designers the choice of active-low and active-high enable, respectively.

Characterized by a faster transient response time of just 5 us, the devices prevent unnecessary system shutdown or restart, and generally improve overall system robustness. In addition, the power switches' automatic output discharge function ensures completely controlled discharging of the output voltage capacitor. Like all other devices in the AP21XX range, the new devices provide a complete protection solution for any application, subject to heavy capacitive loads and the prospect of short circuit, and offer reverse current blocking, over-current, over-temperature and short-circuit protection, as well as controlled rise time and under-voltage lockout functionality.

To help reduce system rail power requirements and associated circuit costs, the AP2101 and AP2111 also have a tight 2.45 A current limiting tolerance. A 7 ms deglitch capability on the open drain flag output prevents false over-current reporting and requires no additional external components.

Datasheet:

AP2101 and AP2111