Diodes Inc - Higher current power switches optimized for USB

17th November 2009
ES Admin
For higher current applications Diodes Incorporated has added two new devices to its AP21XX power switch product line. The single channel AP2101 and AP2111 provide a continuous output current capability up to 2A and have been optimized for use in self-powered and bus-powered USB and other 3-5V hot-swap applications.
Provided in both SO-8 and MSOP-8L-EP packages, the power switches are a very 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 fast transient response time of just 5µs, the devices prevent unnecessary system shutdown/restart and generally improve overall system robustness. In addition, the power switches' automatic output discharge function ensures a quick and well defined discharge of the output voltage capacitor.

Like all other devices in the AP21XX family, the new devices provide a complete protection solution for applications subject to heavy capacitive loads and the prospect of short circuits. The AP21XX devices 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 very tight, 2.45A current limiting tolerance. A 7ms deglitch capability on the open drain flag output prevents false over-current reporting and requires no additional external components.

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