Diodes has introduced a device that delivers enhanced robustness and advanced protection for the USB (Universal Serial Bus) interface in a multitude of applications, where heavy capacitive loads and short-circuits could occur when connecting devices via the USB port. The ubiquitous presence of USB ports in all computing products, and fast growing in use in consumer gadgets and communications equipment, has led to increased demands for effective electrical protection.

The AP2337 is therefore for use in not only traditional 'computing' devices such as desktops, servers, laptops, monitors and network routers, but also home entertainment equipment such as high-definition (HD) set-top boxes and flat-screen HDTVs. Fully compliant with USB 2.0 and 3.0 standards, the 1A single-channel integrated high-side power switch is optimized for both self-powered and bus-powered applications, and other 3V to 5V 'hot swapping' applications, for example where peripherals or portable gadgets are connected to, and disconnected from, a desktop or laptop computer or another consumer device without requiring a system reboot.

Protection capabilities of the AP2337 include: short-circuit response time of 5µs, preventing system shutdown and restart; built-in output-discharge functionality; 'on-resistance' of 110mOhm over 1A continuous load, minimizing; reverse current blocking; and output over-voltage protection; all in the SOT23 package.

The AP2337, which is UL recognized (pending) and IEC 60950-1 (CB scheme) certified, offers 3kV HBM (Human Body Model) and 300V MM (Machine Model) ESD (Electro-Static Discharge) protection. The device is priced at $0.10, in quantities of 1000.