Digi-Key – Versatile single-channel current-limited USB power distribution switch (296-29759-2-ND)Jun 28 2012 - Power [More Power Articles]
Intended for applications such as USB where heavy capacitive loads and short-circuits are likely to be encountered, Digi-Key can now supply the Texas Instruments (TI) TPS2051C power-distribution switch family.
The family offers multiple devices with fixed current-limit thresholds for applications between 0.5A and 2A. The TPS2051C family limits the output current to a safe level by operating in a constant-current mode when the output load exceeds the current-limit threshold. This provides a predictable fault current under all conditions.
The fast overload response time eases the burden on the main 5V supply to provide regulated power when the output is shorted. The power-switch rise and fall times are controlled to minimize current surges during turn-on and turn-off.
Applications include USB ports / hubs, laptops, desktops, high-definition digital TVs, set-top boxes and short-circuit protection.More news from Digikey