Application Notes
Using Dual Current Limited TPS2140/41/50/51 For USB & Portable Applications
Texas Instruments
Published : 14 Feb 03
Description
An issue in USB and other hot-swap environments is the unpredicted inrush current during plug-in. Depending on the load capacitance the initial turn-on inrush current varies from miliamps to several amps. The high inrush current can drag the input supply voltage down to reset the upstream system. USB 1.0 and 2.0 specifications limit the inrush current by limiting the maximum input capacitance
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