The MAX1558ETB+T is a dual, 3mm x 3mm, 1.2A/programmable-current USB switch with auto-reset in 10 pin TDFN package. The auto-reset latches the switch off, if it is shorted for more than 20ms and saves system power. The shorted output is then tested to determine when the short is removed to automatically restart the channel. Each channel delivers up to 1.2A and meets all IEC specifications for USB ports. Low quiescent supply current (45μA) and standby current (3μA) conserve battery power in portable applications. The MAX1558 safety features ensure that the USB port is protected. Built-in thermal-overload protection limits power dissipation and junction temperature. Accurate, programmable current-limiting circuitry protects the input supply against both overload and short circuit conditions. The MAX1558 also feature reverse-current protection circuitry to block current flow from the output to the input when the switches are off. The MAX1558 is enabled with an active-low signal.
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