EUP3545 EUTECH | Alldatasheet
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Technical content
DS3545/A Ver1.4 Sep. 2011 USB Power-Distribution Switch with Fault Blanking
DESCRIPTION
The EUP3545/A is an incorporated 100mΩ P-channel MOSFET power-distribution switch for self-powered and bus-powered Universal Serial Bus (USB) applications. When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to safe level by switching into a constant-current limit mode with fold back, pulling the over-current ( OC ) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shutdown the switch to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switch remains off until valid input voltage is present. OC is open-drain output which is asserted when over-current or over-temperature event occurs. A 8ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The EUP3545/A eliminates any reversed current flow across the switch when it is powered off. The EUP3545/A are available in SOT23-5, 8-pin MSOP and 8-pin MSOP(EP) packages, operates over the extended (-40°C to +85°C) temperature range. Typical Application Circuit
FEATURES
/circle6 100m Ω POWER MOSFET /circle6 Operating Range : 2.7V to 5.5V /circle6 Under V oltage Lockout /circle6 11µA Quiescent Current /circle6 1µA Shutdown Current /circle6 Logic Level Enable Pin, Available with Active-Low or Active-High Version /circle6 No Reverse Current when Power Off /circle6 Fault Blanking Open-Drain Over-Current Flag Output ( OC ) /circle6 Output Shutdown Pull-low Resist or /circle6 Available in SOT23-5,MSOP-8 and MSOP-8 (EP) Packages /circle6 RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free /circle6 UL Listed-File No. E334299
APPLICATIONS
/circle6 USB Ports and Self-Powered Hubs /circle6 USB Bus-Powered Hubs /circle6 Hot Plug-In Power Supplies /circle6 General Purpose High Side Switch Applications Figure 1.