EUP3546 EUTECH | Alldatasheet
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Technical content
DS3546 Ver1.0 Oct. 2009 Dual Power-Distribution Switch with Fault-Blanking
DESCRIPTION
The EUP3546 incorporates dual 95m Ω P-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. When either output load exceeds the current-limit threshold or a short is present, the device limits the outputs current to a safe level by switching into a constant-current limit mode with fold back, pulling the over-current (OCB(s)) logic output low. When continuous heavy overloads or short-circuits increase the power dissipation in the switches, causing the junction temperature to raise, a thermal protection circuit shutdown the switches to prevent damage. Internal Under Voltage Lock-Out (UVLO) circuitry ensures that the switches remain off until valid input voltage is present. Each power switch is designed to set current limit at 1A typically. OCB(s) are open-drain outputs which are asserted when over-current 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 EUP3546 eliminates any reversed current flow across each switch when it is powered off. The EUP3546 is available in 8-pin SOP package, operates over the extended (-40 to℃ +85 ) temperature ℃ range. Typical Application Circuit
FEATURES
/circle6 Dual 95mΩ High-Side MOSFET /circle6 1A Current Limits with Fold-back /circle6 Operating Range:2.7V to 5.5V /circle6 300µS Typical Rise Time /circle6 Under voltage Lockout /circle6 15µA Quiescent Supply Current /circle6 1µA Shutdown Supply Current /circle6 Logic Level Enable Pin, Available with Active-Low Version /circle6 No Reverse Current when Power Off /circle6 Open-Drain Over-Current Flag Outputs with fault-blanking /circle6 Available in SOP-8 Package /circle6 RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free
APPLICATIONS
/circle6 High-Side Power Protection Switch /circle6 USB Power Management /circle6 USB Host and Self-Powered Bubs /circle6 USB Bus-Powered Hubs /circle6 Hot Plug-In Power Supplies /circle6 Battery-Charger Circuits /circle6 Short-Circuit Protections Figure 1.