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发布者:来自网络 发布时间:2014/7/24 阅读:6411次    关键字: DC-DC
EUP3546-Dual Power-Distribution Switch


EUP3546-Dual Power-Distribution Switch with Fault-Blanking DataSheet

DESCRIPTION

      The EUP3546 incorporates dual 95m_ 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.

FEATURES

•  Dual 95m_ High-Side MOSFET
•  1A Current Limits with Fold-back
•  Operating Range:2.7V to 5.5V
•  300µS Typical Rise Time
•  Under voltage Lockout
•  15µA Quiescent Supply Current
•  1µA Shutdown Supply Current
•  Logic Level Enable Pin, Available with Active-Low Version
•  No Reverse Current when Power Off
•  Open-Drain Over-Current Flag Outputs with fault-blanking
•  Available in SOP-8 Package
•  RoHS Compliant and 100% Lead(Pb)-Free Halogen-Free

APPLICATIONS

•  High-Side Power Protection Switch
•  USB Power Management
•  USB Host and Self-Powered Bubs
•  USB Bus-Powered Hubs
•  Hot Plug-In Power Supplies
•  Battery-Charger Circuits
•  Short-Circuit Protections

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