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

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