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EUP3542
Dual Power-Distribution Switch with Fault-BlankingDescription
The EUP3542 incorporates dual 100m 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 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_typical for EUP3542 and 2.5A_typical for EUP3542-15 respectively.
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 EUP3542 eliminates any reversed current flow across
each switch when it is powered off.
The EUP3542 is available in MSOP-8 or SOP-8 package, operates over the extended (-40°C to +85°C)
temperature range.
Feature
- • Dual 100m_ 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
Application
- • 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