Eutech EUP3546 Dual power-distribution switch with fault-blanking Datasheet

EUP3546
Dual Power-Distribution Switch
with Fault-Blanking
DESCRIPTION
FEATURES
The EUP3546 incorporates dual 95mΩ 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.
APPLICATIONS
Typical Application Circuit
Figure 1.
DS3546
Ver1.0
Oct. 2009
Dual 95mΩ 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
1
High-Side Power Protection Switch
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