EUP3545/A
USB Power-Distribution Switch
with Fault Blanking
DESCRIPTION
The EUP3545/A is an incorporated 100m P-channel
MOSFET power-distribution switch for self-powered
and bus-powered Universal Serial Bus (USB)
applications.
When the output load exceeds the current-limit
threshold or a short is present, the device limits the
output current to safe level by switching into a
constant-current limit mode with fold back, pulling the
over-current (
OC
) logic output low. When continuous
heavy overloads or short-circuits increase the power
dissipation in the switch, causing the junction
temperature to rise, a thermal protection circuit
shutdown the switch to prevent damage. Internal Under
Voltage Lock-Out (UVLO) circuitry ensures that the
switch remains off until valid input voltage is present.
FEATURES
100m POWER MOSFET
Operating Range : 2.7V to 5.5V
Under Voltage Lockout
11µA Quiescent Current
1µA Shutdown Current
Logic Level Enable Pin, Available with
Active-Low or Active-High Version
No Reverse Current when Power Off
Fault Blanking Open-Drain Over-Current Flag
Output (
OC
)
Output Shutdown Pull-low Resistor
Available in SOT23-5,MSOP-8 and MSOP-8
(EP) Packages
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
UL Listed-File No. E334299
OC
is open-drain output which is asserted when
over-current or over-temperature event 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 EUP3545/A eliminates any
reversed current flow across the switch when it is
powered off.
The EUP3545/A are available in SOT23-5, 8-pin
MSOP and 8-pin MSOP(EP) packages, operates over
the extended (-40°C to +85°C) temperature range.
APPLICATIONS
USB Ports and Self-Powered Hubs
USB Bus-Powered Hubs
Hot Plug-In Power Supplies
General Purpose High Side Switch Applications
Typical Application Circuit
Figure 1.
DS3545/A Ver1.4 Sep. 2011
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
