NCP382LMN10AATXG ON Semiconductor, NCP382LMN10AATXG Datasheet - Page 8

• Manufacturer Part Number: NCP382LMN10AATXG
• Description: IC DISTR LOAD SWITCH 2CH 8DFN
• Manufacturer: ON Semiconductor

Specifications of NCP382LMN10AATXG

• Lead Free Status / Rohs Status: Compliant

Overview
switches designed to protect the input supply voltage in case
of heavy capacitive loads, short circuit or over current. In
addition, the high side MOSFETs are turned off during
undervoltage or thermal shutdown condition. Thanks to the
soft start circuitry, NCP382 is able to limit large current and
voltage surges.
Overcurrent Protection
when the output current is above the I
Depending on the load, the output voltage is decreased
accordingly.
− In case of hot plug with heavy capacitive load, the
− In case of overload, the current is limited to the I
− In case of short circuit or huge load, the current is
The NCP382 is a dual high side power distribution
NCP382 switches into a constant current regulation mode
output voltage is brought down to the capacitor voltage.
The NCP382 will limit the current to the I
value until the charge of the capacitor is completed.
value and the voltage value is reduced according to the
load by the following relation:
limited to the I
short condition is removed. If the output remains
shorted or tied to a very low voltage, the junction
temperature of the chip exceeds T
device enters in thermal shutdown (MOSFET is
turned−off).
I
V
I
OCP
OUTX
OUTX
V
I
OUTX
OUTX
Figure 6. Heavy Capacitive Load
V
OCP
OUTX
Figure 7. Overload
value within T
+ R
LOAD2
I
OCP
capacitor charge
I
OCP
Drop due to
x R
DET
SDOCP
I
OCP
LOAD
time until the
OCP
value and the
FUNCTIONAL DESCRIPTION
OCP
threshold.
threshold
OCP
(eq. 1)
http://onsemi.com
8
Then, the device enters in timer regulation mode, described
in 2 phases:
− Off−phase: Power MOSFET is off during T
− On−phase: regulation current mode during T
high thermal dissipation (in case of short circuit for
example) within temperature operating condition.
current condition is removed or enable pin is toggled.
different applications. Please contact our On Semiconductor
representative for availability.
FLAG Indicator
during overcurrent or overtemperature conditions. When an
overcurrent fault is detected on the power path, FLAG pin
is asserted low at the end of the associate deglitch time
(TFOCP). Thanks to this feature, the FLAG pin is not tied
low during the charge of a heavy capacitive load or a voltage
transient on output. The FLAG pin remains low until the
fault is removed. Then, the FLAG pin goes high at the end
of T
Undervoltage Lock−out
circuitry, the output remains disconnected from input until
V
hysteresis witch provides noise immunity to transient
condition.
Thermal Sense
temperature exceeds T
part from turning on until the die temperature cools at
TRSD.
IN
The timer regulation mode allows the device to handle
NCP382 stays in on−phase/off−phase loop until the over
Remark: other regulation mode can be available for
The FLAG pin is an open−drain MOSFET asserted low
Thanks to a built−in under voltage lockout (UVLO)
Thermal shutdown turns off the power MOSFET if the die
the die temperature to drop.
current is regulated to the I
FGL
voltage is above V
V
I
OUTX
OUTX
Figure 8. Short−Circuit
Regulation
Threshold
Thermal
I
OCP
SD
UVLO
. A built-in hysteresis prevents the
T
OCP
. This circuit has a V
OCP
level.
T
REG
Regulation
Timer
Mode
OCP
REG.
to allow
The
HYST