AAT4608 Datasheet, PDF (8/10 Pages) Advanced Analogic Technologies – Current Limited Load Switch in SOT-23 Package

AAT4608
Current Limited Load Switch in SOT-23 Package
5
4
3
2
1
0
- 0 .0 5
Overload Operation
1Ω load is turned on at time = 0
Output Current
Output Voltage
0
0.05
0.1
0 .15
0 .2
0.25
Tim e ( s )
1
0.75
0.5
0.25
0
0.3
Operation in Current Limit
When a heavy load is applied to the output of the
AAT4608, the load current is limited to the value of
I_LIM determined by R_SET. See the figure "Overload
Operation". Since the load is demanding more cur-
rent than I_LIM, the voltage at the output drops. This
causes the AAT4608 to dissipate a larger than nor-
mal quantity of power, and its die temperature to
increase. When the die temperature exceeds an
over temperature limit, the AAT4608 will shut down
until is has cooled sufficiently, at which point it will
startup again. The AAT4608 will continue to cycle
on and off until the load is removed or power is
removed.
Reverse Voltage
The AAT4608 is designed to control current flowing
from IN to OUT. If a voltage is applied to OUT which
is greater than the voltage on IN, large currents may
flow. This could cause damage to the AAT4608.
8
4608.2001.10.0.9