AAT4610AIJS-1-T1 AAT [Advanced Analog Technology, Inc.], AAT4610AIJS-1-T1 Datasheet - Page 8

• Manufacturer Part Number: AAT4610AIJS-1-T1
• Description: Current Limited Load Switch
• Manufacturer: AAT [Advanced Analog Technology, Inc.]

Application Information
Setting Current Limit
In most applications, the variation in I
taken into account when determining R
variation is due to processing variations from part
to part, as well as variations in the voltages at IN
and OUT, plus the operating temperature. See
charts "Current Limit vs. Temperature" and "Output
Current vs. V
add up to a ±25% tolerance (see I
in Electrical Characteristics section). Figure 1 illus-
trates a cold device with a statistically higher cur-
rent limit and a hot device with a statistically lower
current limit, both with R
the chart, "R
with an R
actual current limit will be at least 0.525A and no
greater than 0.880A.
Functional Block Diagram
8
SET
SET
of 10.5kΩ, this figure shows that the
OUT
vs. I
." Together, these three factors
ON (ON)
LIM
" indicates an I
SET
IN
equal to 10.5kΩ. While
LIM
Lockout
Voltage
Under-
specification
LIM
SET.
LIM
must be
The I
of 0.7A
Reference
1.2V
LIM
GND
Over-Temperature
To determine R
drawn by the load and multiply it by 1.33 (typical
I
rent limit value. Next, refer to "R
find the R
limit value. Choose the largest resistor available
that is less than or equal to it. For greater precision,
the value of R
LIM
Protection
0.8
0.6
0.4
0.2
1.2
0
= minimum I
1
Figure 1: Current Limit Using 10.5kΩ Ω .
0
Current
Limit
Current Limited Load Switch
0.525A
SET
0.88A
that corresponds to the typical current
SET
1
SET,
LIM
may also be calculated using the
OUT
start with the maximum current
SET
/ 0.75). This is the typical cur-
Device with high current limit at -40°C
Device with low current limit at 85°C
2
V
OUT
R
(V)
SET
AAT4610A
3
SET
Ω
4610A.2006.9.1.3
vs. I
4
LIM
" and
5