AIC1747 AIC [Analog Intergrations Corporation], AIC1747 Datasheet - Page 13

• Manufacturer Part Number: AIC1747
• Description: 300mA Linear Regulator With Bypass Pin
• Manufacturer: AIC [Analog Intergrations Corporation]

APPLICATION
INPUT-OUTPUT CAPACITORS
Linear regulators require input and output
capacitors to maintain stability. Input capacitor at
1µF with 1uF output capacitor is recommended.
POWER DISSIPATION
The AIC1747 obtains thermal-limiting circuitry,
which is designed to protect the device against
overload
condition,
temperature must not be exceeded. It is
important to pay more attention in thermal
resistance. It includes junction to case, junction
to ambient. The maximum power dissipation of
AIC1747 depends on the thermal resistance of
its case and circuit board, the temperature
difference between the die junction and am
a
temperature rise is greatly affected by the
m
b
W
ir, and the rate of airflow. The rate of
oard material, and the ambient temperature.
ounting pad configuration on the PCB, the
hen the IC mounting with good thermal
condition.
maximum
IN
For
rating
FORMATION
continuous
of
junction
bient
load
conductivity is used, the junction tempera
will be low even when large power
applies.
The power dissipation a
P = I
The maximum power dissipation is:
Where T
temperature (150°C), and T
temperature suitable in application.
As a general rule, the lower temperature is, the
better reliability of the device is. So the PCB
mounting pad should provide maximum therm
conductivity to maintain low device temperatur
GND pin performs a dual function for provid
an electrical connection to ground and
channeling heat away. Therefore, connecting
th
g
d
P
round plane would increase the power
issipation and reduce the device temperature.
MAX
e GND pin to ground with a large pad or
OUT
=
(T
(V
J-max
- J
IN
Rθ
max
-V
is the maximum allowable junction
JA
OUT
-
T
A
).
)
cross the device is
A
is the ambient
AIC1747
dissipation
ing
13
ture
e.
al