AP1184K5 DIODES [Diodes Incorporated], AP1184K5 Datasheet - Page 7

• Manufacturer Part Number: AP1184K5
• Description: 4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR FIXED-MODE REGULATOR
• Manufacturer: DIODES [Diodes Incorporated]

Functional Descriptions
Note:
AP1184 Rev. 1
Assuming, the following conditions:
V
V
V
I
Calculate the maximum power dissipation using the following equation:
P
P
Using table below select the proper package and the amount of copper board needed.
out
TO263-3L
out
in
ctrl
d
d
Package
SOP-8L
= I
= 2 * (3.3-2.5) + (2/60) * (5-2.5) = 1.68W
= 3.3V
6. Above table is based on the maximum junction temperature of 135
= 2A DC Avg.
= 2.5V
= 5V
As shown in the above table, any of the two packages will do the job. For low cost applications the SOP-8L package is recommended.
out
* ( V
in
- V
Pad Size-1.4”X1.4”
out
Copper Area
) + ( I
1.0” X 1.0”
out
/60) * ( V
ctrl
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
- V
( Continued )
out
θ
JA
)
www.diodes.com
25-45
(
65
o
C/W)
7 of 12
o
Max Pd (T
C.
2.4W-4.4W
1.7W
A
= 25
o
C)
FIXED-MODE REGULATOR
Max Pd (T
2.0W-3.6W
1.4W
A
= 45
©
AP1184
Diodes Incorporated
MARCH
o
C)
2007