Ap1184, Functional descriptions – Diodes AP1184 User Manual
Page 7

AP1184
4A ULTRA LOW DROPOUT POSITIVE ADJUSTABLE OR
FIXED-MODE REGULATOR
AP1184 Rev. 5
7 of 12
SEPTEMBER 2008
www.diodes.com
©
Diodes Incorporated
Functional Descriptions
(Continued)
Assuming, the following conditions:
V
out
= 2.5V
V
in
= 3.3V
V
ctrl
= 5V
I
out
= 2A DC Avg.
Calculate the maximum power dissipation using the following equation:
P
d
= I
out
* ( V
in
- V
out
) + ( I
out
/60) * ( V
ctrl
- V
out
)
P
d
= 2 * (3.3-2.5) + (2/60) * (5-2.5) = 1.68W
Using table below select the proper package and the amount of copper board needed.
Package
Copper Area
θ
JA
(
o
C/W)
Max Pd (T
A
= 25
o
C)
Max Pd (T
A
= 45
o
C)
TO263-5L Pad
Size-1.4”X1.4”
25-45
2.4W-4.4W
2.0W-3.6W
Notes: 6. Above table is based on the maximum junction temperature of 135
o
C.
As shown in the above table, any of the two packages will do the job.
- PDS3200 (5 pages)
- PDS340 (5 pages)
- PDS340Q (5 pages)
- PDS360 (5 pages)
- PDS360Q (5 pages)
- PDS4150 (4 pages)
- PDS3100Q (5 pages)
- PDS3100 (5 pages)
- PDS1240CTL (5 pages)
- PDS1045 (5 pages)
- PDS1040L (5 pages)
- PDS1040CTL (5 pages)
- PDS1040 (5 pages)
- PD3S230L (5 pages)
- PD3S230H (3 pages)
- PDS5100Q (5 pages)
- PDS835L (5 pages)
- PDS760 (5 pages)
- PDS560 (5 pages)
- PDS540 (5 pages)
- PDS5100H (5 pages)
- PDS5100 (5 pages)
- PDS4200H (6 pages)
- SBL3060CTP (4 pages)
- SBL30L30CT (3 pages)
- SBL3045CTP (4 pages)
- SBL3040CTP (4 pages)
- SBL2060CTP (4 pages)
- SBL2030CT - SBL2060CT (3 pages)
- SBL2045CTP (4 pages)
- SBL1060CTP (4 pages)
- SBL1040CTP (4 pages)
- SBG3030CT - SBG3045CT (5 pages)
- SB520 - SB560 (3 pages)
- SB370 - SB3100 (3 pages)
- SB320 - SB360 (3 pages)
- SBR10U100CT (5 pages)
- SBR10U150CT (5 pages)
- SBR10A45SP5 (5 pages)
- SBR1060CT (5 pages)
- SBR1045SP5 (5 pages)
- SBR1045SD1 (4 pages)
- SBR1045D1 (5 pages)
- SBR1045CTL (4 pages)
- SBR1040CT (5 pages)