AMC7580-ADJDD ETC1 [List of Unclassifed Manufacturers], AMC7580-ADJDD Datasheet - Page 10

• Manufacturer Part Number: AMC7580-ADJDD
• Description: 7A LOW DROPOUT REGULATOR
• Manufacturer: ETC1 [List of Unclassifed Manufacturers]

AMC DOC. #: AMC7580_E (LF)
Feb 2005
Maximum Power Calculation:
Thermal consideration:
When power consumption is over about 1.2W( at 70
junction temperature below 125
The junction temperature is: Tj = P
If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of
copper foil required. For multi-layered PCB, these layers can also be used as a heat sink. They can be connected with
several through hole vias.
PCB heat sink size (mm
Recommended figure of PCB area used as a heat sink.
Copyright © 2002, ADD Microtech Corp.
The maximum power dissipation of a single-output regulator :
P
PCB θ
θ
D(MAX)
JA
θ
θ
P
θ
P
(
JT
CS:
T
SA:
D(MAX)
T
O
D
: T hermal resistance from the junction to the mounting tab of the package.
C/W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating
A
: D issipated power.
J
 T hermal resistance from the mounting surface to ambient (thermal resistance of the heat sink).
(
(
 T hermal resistance through the interface between the IC and the surface on which it is mounted. (typically,
θ
SA
O
O
Where: V
= [(V
C): Maximum recommended junction temperature
C): Ambient temperature of the application
CS
(°C / W )
=
Then θ
< 1.0 °C / W)
materials.
T
IN(MAX)
(Top View)
J(MAX)
I
I
V
OUT(NOM)
Q
JA
OUT(NOM)
IN(MAX)
= the quiescent current the regulator consumes at I
= (150
θ
- V
– T
2
JA
) 500
59
OUT(NOM)
A(MAX)
= the maximum input voltage
O
= the nominal output current, and
O
= the nominal output voltage
C.
C – T
)] × I
D
A
) / P
(θ
45
1000
JT
OUT(NOM)
D
+ θ
CS
o
+ θ
C ambient temperature), additional heat sink is required to control the
+ V
(Bottom View)
SA
38
1500
IN(MAX)
) + T
10
A
× I
Q
33
2000
through hole vias
OUT(MAX)
7A L
27
3000
OW
D
ROPOUT
24
4000
AMC7580
R
www.addmtek.com
EGULATOR
21
5000