AMC7585-3.3 ADDTEK [ADDtek Corp], AMC7585-3.3 Datasheet - Page 7

• Manufacturer Part Number: AMC7585-3.3
• Description: 5A LOW DROPOUT REGULATOR
• Manufacturer: ADDTEK [ADDtek Corp]

Copyright © 2007 ADDtek Corp.
The maximum power dissipation of a single-output regulator:
Thermal consideration:
overload conditions. However maximum junction temperature ratings should not be exceeded under continuous normal
load conditions. The thermal protection circuit of AMC7585 series will prevent the device from damage due to
excessive power dissipation. When the device temperature rises to approximately 150 °C, the regulator will be turned
off.
T
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.
A
PCB heat sink size (mm
P
=70 °C), additional heat sink is required to control the junction temperature below 125 °C.
D(MAX)
The AMC7585 series have internal power and thermal limiting circuitry designed to protect the device under
When power consumption is over about 1.2W (for TO-220/ TO-263 package, 687mW for TO-252 package, at
The junction temperature is: T
If PC Board copper is going to be used as a heat sink, below table can be used to determine the appropriate size of
Recommended figure of PCB area used as a heat sink.
PCB θ
θ
P
θ
θ
TS
JT
SA
D
= [(V
SA
: Thermal resistance from the junction to the mounting tab of the package.
: Thermal resistance through the interface between the IC and the surface on which it is mounted.
: Dissipated power.
: Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink).
(For TO-220, TO-263, and TO-263-3 packages, θ
(°C / W )
(typically, θ
IN(MAX)
V
I
I
V
OUT(NOM)
Q
OUT(NOM)
IN(MAX)
= the quiescent current the regulator consumes at I
2
)
- V
CS
(Top View)
< 1.0 °C / W)
OUT(NOM)
= the maximum input voltage
500
= the nominal output current, and
59
= the nominal output voltage
J
= P
D
)] × I
APPLICATION INFORMATION
(θ
1000
JT
45
+ θ
OUT(NOM)
TS
+ θ
SA
1500
38
) + T
+ V
7
IN(MAX)
A
(Bottom View)
JT
=6 °C /W. For TO-252 package, θ
2000
33
× I
Q
OUT(MAX)
through hole vias
3000
27
DD041_G -- OCTOBER 2007
4000
24
JT
AMC7585
=7°C /W)
5000
21