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PDF AMC7588 Data sheet ( Hoja de datos )
| Número de pieza | AMC7588 | |
| Descripción | ADJUSTABLE 3A LOW DROPOUT REGULATOR | |
| Fabricantes | ADD Microtech | |
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AMC DOC. #: AMC7588_E (LF)
Feb. 2005
A®
DD MICROTECH CORP.
DESCRIPTION
The AMC7588 is a high performance low dropout
regulator rated for 3A output current. It is designed for
use in applications requiring low dropout characteristics
as well as fast transient response over the rated current
range.
These features are ideal for low voltage micro- processor
applications requiring a regulated 2.5V to 3.6V power
supply. On chip trimming adjusts the reference voltage to
1%.
In addition, the AMC7588 provides the device protections
including over current and thermal shutdown. Also,
reverse battery protection scheme limits the reverse
current when the input voltage falls below the output
AMC7588
ADJUSTABLE 3A LOW DROPOUT
REGULATOR
FEATURES
Input-Output differential of typical 1.1V
at 3A and low quiescent current
Output current is excess of 3A
Reverse battery protection
Fast transient response
Short circuit protection
Internal thermal overload protection
Available in 3L plastic TO-220, surface
mount 3L TO-263 and 3L TO-252 packages
Pin assignment identical to EZ158XB and
LT158XA series.
APPLICATIONS
Pentium® Processor Supplies
PowerPCTM Supplies
Computer Add-On Cards
Other Applications Requiring
Low Dropout Voltage Over
Rated Current.
Voltage Options:
AMC7588-ADJ -- Adjustable
PACKAGE PIN OUT
3-Pin Plastic TO-220
(Top View)
VIN
VOUT
ADJ
VIN
VOUT
ADJ
3-Pin Plastic TO-263
Surface Mount
(Top View)
VIN
VOUT
ADJ
3-Pin Plastic TO-252
Surface Mount
(Top View)
ORDER INFORMATION
TA (OC)
T Plastic TO-220
3-pin
ST Plastic TO-263
3-pin
SJ Plastic TO-252
3-pin
0 to 70 AMC7588-ADJT
AMC7588-ADJST
AMC7588-ADJSJ
0 to 70 AMC7588-ADJTF(Lead Free) AMC7588-ADJSTF(Lead Free) AMC7588-ADJSJF(Lead Free)
Note: 1.All surface-mount packages are available in Tape & Reel. Append the letter “T” to part number (i.e.,
AMC7588-ADJTT, AMC7588-ADJSTT or AMC7588-ADJSJT).
2. The letter ”F” is marked for Lead Free process.
Copyright © 2002, ADD Microtech Corp.
1
www.addmtek.com
1 page  
AMC DOC. #: AMC7588_E (LF)
Feb. 2005
AMC7588
ADJUSTABLE 3A LOW DROPOUT REGULATOR
Application Note:
Maximum Power Calculation:
PD(MAX)=
TJ(MAX) – TA(MAX)
θJA
TJ(OC): Maximum recommended junction temperature
TA(OC): Ambient temperature of the application
θJA(OC/W): Junction-to-junction temperature thermal resistance of the package, and other heat dissipating
materials.
The maximum power dissipation of a single-output regulator :
PD(MAX) = [(VIN(MAX) - VOUT(NOM))] × IOUT(NOM) + VIN(MAX) × IQ
Where: VOUT(NOM) = the nominal output voltage
IOUT(NOM) = the nominal output current, and
IQ = the quiescent current the regulator consumes at IOUT(MAX)
VIN(MAX) = the maximum input voltage
Then θJA = (150 OC– TA) / PD
Thermal consideration:
When power consumption is over about 1.2W the devices using TO-220/263 packages ( 687 mW for TO-252 packages ),
additional heat sink is required to control the junction temperature below 125 OC.
The junction temperature is: TJ = P D (θJT + θCS + θSA ) + T A
P D : Dissipated power.
θJT : Thermal resistance from the junction to the mounting tab of the package.
θCS :Thermal resistance through the interface between the IC and the surface on which it is mounted.
(typically,θCS < 1.0°C / W)
θSA : Thermal resistance from the mounting surface to ambient (thermal resistance of the heat sink).
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 θSA (OC / W ) 59
PCB heat sink size (mm2) 500
45
1000
38
1500
33
2000
27
3000
24
4000
21
5000
Recommended figure of PCB area used as a heat sink.
through hole vias
(Top View)
(Bottom View)
Copyright © 2002, ADD Microtech Corp.
5
www.addmtek.com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet AMC7588.PDF ] | |
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