LX8584x-xx
TM
廬
7A Low Dropout Positive Regualtors
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
Three Terminal Adjustable or
Fixed Output
Guaranteed 1% Voltage
Accuracy over Temperature
(LX8584B)
Guaranteed < 1.2V Headroom
at 7A (LX8584A)
Guaranteed < 1.4V Headroom
at 7A (LX8584/84B)
Output Current of 7A
Fast Transient Response
1% Voltage Reference Initial
Accuracy
Output Short Circuit Protection
Built-in Thermal Shutdown
Evaluation Board Available:
Request LXE9001 Evaluation
Kit
APPLICATIONS
The LX8584/84A/84B series ICs
are low dropout three-terminal
positive regulators with a nominal 7A
output current. This product family is
ideally suited for Pentium廬 Processor
and Power PCTM applications
requiring fast transient response. The
LX8584A is
guaranteed to have <
1.2V at 7A
and the LX8584/84B
<
1.4V at 7A dropout voltage,
making
them ideal to provide well regulated
outputs of 2.5V to 3.6V using a 5V
input supply. In addition,
the
LX8584B also offers 鹵1% maximum
voltage reference accuracy over
temperature.
Fixed versions are also
available and are specified in the
Available Options table below.
Current limit is trimmed above 7.1A
to ensure adequate output current and
controlled short-circuit current. On-chip
thermal limiting provides protection
against any combination of overload
that would create excessive junction
temperatures. The LX8584/84A series
products are available in both the
through-hole versions of the industry
standard 3-pin TO-220 and TO-247
power packages.
The LX1431
Programmable Reference utilzed in
conjunction with the LX8584 7A LDO
products offer precision output voltage
(see application below) and are ideal for
use in VRE applications.
WWW .
Microsemi
.C
OM
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
T
HE
A
PPLICATION OF THE
LX8584A & LX1431
IN A
75 & 166 MH
Z
P54C P
ROCESSORS
U
SING
3.3V C
ACHE
5V
3
V
IN
V
OUT
2
V
O
7A
(See Table Below)
PLACE IN 碌P SOCKET CAVITY
Pentium鈩?Processor Supplies
Power PC鈩?Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator for Switching
Supply
D
ROPOUT
V
OLT AGE VS
.
O
UTPUT
C
URRENT
LX8584A
1k惟
ADJ
1
250pF
2
220碌F
10V
Low ESR
from
Sanyo
0.1碌F
50V
3
V
+
1
COL
REF
8
2.84k惟
0.1%
1k惟
0.01碌F
3x
330碌F, 6.3V
Low ESR
Oscon Type
from Sanyo
100碌F x 6
10V
AVX TYPE
TPS
1.5
LX8584/84A
T
J
= 125 擄C
LX1431
SGND FGND
5
6
21k
1%
JP1
Input Output Differential V
1k
0.1%
碌P
Load
1碌F x 10
SMD
LX8584
1.0
LX8584A
V
OUT
3.50
3.38
JP1
Short
Open
TYPICAL APPLICATION
120/166MHz, VRE, 3.3V Cache
75/90/100/133MHz, STND, 3.3V Cache
0.5
0
1.75
3.5
5.25
7
Thick traces represent high current traces which must be low resistance /
low inductance in order to achieve good transient response.
Output Current - (A)
LX8584
X
LX8584
X
PACKAGE ORDER INFO
AVAILABLE OPTIONS
T
J
(擄C) Dropout Voltage
1.4V
1.2V
Copyright
漏
1997
Rev. 1.3, 2005-11-11
P
Plastic TO-220
3 pin
RoHS Compliant
Transition DC: 0543
Part #
LX8584/A/B-00
LX8584/A/B/-33
Output
Voltage
Adjustable
3.3V
0 to 125
LX8584-xxCP
LX8584B-xxCP
LX8584A-xxCP
Other voltage options may be available 鈥?/div>
please contact factory for details.
Note: xx refers to output voltage, please see table to right. Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX8584-xxCP-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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