LX8584-00CP View Datasheet(PDF) - Microsemi Corporation
Part Name
Description
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LX8584-00CP Datasheet PDF : 9 Pages
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LX8584x-xx
TM
®
7A Low Dropout Positive Regualtors
PRODUCTION DATA SHEET
DESCRIPTION
The LX8584/84A/84B series ICs Current limit is trimmed above 7.1A
are low dropout three-terminal to ensure adequate output current and
positive regulators with a nominal 7A controlled short-circuit current. On-chip
output current. This product family is thermal limiting provides protection
ideally suited for Pentium® Processor against any combination of overload
and Power PCTM applications that would create excessive junction
requiring fast transient response. The temperatures. The LX8584/84A series
LX8584A is guaranteed to have < products are available in both the
1.2V at 7A and the LX8584/84B < through-hole versions of the industry
1.4V at 7A dropout voltage, making standard 3-pin TO-220 and TO-247
them ideal to provide well regulated power packages. The LX1431
outputs of 2.5V to 3.6V using a 5V Programmable Reference utilzed in
input supply. In addition, the conjunction with the LX8584 7A LDO
LX8584B also offers ±1% maximum products offer precision output voltage
voltage reference accuracy over (see application below) and are ideal for
temperature. Fixed versions are also use in VRE applications.
available and are specified in the
Available Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
THE APPLICATION OF THE LX8584A & LX1431 IN A
75 & 166 MHZ P54C PROCESSORS USING 3.3V CACHE
3
2
5V
VIN
VOUT
LX8584A
1kΩ
VO 7A
PLACE IN µP SOCKET CAVITY
(See Table Below)
3x
330µF, 6.3V
Low ESR
ADJ
1
250pF
0.01 µF
1kΩ
Oscon Type
from Sanyo
100µF x 6
10V
220µF
10V
2
3 V+
1
COL
REF 8
1k
0.1%
AVX TYPE
TPS
µP
Load
Low ESR
from
Sanyo
LX1431
2.84kΩ
21k
0.1%
1%
0.1µF
50V
SGND FGND
JP1
1µF x 10
SMD
5
6
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
Pentium™ Processor Supplies
Power PC™ Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator for Switching
Supply
D ROPOUT V OLTAGE VS .
O UTPUT C URRENT
1.5
LX8584/84A
TJ = 125 °C
LX8584
1.0
LX8584A
VOUT
JP1
TYPICAL APPLICATION
3.50 Short
120/166MHz, VRE, 3.3V Cache
3.38 Open 75/90/100/133MHz, STND, 3.3V Cache
Thick traces represent high current traces which must be low resistance /
low inductance in order to achieve good transient response.
0.5
0
1.75
3.5
5.25
7
Output Current - (A)
PACKAGE ORDER INFO
AVAILABLE OPTIONS
TJ (°C) Dropout Voltage P
0 to 125
1.4V
1.2V
Plastic TO-220
3 pin
RoHS Compliant
Transition DC: 0543
LX8584-xxCP
LX8584B-xxCP
LX8584A-xxCP
Part #
Output
Voltage
LX8584/A/B-00 Adjustable
LX8584/A/B/-33
3.3V
Other voltage options may be available –
please contact factory for details.
Note: xx refers to output voltage, please see table to right. Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8584-xxCP-TR)
Copyright © 1997
Rev. 1.3, 2005-11-11
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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