LX8584-33CP

Manufacturer Part NumberLX8584-33CP
DescriptionIC REG LDO POS 7A 3.3V TO220
ManufacturerMicrosemi Analog Mixed Signal Group
LX8584-33CP datasheet
 


Specifications of LX8584-33CP

Regulator TopologyPositive FixedVoltage - Output3.3V
Voltage - InputUp to 10VNumber Of Regulators1
Current - Output7A (Min)Operating Temperature0°C ~ 125°C
Mounting TypeThrough HolePackage / CaseTO-220
Lead Free Status / RoHS StatusLead free / RoHS CompliantVoltage - Dropout (typical)-
Current - Limit (min)-  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
Page 1/9

Download datasheet (267Kb)Embed
Next
TM
D E S C R I P T I O N
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® 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,
LX8584B also offers ±1% maximum
voltage reference accuracy over
temperature. Fixed versions are also
available and are specified in the
Available Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
P R O D U C T H I G H L I G H T
T
A
HE
PPLICA TION OF THE
75 & 166 MH
P54C P
Z
3
2
V
V
5V
IN
OUT
LX8584A
1kΩ
ADJ
0.01µF
1kΩ
1
250pF
2
1
COL
3
8
220µF
V
V
V
+
+
+
REF
10V
Low ESR
LX1431
from
Sanyo
0.1µF
50V
SGND FGND
5
6
V
JP1
OUT
3.50
Short
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.
P A C K A G E O R D E R I N F O
P
T
(°C) Dropout Voltage
J
1.4V
0 to 125
1.2V
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
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
®
7A Low Dropout Positive Regualtors
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
the
products offer precision output voltage
(see application below) and are ideal for
use in VRE applications.
http://www.microsemi.com
LX8584A & LX1431
IN A
U
3.3V C
ROCESSORS
SING
ACHE
V
7A
PLACE IN µP SOCKET CAVITY
O
(See Table Below)
3x
330µF, 6.3V
Low ESR
Oscon Type
from Sanyo
100µF x 6
10V
AVX TYPE
1k
TPS
µP
0.1%
Load
2.84kΩ
21k
0.1%
1%
1µF x 10
SMD
JP1
TYPICAL APPLICATION
120/166MHz, VRE, 3.3V Cache
Plastic TO-220
3 pin
RoHS Compliant
Transition DC: 0543
LX8584-xxCP
LX8584B-xxCP
LX8584A-xxCP
Microsemi
Integrated Products Division
LX8584x-xx
P
D
S
RODUCTION
ATA
HEET
K E Y F E A T U R E S
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
A P P L I C A T I O N S
Pentium™ Processor Supplies
Power PC™ Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator for Switching
Supply
D
V
.
ROPOUT
OLT AGE VS
O
C
UTPUT
URRENT
1.5
LX8584/84A
T
J
LX8584
1.0
LX8584A
0.5
0
1.75
3.5
5.25
Output Current - (A)
A V A I L A B L E O P T I O N S
Output
Part #
Voltage
LX8584/A/B-00
Adjustable
LX8584/A/B/-33
3.3V
Other voltage options may be available –
please contact factory for details.
= 125 °C
7
Page 1

LX8584-33CP Summary of contents

  • Page 1

    ... J 1. 125 1.2V 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 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® ...

  • Page 2

    ... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 7A Low Dropout Positive Regualtors . , θ T 2.7°C θ A 60°C/W MBIENT JA x θ Microsemi Integrated Products Division LX8584x- RODUCTION ATA HEET TAB is GND ADJ/GND ACKAGE (Top View) RoHS 100% Matte Tin Lead Finish IN OUT ...

  • Page 3

    ... Dropout Voltage LX8584/84B LX8584/84B Minimum Load Current Maximum Output Current Temperature Stability Long Term Stability RMS Output Noise (% OUT LX8584-33 / 84A-33 / 84B-33 (3.3V Fixed LX8584B-33 Output Voltage LX8584/84A-33 Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Quiescent Current ...

  • Page 4

    ... Use of an output capacitor is REQUIRED with the LX8584 / 84A / 84B series. Please see the table below for recommended minimum capacitor values. These regulators offer a more tightly controlled reference voltage tolerance and superior reference stability when measured against the older pin-compatible regulator types that they replace ...

  • Page 5

    ... Output ripple will be twice as bad as it would be if the ADJ pin were to be bypassed to ground with a properly selected capacitor. OUTPUT VOLTAGE The LX8584/84A/84B ICs develop a 1.25V reference voltage between the output and the adjust terminal (See Figure 2). By placing a resistor, R1, between these two terminals, a constant current is caused to flow through R1 and down through R2 to set the overall output voltage ...

  • Page 6

    ... DROPOUT(MAX) installed regulator. THERMAL CONSIDERATIONS The LX8584/84A/84B regulators have internal power and thermal limiting circuitry designed to protect each device under overload conditions. For continuous normal load conditions, however, maximum junction temperature ratings must not be exceeded important to give careful consideration to all sources of thermal resistance from junction to ambient ...

  • Page 7

    ... Figure 6 – 5V Regulator with Shutdown LX8584/84A/84B-33 OUT IN GND Figure 7 – Fixed 3.3V Output Regulator ) + (V ) DROPOUT(MAX) Microsemi Integrated Products Division LX8584x- RODUCTION ATA HEET LX8584/84A/84B OUT IN V OUT ADJ R1 121Ω C2 C1* 100µF 10µ 1.25V 121Ω 1% 100µF 365Ω ...

  • Page 8

    ... S 1. 5.84 U 0.508 Note: 1. Dimensions do not include mold flash or protrusions; J these shall not exceed 0.155mm(.006”) on any side. Lead dimension shall not include solder coverage. Microsemi Integrated Products Division LX8584x- ATA HEET I ILLIMETERS NCHES MAX MIN MAX 15.88 0.560 0.625 10 ...

  • Page 9

    ... Pentium is a trademark of Intel Corporation\ PowerPC is a trademark of Motorola Inc. Copyright © 1997 Rev. 1.3, 2005-11-11 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® 7A Low Dropout Positive Regualtors P RODUCTION Microsemi Integrated Products Division LX8584x- ATA HEET Page 9 ...