LX8584B-33CV

Manufacturer Part NumberLX8584B-33CV
DescriptionIC REG LDO POS 7A 3.3V TO247
ManufacturerMicrosemi Analog Mixed Signal Group
LX8584B-33CV datasheet
 


Specifications of LX8584B-33CV

Regulator TopologyPositive FixedVoltage - Output3.3V
Voltage - InputUp to 10VNumber Of Regulators1
Current - Output7A (Min)Operating Temperature0°C ~ 125°C
Mounting TypeThrough HolePackage / CaseTO-247
Lead Free Status / RoHS StatusLead free / RoHS CompliantVoltage - Dropout (typical)-
Current - Limit (min)-  
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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

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LX8584B-33CV Summary of contents

  • Page 1

    ... 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: ...

  • Page 2

    Power Dissipation ....................................................................................Internally Limited Input Voltage .................................................................................................................10V Input to Output Voltage Differential..............................................................................10V Maximum Output Current................................................................................................8A Maximum Operating ...

  • Page 3

    ... Line Regulation (Note 2) Load Regulation (Note 2) Thermal Regulation Ripple Rejection (Note 3) Quiescent Current LX8584-xx Dropout Voltage LX8584A-xx LX8584B-xx Maximum Output Current Temperature Stability (Note 3) Long Term Stability (Note 3) RMS Output Noise (% OUT (Note 3) Note 2: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to heating effects are covered under the specification for thermal regulation ...

  • Page 4

    TM The LX8584/84A/84B series ICs are easy to use Low-Dropout (LDO) voltage regulators. They have all of the standard self- protection features expected of a voltage regulator: short circuit protection, safe operating area protection and automatic thermal shutdown if the ...

  • Page 5

    TM Overload Recovery (continued) If this limited current is not sufficient to develop the designed voltage across the output resistor, the voltage will stabilize at some lower value, and will never reach the designed value. Under these circumstances, it may ...

  • Page 6

    TM LOAD REGULATION (continued) Even when the circuit is optimally configured, parasitic resistance can be a significant source of error. A 100 mil (2.54 mm) wide PC trace built from 1 oz. copper-clad circuit board material has a parasitic resistance ...

  • Page 7

    TM LX8584/84A/84B (Note A) V OUT IN IN ADJ 10µ improves ripple rejection. 365 Ω should be ≈ ripple frequency. Figure 4 – Improving Ripple Rejection V IN (Note A) TTL Output ...

  • Page 8

    TM P 3-Pin Plastic TO-220 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 ...

  • Page 9

    TM PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not ...

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