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Microsemi Corporation - 3A LOW DROPOUT POSITIVE REGULATORS

Numéro de référence LX8587A-33
Description 3A LOW DROPOUT POSITIVE REGULATORS
Fabricant Microsemi Corporation 
Logo Microsemi Corporation 





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LX8587A-33 fiche technique
T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 8587
LX8587-xx/8587A-xx
3A LOW DROPOUT POSITIVE REGULATORS
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
The LX8587/8587A series ICs are low
dropout three-terminal positive regulators
with a nominal 3A output current. Pen-
tium® Processor and Power PCTM appli-
cations requiring fast transient response
are ideally suited for this product family.
The LX8587A is guaranteed to have
< 1.2V dropout at 3A and the LX8587
< 1.3V at the same current, making
them ideal to provide well-regulated out-
puts of 2.5V to 3.6V using a 5V input
supply. Fixed versions are also available
and specified in the Available Options
table below.
Current limit is trimmed above 3.1A to
ensure adequate output current and con-
trolled short-circuit current. On-chip
thermal limiting provides protection
against any combination of overload con-
ditions that would create excessive junc-
tion temperatures.
The LX8587/87A family of products are
available in both TO-220 through-hole
as well as TO-263 surface-mount pack-
ages. For higher current applications,
see the LX8585 and LX8584 data sheets.
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
TYPICAL APPLICATION OF THE LX8587/87A IN A 5V TO 3.3V MOTHERBOARD APPLICATION
VIN ³ 4.75
1500µF
6MV1500GX
LX8587A
200W
3.3V/3A
121W 2x 1500µF
Sanyo
6MV1500GX
The output capacitors must be low ESR and low ESL type for good transient response.
KEY FEATURES
s Three-Terminal Adjustable Or Fixed
Output
s Guaranteed 1.2V Headroom At 3A
(LX8587A)
s Guaranteed 1.3V Headroom At 3A
(LX8587)
s Output Current Of 3A
p Fast Transient Response
p 1% Voltage Reference Initial Accuracy
p Output Short Circuit Protection
p Built-In Thermal Shutdown
APPLICATIONS
s Pentium Processor Supplies
s Power PC Supplies
s Microprocessor Supplies
s Low Voltage Logic Supplies
s Post Regulator For Switching Supply
s ASIC & Low Voltage Chipset Supplies
s Graphics & Sound Cards
s Processor I/O Supply
AVAILABLE O PTIONS PER PAR T #
Part #
Output
Voltage
LX8587/87A-00
Adjustable
LX8587/87A-15
1.5V
LX8587/87A-33
3.3V
Other voltage options may be available —
Please contact factory for details.
Copyright © 1998
Rev. 1.2 3/98
PACKAGE ORDER INFORMATION
TA (°C)
Dropout
Voltage
P
Plastic TO-220
3-pin
DD
Plastic
3-pin
TO-263
0 to 125
1.3V
1.2V
LX8587-xxCP
LX8587A-xxCP
LX8587-xxCDD
LX8587A-xxCDD
Note: All surface-mount packages are available in Tape & Reel.
Append the letter "T" to part number. (i.e. LX8587A-00CDDT)
"xx" refers to output voltage, please see table above.
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1

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