LIN D
O C
#:
8587
LX8587-xx/8587A-xx
3 A L
O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
T
H E
I
N F I N I T E
P
O W E R
O F
I
N N O VA T I O N
P
R O D U C T I O N
D
A T A
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
廬
Processor and Power PC
TM
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.
K E Y F E AT U R E S
s
Three-Terminal Adjustable Or Fixed
Output
s
Guaranteed
鈮?/div>
1.2V Headroom At 3A
(LX8587A)
s
Guaranteed
鈮?/div>
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
s
s
s
s
s
s
Power PC Supplies
Microprocessor Supplies
Low Voltage Logic Supplies
Post Regulator For Switching Supply
ASIC & Low Voltage Chipset Supplies
Graphics & Sound Cards
Processor I/O Supply
IMPORTANT:
For the most current data, consult LinFinity's web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
T
YPICAL
A
PPLICATION OF THE
LX8587/87A
IN
A
5V
TO
3.3V M
OTHERBOARD
A
PPLICATION
V
IN
魯
4.75
1500碌F
6MV1500GX
LX8587A
121W
3.3V/3A
2x 1500碌F
Sanyo
6MV1500GX
A
VA I L A B L E
O
P T I O N S
Part #
LX8587/87A-00
LX8587/87A-15
LX8587/87A-33
PER
P
AR T
#
Output
Voltage
Adjustable
1.5V
3.3V
200W
The output capacitors must be low ESR and low ESL type for good transient response.
Other voltage options may be available 鈥?/div>
Please contact factory for details.
PA C K A G E O R D E R I N F O R M AT I O N
Dropout
T
A
(擄C)
P
Plastic TO-220
DD
Plastic TO-263
Voltage
3-pin
3-pin
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.
Copyright 漏 1998
Rev. 1.2 3/98
L
IN
F
INITY
M
ICROELECTRONICS
I
NC
.
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841, 714-898-8121, F
AX
: 714-893-2570
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