LX8580A
L I N F I N I T Y
D I V I S I O N
7.5A Very Low Dropout Positive Regulator
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
W W W.
Microsemi
.COM
The
LX8580A
is
a
high-
performance, very low dropout voltage
regulator, designed for use with
advanced microprocessors, micro
controllers,
or
video
graphics
controllers. This product can be used
with separate voltage supplies for the
control and power sections, allowing a
power regulation dropout voltage as
low as 100mV @ 1.5A. In AGP bus
systems requiring regulation of 3.3V
to 2.85V @ 3A, the LX8580A has a
max dropout of 250mV making it an
ideal power supply solution for today鈥檚
graphics applications.
The LX8580A can also be used in a
single voltage supply configuration
with
a
dropout
performance
similar to that of the LX8584 (1.3V @
7.5A).
The LX8580A is supplied in a five-
terminal
TO-220,
TO-263,
or
Linfinity鈥檚 S-PAK packages, which
allows the implementation of remote
(Kelvin) voltage sensing. This sensing
compensates
for
output
voltage
variations due to load changes and
resistive voltage drops in connectors
and board traces.
Typical load
regulation measured at the sense pin is
less that 1mV for a load current step of
7mA to 7.5A.
The LX8580A is ideal for generating a
secondary 2V-2.85V low voltage supply
on a motherboard where a 3.3V supply
is already available.
!
Low Dropout, 650mV at 7.5A
Output Current in Dual Supply
Mode
!
Fast Transient Response
!
Remote Sensing
!
1mV Load Regulation
!
Adjustable Output
APPLICATIONS/BENEFITS
APPLICATIONS/BENEFITS
!
Microprocessor/Micro controller
Supplies
!
3.3V to 2.85V Voltage
Conversion
!
High-Current Regulators
!
Post Regulation for Switching
Power Supplies
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
V
CTRL
鈮?/div>
V
OUT
+ 1.3V Max
4
V
C T RL
OUTPUT
3
V
OU T
LX8580A
V
PW R
鈮?/div>
V
OUT
+ V
DROPOUT
5
V
PW R
SENSE
1
R
1
R
L
R
2
ADJUST
2
V
OUT
=
V
REF
錚?/div>
1
+
錚?/div>
錚?/div>
錚?/div>
R
2
錚?/div>
錚?/div>
+
I
ADJ
脳
R
2
R
1
錚?/div>
錚?/div>
LX8580A
LX8580A
T
A
(擄C)
擄
0 to 125
D
ROPOUT
V
OLTAGE
0.1V 鈥?0.7V
P
PACKAGE ORDER INFO
Plastic TO-220
S-PAK
DF
5-pin
5-Pin
LX8580ACP
LX8580ACDF
Plastic TO-263
DD
5-PIN
LX8580ACDD
Note: Available in Tape & Reel.
Append the letter 鈥淭鈥?to the part number. (i.e. LX8580ACDDT)
Copyright
錚?/div>
2001
Rev. 1.0a, 2002-02-01
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
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