LIN D
O C
#:
8383
LX8383-xx/8383A-xx/8383B-xx
7 . 5 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 LX8383/8383A/8383B series ICs are
positive regulators designed to provide
7.5A output current. All internal circuitry
is designed to operate down to a 1V in-
put-to-output differential, so the LX8383/
83A/83B can operate with greater effi-
ciency than previously available devices.
The dropout voltage for each product is
fully specified as a function of load cur-
rent.
Dropout is guaranteed at a maxi-
mum of 1.3V
for the LX8383A/83B and
1.5V
for the LX8383, at maximum output
current, decreasing at lower load currents.
Fixed versions are also available and speci-
fied in the Available Options table below.
The LX8383B offers a tighter voltage ref-
erence tolerance: 0.8% initial accuracy and
1% over line, load and temperature. The
LX8383/83A have 1% initial accuracy and
2% over line, load and temperature.
The LX8383/83A/83B series devices are
pin-compatible with earlier 3-terminal
regulators, such as the 117 series prod-
ucts. While a 10碌F output capacitor is
required on both input and output of these
new devices, this capacitor is generally
included in most regulator designs.
The LX8383/83A/83B series quiescent
current flows into the load, thereby
increasing efficiency. This feature
contrasts with PNP regulators, where up
to 10% of the output current is wasted as
quiescent current. The LX8383I/8383AI is
specified over the industrial temperature
range of -25擄C to +125擄C and the
LX8383C/8383AC/8383BC is specified
over the commercial range of 0擄C to
+125擄C.
K E Y F E AT U R E S
s
THREE-TERMINAL ADJUSTABLE OR FIXED
OUTPUT VOLTAGE
s
GUARANTEED < 1.3V HEADROOM AT
7.5A (LX8383A/8383B)
s
GUARANTEED < 1.5V HEADROOM AT
7.5A (LX8383)
s
OUTPUT CURRENT OF 7.5A MINIMUM
p
0.015% LINE REGULATION
p
0.15% LOAD REGULATION
s
EVALUATION BOARD AVAILABLE:
REQUEST
LXE9001 EVALUATION KIT
A P P L I C AT I O N S
s
PENTIUM
廬
PROCESSOR APPLICATIONS
s
HIGH EFFICIENCY LINEAR REGULATORS
s
POST REGULATORS FOR SWITCHING
POWER SUPPLIES
s
BATTERY CHARGERS
s
CONSTANT CURRENT REGULATORS
s
CYRIX
廬
6x86
TM
s
AMD-K5
TM
PRODUCT HIGHLIGHT
3.3V, 7.5A R
E G U L AT O R
IN
OUT
121鈩?/div>
1%
A
VA I L A B L E
O
P T I O N S
Part #
PER
P
AR T
#
Output
Voltage
Adjustable
3.3V
V
IN
鈮?/div>
4.75V
1500碌F
6.3V
6MV1500GX
from Sanyo
LX8383A
ADJ
3.38V at 7.5A
2x 330碌F, 6.3V
Oscon SA type
from Sanyo
-or-
3x 1500碌F, 6.3V
6MV1500GX
from Sanyo
LX8383/83A/83B-00
LX8383/83A/83B-33
Other voltage options may be available 鈥?/div>
Please contact factory for details.
205
鈩?/div>
1%
Application of the LX8383A for the standard voltage (non VRE) Pentium Processor motherboard
with less than 130mV dynamic response to a 7.5A load transient.
PA C K A G E O R D E R I N F O R M AT I O N
T
A
(擄C)
Dropout
Voltage
1.5V
0 to 125
1.3V
1.3V
1.5V
1.3V
P
Plastic TO-220
3-pin
LX8383-xxCP
LX8383A-xxCP
LX8383B-xxCP
LX8383-xxIP
LX8383A-xxIP
V
Plastic TO-247
3-terminal
LX8383-xxCV
LX8383A-xxCV
LX8383B-xxCV
LX8383-xxIV
LX8383A-xxIV
-25 to 125
"xx" refers to output voltage, please see table above.
F O R F U R T H E R I N F O R M AT I O N C A L L ( 7 1 4 ) 8 9 8 - 8 1 2 1
Copyright 漏 1996
Rev. 1.0 12/96
11861 W
ESTERN
A
VENUE
, G
ARDEN
G
ROVE
, CA. 92841
1
1
2
3
4
5
6
7
