LIN DOC #: 8383
LX8383-xx/8383A-xx/8383B-xx
7. 5A 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 V A T I O N
P R O D U C T I O N D A T A S H E E T
DESCRIPTION
KEY FEATURES
■ THREE-TERMINAL ADJUSTABLE OR FIXED
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
OUTPUT VOLTAGE
■ GUARANTEED < 1.3V HEADROOM AT
7.5A (LX8383A/8383B)
■ GUARANTEED < 1.5V HEADROOM AT
7.5A (LX8383)
■ OUTPUT CURRENT OF 7.5A MINIMUM
p 0.015% LINE REGULATION
p 0.15% LOAD REGULATION
■ EVALUATION BOARD AVAILABLE:
REQUEST LXE9001 EVALUATION KIT
pin-compatible with earlier 3-terminal
regulators, such as the 117 series prod-
ucts. While a 10µF 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°C to +125°C and the
LX8383C/8383AC/8383BC is specified
over the commercial range of 0°C to
+125°C.
APPLICATIONS
■ PENTIUM® PROCESSOR APPLICATIONS
■ HIGH EFFICIENCY LINEAR REGULATORS
■ POST REGULATORS FOR SWITCHING
POWER SUPPLIES
■ BATTERY CHARGERS
■ CONSTANT CURRENT REGULATORS
■ CYRIX® 6x86TM
■ AMD-K5TM
PRODUCT HIGHLIGHT
AVAILABLE OPTIONS PER PAR T #
3.3V, 7.5A REGULATOR
Output
Part #
Voltage
IN
OUT
LX8383/83A/83B-00
LX8383/83A/83B-33
Other voltage options may be available —
Please contact factory for details.
Adjustable
3.3V
3.38V at 7.5A
V
IN ≥ 4.75V
LX8383A
121Ω
1%
1500µF
2x 330µF, 6.3V
Oscon SA type
from Sanyo
-or-
ADJ
6.3V
6MV1500GX
from Sanyo
3x 1500µF, 6.3V
6MV1500GX
from Sanyo
205
1%
Ω
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.
PACKAGE ORDER INFORMATION
Plastic TO-220
3-pin
Plastic TO-247
Dropout
Voltage
TA (°C)
0 to 125
-25 to 125
P
V
3-terminal
1.5V
1.3V
1.3V
1.5V
1.3V
LX8383-xxCP
LX8383A-xxCP
LX8383B-xxCP
LX8383-xxIP
LX8383-xxCV
LX8383A-xxCV
LX8383B-xxCV
LX8383-xxIV
LX8383A-xxIP
"xx" refers to output voltage, please see table above.
LX8383A-xxIV
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 © 1996
Rev. 1.0 12/96
1
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841