LIN DOC #: 8384
LX8384-xx/8384A-xx/8384B-xx
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 A T 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 LX8384/84A/84B Series ICs are posi-
tive regulators designed to provide 5A
output current. These regulators yield
higher efficiency than currently available
devices with all internal circuitry designed
to operate down to a 1V input-to-output
differential. In each of these products,
the dropout voltage is fully specified as
a function of load current. Dropout is
guaranteed at a maximum of 1.3V
(8384A) and 1.5V (8384) at maximum
output current, decreasing at lower load
currents.
In addition, on-chip trimming adjusts
the reference voltage tolerance to 1%
maximum at room temperature and 2%
maximum over the 0 to 125°C range
for the LX8384A, making this ideal for
the Pentium P54C-VRE specification.
The LX8384B offers 0.8% tolerance at
room temperature and 1.0% maximum
over line, load and temperature.
Fixed versions are also available and
specified in the Available Options table
below.
The LX8384/84A/84B Series devices
are pin-compatible with earlier 3-
terminalregulators, such as the 117 series
products. 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 LX8384/84A/84B Series quiescent
current flows into the load, thereby
increasing efficiency. This feature
constrasts with PNP regulators where up
to 10% of the output current is wasted as
quiescent current. The LX8384-xxI is
specified over the industrial temperature
range of -25°C to 125°C, while the
LX8384-xxC/84A-xxC/84B-xxC is
specified over the commercial range of
0°C to 125°C.
OUTPUT
■ GUARANTEED < 1.3V HEADROOM AT 5A
(LX8384A-xx)
■ GUARANTEED 2.0% MAX. REFERENCE
TOLERANCE (LX8384A-xx)
■ GUARANTEED 1.0% MAX. REFERENCE
TOLERANCE (LX8384B-xx)
■ OUTPUT CURRENT OF 5A MINIMUM
p 0.015% LINE REGULATION
p 0.15% LOAD REGULATION
APPLICATIONS
■ PENTIUM® PROCESSOR VRE APPLICATIONS
■ HIGH EFFICIENCY LINEAR REGULATORS
■ POST REGULATORS FOR SWITCHING POWER
SUPPLIES
■ BATTERY CHARGERS
■ CONSTANT CURRENT REGULATORS
■ CYRIX® 6x86TM
■ AMD-K5TM
IMPORTANT: For the most current data, consult LinFinity's web site: http://www.linfinity.com.
AVAILABLE OPTIONS PER PAR T #
PRODUCT HIGHLIGHT
Output
Part #
Voltage
3.5V, 5A REGULATOR
LX8384/84A/84B-00
LX8384/84A/84B-15
LX8384/84A/84B-33
Other voltage options may be available —
Please contact factory for details.
Adjustable
1.5V
IN
OUT
3.3V
3.5V at 5A
5V
LX8384A
121Ω
0.1%
1500µF
*
*
1500µF
6MV1500GX
Sanyo
ADJ
5x 6MV1500GX
Sanyo
Capacitors must
have < 20mΩ Total ESR.
218
Ω
0.1%
*
An application of the LX8384A for the Pentium P54C processors meeting VRE specfication.
PACKAGE ORDER INFORMATION
Plastic TO-220
3-pin
Plastic TO-263
DD
3-pin
Max. Ref. Max. Dropout
TA (°C)
P
Accuracy
Voltage
2.0%
2.0%
1.0%
2.0%
1.5V
1.3V
1.3V
1.5V
LX8384-xxCP
LX8384A-xxCP
LX8384B-xxCP
LX8384-xxIP
LX8384-xxCDD
LX8384A-xxCDD
LX8384B-xxCDD
LX8384-xxIDD
0 to 125
-25 to 125
Note: All surface-mount packages are available in Tape & Reel, append the letter "T" to part number.
(i.e. LX8384A-xxCDDT) "xx" refers to output voltage, please see table above.
L I N F I N I T Y M I C R O E L E C T R O N I C S I N C .
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
Copyright © 1997
Rev. 1.9 12/97
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