LIN D
O C
# :
8385
LX8385-xx/8385A-xx/8385B-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 LX8385/8385A/8385B series ICs are
positive regulators designed to provide
3A output current. Each regulator yields
higher efficiency than currently available
devices with all internal circuitry designed
to operate down to a 1V input-to-output-
differential. In these products, the drop-
out voltage is fully specified as a function
of load current. The LX8385's dropout is
guaranteed at a maximum of 1.5V at maxi-
mum output current, decreasing at lower
load currents. The LX8385A/85B have a
maximum dropout voltage of 1.3V.
The LX8385B offers a tighter voltage
reference tolerance: 卤1.0% over line, load
and temperature, with 0.8% initial accu-
racy. The LX8385/85A have 1.0% initial
accuracy, with 2% over line, load and tem-
perature.
The LX8385/85A/85B series devices are
pin-compatible with earlier 3-terminal
regulators, such as 117 series products.
While a 10碌F output capacitor is required
on both input and output of these new
devices, this is generally included in most
regulator designs.
The quiescent current of the LX8385/
85A/85B series products flows into the
load, increasing efficiency. This feature
contrasts with PNP regulator designs,
where up to 10% of the output current is
wasted as quiescent current.
The LX8385-xxI is rated for -25掳C to
+125掳C applications, and the LX8385-xxC
/8385B-xxC is rated for 0掳C to +125掳C
applications.
K E Y F E AT U R E S
s
Three-Terminal Adjustable Or Fixed
Output Voltage
s
Guaranteed 1% Voltage Reference
Accuracy Over Line, Load And
Temperature (LX8385B)
s
Guaranteed < 1.5V Headroom At 3A
(LX8385)
s
Guaranteed < 1.3V Headroom At 3A
(LX8385A/8385B)
s
Output Current Of 3A Minimum
p
0.015% Line Regulation
p
0.1% Load Regulation
A P P L I C AT I O N S
s
High Efficiency Linear Regulators
s
Post Regulators For Switching
Power Supplies
s
Battery Chargers
s
Constant Current Regulators
s
Graphics & Standard Supplies
s
Processor I/O Supply
s
Low Voltage Memory & Chipset Supplies
NOTE:
For current data & package dimensions, visit our web site:
http://www.linfinity.com.
PRODUCT HIGHLIGHT
3.3V, 3 A 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
PER
P
AR T
#
Output
Voltage
5V
1500碌F, 6.3V
6MV1500GX
LX8385
ADJ
3.3V at 3A
2x 1500碌F, 6.3V
6MV1500GX
from Sanyo
Part #
LX8385/85A/85B-00
LX8385/85A/85B-33
LX8385/85A/85B-05
Adjustable
3.3V
5.0V
200
鈩?/div>
1%
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 *
T
A
(掳C)
Dropout
Voltage
1.5V
0 to 125
-25 to 125
1.3V
1.3V
1.5V
P
Plastic TO-220
3-pin
LX8385-xxCP
LX8385A-xxCP
LX8385B-xxCP
LX8385-xxIP
DD
Plastic TO-263
3-pin
LX8385-xxCD
LX8385A-xxCD
LX8385B-xxCD
LX8385-xxID
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number
(i.e. LX8385-00CDDT). "xx" refers to output voltage, please see table above.
* Consult factory for availability of TO-3 Metal Can.
Copyright 漏 1999
Rev. 2.0a 10/00
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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