LX8385x-xx
TM
廬
3A Low Dropout Positive Regulators
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
The LX8385/85A/85B Series ICs are
positive regulators designed to provide 3A
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
(8385A/B) and 1.5V (8385) 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擄C range for the LX8385A. The
LX8385B 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 LX8385/85A/85B Series devices are
pin-compatible with earlier 3-terminal
regulators, such as the 117 series products,
but they do require input and output
capacitors. A minimum 10碌F capacitor is
required on the input and a 15碌F or greater
on the output of these new devices for
stability. Although, these capacitors are
generally included in most regulator designs.
The LX8385/85A/85B 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 LX8385-xxI is specified over the
industrial temperature range of -25擄C to
125擄C, while the LX8385-xxC / 85A-xxC /
85B-xxC is specified over the commercial
range of 0擄C to 125擄C.
KEY FEATURES
WWW .
Microsemi
.C
OM
Three-Terminal Adjustable Or
Fixed Output
Guaranteed 1% Voltage
Reference Accuracy Over Line,
Load, And Temperature
(LX8385B)
Guaranteed < 1.5V Headroom At
3A (LX8385)
Guaranteed < 1.3V Headroom At
3A (LX8385A/8385B)
0.015% Line Regulation
0.15% Load Regulation
APPLICATIONS
High Efficiency Linear
Regulators
Post Regulators For Switching
Power Supplies
Battery Chargers
Constant Current Regulators
Graphics & Standard Supplies
Processor I/O Supply
Low Voltage Memory & Chipset
Supplies
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
IN
5V
+
*1500碌F
6MV1500GX
Sanyo
LX8385A
ADJ
OUT
121
惟
1%
+
3.3V
at 3A
PART #
LX8385/85A/85B-00
OUTPUT
VOLTAGE
Adjustable
3.3V
5.0V
1500碌F
2x 6MV1500GX
Sanyo
LX8385/85A/85B-33
LX8385/85A/85B-05
200
惟
1%
Table 1
- Available Options
T
A
(擄C)
PACKAGE ORDER INFO
Plastic TO-220
Plastic TO-252
Max Ref Max Dropout
DT
(D-Pak) 3-Pin
P
3-Pin
Accuracy
Voltage
RoHS Compliant
RoHS Compliant
Transition DC: 0532
Transition DC: 0543
LX8385
X
LX8385
X
DD
Plastic TO-263
3-Pin
RoHS Compliant
Transition DC: 0535
0 to 125
-25 to 125
2.0%
2.0%
1.0%
2.0%
1.5V
1.3V
1.3V
1.5V
LX8385-xxCDT
LX8385A-xxCDT
LX8385B-xxCDT
LX8385-xxIDT
LX8385-xxCP
LX8385A-xxCP
LX8385B-xxCP
LX8385-xxIP
LX8385-xxCDD
LX8385A-xxCDD
LX8385B-xxCDD
LX8385-xxIDD
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX8385-xxCP-TR)
Copyright
漏
2000
Rev. 2.0b, 2005-10-25
Microsemi Inc.
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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