LX8385A-00CDD Datasheet, PDF (1/11 Pages) Microsemi Corporation – 3A Low Dropout Positive Regulators

LX8385x-xx
TM
®
3A Low Dropout Positive Regulators
PRODUCTION DATA SHEET
DESCRIPTION
The LX8385/85A/85B Series ICs are The LX8385/85A/85B Series devices are
positive regulators designed to provide 3A pin-compatible with earlier 3-terminal
output current. These regulators yield regulators, such as the 117 series products,
higher efficiency than currently available but they do require input and output
devices with all internal circuitry designed capacitors. A minimum 10µF capacitor is
to operate down to a 1V input-to-output required on the input and a 15µF or greater
differential. In each of these products, the on the output of these new devices for
dropout voltage is fully specified as a stability. Although, these capacitors are
function of load current. Dropout is generally included in most regulator designs.
guaranteed at a maximum of 1.3V The LX8385/85A/85B Series quiescent
(8385A/B) and 1.5V (8385) at maximum current flows into the load, thereby
output current, decreasing at lower load increasing efficiency. This feature contrasts
currents.
with PNP regulators where up to 10% of the
In addition, on-chip trimming adjusts the output current is wasted as quiescent
reference voltage tolerance to 1% maximum current.
at room temperature and 2% maximum over The LX8385-xxI is specified over the
the 0 to 125°C range for the LX8385A. The industrial temperature range of -25°C to
LX8385B offers 0.8% tolerance at room 125°C, while the LX8385-xxC / 85A-xxC /
temperature and 1.0% maximum over line, 85B-xxC is specified over the commercial
load and temperature. Fixed versions are range of 0°C to 125°C.
also available and specified in the Available
Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
IN
5V
+
*1500µF
6MV1500GX
Sanyo
LX8385A
ADJ
OUT
121Ω
1%
200Ω
1%
3.3V
at 3A
+
1500µF
2x 6MV1500GX
Sanyo
KEY FEATURES
ƒ Three-Terminal Adjustable Or
Fixed Output
ƒ Guaranteed 1% Voltage
Reference Accuracy Over Line,
Load, And Temperature
(LX8385B)
ƒ Guaranteed < 1.5V Headroom At
3A (LX8385)
ƒ Guaranteed < 1.3V Headroom At
3A (LX8385A/8385B)
ƒ 0.015% Line Regulation
ƒ 0.15% Load Regulation
APPLICATIONS
ƒ High Efficiency Linear
Regulators
ƒ Post Regulators For Switching
Power Supplies
ƒ Battery Chargers
ƒ Constant Current Regulators
ƒ Graphics & Standard Supplies
ƒ Processor I/O Supply
ƒ Low Voltage Memory & Chipset
Supplies
PART #
OUTPUT
VOLTAGE
LX8385/85A/85B-00 Adjustable
LX8385/85A/85B-33
3.3V
LX8385/85A/85B-05
5.0V
Table 1 - Available Options
PACKAGE ORDER INFO
T_A (°C)
Max Ref
Max Dropout DT
Plastic TO-252
(D-Pak) 3-Pin
Accuracy Voltage
RoHS Compliant
Transition DC: 0532
Plastic TO-220
Plastic TO-263
P _3-Pin
DD _3-Pin
RoHS Compliant
Transition DC: 0543
RoHS Compliant
Transition DC: 0535
2.0%
1.5V
LX8385-xxCDT
LX8385-xxCP
LX8385-xxCDD
0 to 125 2.0%
1.3V
LX8385A-xxCDT
LX8385A-xxCP
LX8385A-xxCDD
1.0%
1.3V
LX8385B-xxCDT
LX8385B-xxCP
LX8385B-xxCDD
-25 to 125 2.0%
1.5V
LX8385-xxIDT
LX8385-xxIP
LX8385-xxIDD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8385-xxCP-TR)
Copyright © 2000
Rev. 2.0b, 2005-10-25
Microsemi Inc.
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
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