LX8385x-xx
ꢀꢁꢂꢃꢁꢂꢁꢄꢅꢆ
3A Low Dropout Positive Regulators
A
M I C R O S E M I
C O M P A N Y
PRODUCTION DATA SHEET
Three-Terminal Adjustable Or
Fixed Output
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 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
Mcrosemi
.
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
High Efficiency Linear
Regulators
Post Regulators For Switching
Power Supplies
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
Battery Chargers
Constant Current Regulators
Graphics & Standard Supplies
Processor I/O Supply
Low Voltage Memory & Chipset
Supplies
Options table below.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
IN
OUT
3.3V
5V
LX8385A
at 3A
+
LX8385/85A/85B-00
LX8385/85A/85B-33
LX8385/85A/85B-05
Adjustable
3.3V
121Ω
*1500µF
1%
6MV1500GX
Sanyo
ADJ
+
1500µF
2x 6MV1500GX
Sanyo
5.0V
200Ω
1%
Table 1
- Available Options
Max Ref Max Dropout
Plastic TO-220 Plastic TO-263
DD
3-Pin 3-Pin
Plastic TO-252
(D-Pak) 3-Pin
TA (°C)
DT
P
Accuracy
Voltage
0 to 125
2.0%
2.0%
1.0%
1.5V
1.3V
1.3V
1.5V
LX8385-xxCDT
LX8385A-xxCDT
LX8385B-xxCDT
LX8385-xxIDT
LX8385-xxCP
LX8385-xxCDD
LX8385A-xxCDD
LX8385B-xxCDD
LX8385-xxIDD
LX8385A-xxCP
LX8385B-xxCP
LX8385-xxIP
-25 to 125 2.0%
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8385-xxCPT)
Copyright 2000
Rev. 2.0a, 2001-03-15
Microsemi
Page 1
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570