1
3A Fixed Low Dropout
Linear Regulator (LDO)
L1085-3.3
TO-252,263,220
JUL-05-2001
NIKO-SEM
GENERAL DESCRIPTION
The L1085 is a positive and low dropout
three-terminal voltage regulator with 3A out-
put current capability. This device is design-
ed for use in low voltage applications that
offers lower dropout voltage and faster tran-
sient response.
This device is fully protected against over
current faults, over temperature operation,
reversed input polarity, reversed lead insert-
ion, transient voltage spike …etc.
On-Chips trimming the reference voltage to
1% and features the low dropout of maxi-
mum 1.50 volts.
The L1085 Series regulators are available
in the popular industry standard TO-263
TO-220 and TO-252 packages.
FEATURES
Very easy to use, it requires only two
external resistors to set the output voltage
Low dropout voltage:
1.3V typical at up to 3A
Low ground current
Fast transient response
Current & thermal limiting
Line regulation: 0.5% typical
Load regulation: 0.5% typical
TO-263, TO-220 and TO-252 packages
APPLICATIONS
High current microprocessor supplies
Low voltage logic supply
Powering VGA & sound card
Portable instrumentation
Constant current regulator
Post regulator for switching power supply
TYPICAL APPLICATION
Vin>4.75V
Vout=3.3V
OUT
GND
Cin
10uF
Cout
10uF
RL
L1085-3.3
IN
Basic Fixed Output Regulator Circuit
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