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NIKO-SEM 3A Adjustable Low Dropout L1085
Linear Regulator (LDO) TO-252,263,220
GENERAL DESCRIPTION FEATURES
The L1085 is a positive and low dropout Very easy to use, it requires only two
three-terminal voltage regulator with 3A out- external resistors to set the output voltage
put current capability. This device is design- Low dropout voltage:
ed for use in low voltage applications that 1.3V typical at up to 3A
offers lower dropout voltage and faster tran- Low ground current
sient response. Fast transient response
This device is fully protected against over Current & thermal limiting
current faults, over temperature operation, Line regulation: 0.5% typical
reversed input polarity, reversed lead insert- Load regulation: 0.5% typical
TO-220, TO-263 and TO-252 packages
ion, transient voltage spike ...etc.
On-Chips trimming the reference voltage to APPLICATIONS
1% and features the low dropout of maxi-
mum 1.45 volts. High current microprocessor supplies
Low voltage logic supply
The L1085 Series regulators are available
Powering VGA & sound card
in the popular industry standard TO-220
Portable instrumentation
TO-263 and TO-252 packages.
Constant current regulator
Post regulator for switching power supply
TYPICAL APPLICATION
Vin L1085 Vout
IN OUT
ADJ
Vref
R1
Cin Cout
+ +
10uF 10uF
R2
Iadj
Vo = Vref (1+R2/R1) + Iadj x R2
1. Cin needed if device is far from from filter capacitors.
2. Cout required for stability.
- Basic Adjustable Regulator Circuit -
1 MAY-31-2001
NIKO-SEM 3A Adjustable Low Dropout L1085
Linear Regulator (LDO) TO-252,263,220
ABSOLUTE MAXIMUM RATINGS
Operating Junction
Maximum Supply Voltage 7V Temperature Range 0 to 125