®
SPX2815
1.5A Low Dropout, Adjustable and Fixed Output Voltage
Regulator
features
s
Guaranteed 1.5A Output
Current
s
Adjustable Output Down To
1.2V
s
Fixed Output Voltages 2.5V,
3.3V, 5.0V
s
1% and 2% Output Accuracy
s
Low Dropout Voltage 1.1V typ.
s
Extremely Tight Load and Line
Regulation
s
Current and Thermal Limiting
s
Standard 3-Terminal Low Cost
TO-220, TO-263 and TO-252
s
Similar to Industry Standard
LT1086/LT1586
description
The SPX2815 is a low power 1.5A that is available in either an
adjustable or fixed output voltage version. It requires only 2 external
resistors to set the output voltage for the adjustable version. This
device is an excellent choice for use in powering low voltage micro-
processor that require a lower dropout voltages and faster transient or
as a post regulator for switching supply applications. The SPX2815
has a very low quiescent current and a low dropout voltage of 1.2V at
full load. The SPX2815 features over current limit and protection
against over-current faults, reversed input polarity, reversed load inser-
tion, and positive and negative voltage transients.
The SPX2815 is offered in industry standard 3-pin TO-220, TO-263
and TO-252 packages.
P
typical application circuits
Basic Fixed Regulator
V
IN
5V
V
OUT
3.3V
applications
s
s
s
s
s
s
s
s
s
Powering VGA and Sound Card
PowerPC Supplies
SMPS Post-Regulator
High Efficiency “Green”
Computer Systems
High Efficiency Linear Power
Supplies
Portable Instrumentation
Constant Current Regulators
Adjustable Power Supplies
Battery Charger
SPX2815
C1
10µF
C1
10µF
Basic Adjustable Regulator
V
OUT
SPX2815
V
REF
I
ADJ
50µA
V
OUT
R
1
R
2
V
OUT
= V
REF
* ( 1 + R
2
/R
1
) + I
ADJ
* R
2002 Short Form Catalog
P-139
2
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