SPX1582T5/TR Sipex Corporation, SPX1582T5/TR Datasheet
SPX1582T5/TR
Manufacturer Part Number
SPX1582T5/TR
Description
Manufacturer
Sipex Corporation
Datasheet
1.SPX1582U5-2.5.pdf
(7 pages)
Specifications of SPX1582T5/TR
Case
TO263/5
Date_code
00+
FEATURES
APPLICATIONS
Adjustable Regulator
The SPX1582 is a 3A Low Dropout Regulator with extremely low dropout voltage. The adjustable version requires only
two external resistors to set the output voltage. The fixed version has a preset output of 3.3V, 2.8V or 2.5V and does
not require any external resistors. The SPX1582 features a low dropout of 400mV(Typ.) and offers fast transient
response. This device is suitable for Pentium applications requiring 2.8V, 2.5V from 3.3V ATX power supplies, where
a low current input voltage 1V greater than the output voltage is needed. With an external sense pin the load regulation
is less than 1mV. This device is an excellent choice for the use of powering low voltage microprocessors that require
a lower dropout, fast transient response to regulate from 3.3V and 5V supplies. The SPX1582 is also an excellent choice
as a post regulator for switching supplies applications.
The SPX1582 offers protection against over-current faults, reversed input polarity, over temperature operation and
positive and negative transient voltage.
The SPX1582 is offered in a 5 pin TO-220 and TO-263 compatible with industry standard 5-terminal regulators. For 5A,
3A and 1.5A ultra low dropout versions refer to SPX1581, SPX1582 and SPX1583 data sheets respectively.
3.3V
V
5V
V
Date:5/25/04
IN
CTRL
Low Dropout Voltage 500mV at 3A Full Load Current
Adjustable Ouput Down to 1.25V from ATX Power Supply
Fixed Output Voltages of 3.3V and 2.5V
Extremely Tight Load and Line Regulation
Standard 5-Terminal Low Cost TO-220 and TO-263
3.3V to 2.8V ATX Power Supplies
3.3V to 2.9V for Portable PENTIUM
5V to 3.5V VRE Supply
High efficiency "Green" Computer Systems
C1
330µF
V
IN
V
CTRL
C2
10µF
5
4
(1) V
(2) V
(3) V
SPX1582
®
2
CTRL
OUT
REF
ADJ
C3
.033µF
is measured across adjust to sense.
= V
needed when V
3
REF
1
(1+R
SENSE
V
OUT
2
/R
1
IN
)+I
SPX1582 3A Ultra Low Dropout Voltage Regulator
TM
< 5V.
ADJ
Processor
3A Ultra Low Dropout Voltage Regulator
R
R1
124Ω
R2
124Ω
2
.
C4
2x330µF
2.5V
V
OUT
1
Fast Response, Adjustable & Fixed
Now Available in Lead Free Packaging
3.3V
V
5V
V
IN
CTRL
Typical Fixed Regulator
TYPICAL APPLICATIONS CIRCUIT
1
5 Pin TO-263
SPX1582
C1
330µF
2
V
CTRL
C2
10µF
V
3
IN
5
4
(1) V
SPX1582
2
CTRL
©Copyright 2004 Sipex Corporation
GND
needed when V
3
1
SPX1582
1
V
SPX1582
5 Pin TO-220
OUT
SENSE
2
DESCRIPTION
3
IN
< 5V.
4 5
C4
2x330µF
2.5V
V
OUT
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