SPX1582T5-L/TR Exar Corporation, SPX1582T5-L/TR Datasheet

SPX1582T5-L/TR

Manufacturer Part Number

SPX1582T5-L/TR

Description

3A Ultra Low Dropout Voltage Regulator

Manufacturer

Exar Corporation

Datasheet

1.SPX1582T5-LTR.pdf (7 pages)

Specifications of SPX1582T5-L/TR

Regulator Topology

Positive Adjustable

Voltage - Output

1.25 V ~ 6 V

Voltage - Input

Up to 6V

Voltage - Dropout (typical)

0.4V @ 3A

Number Of Regulators

Current - Output

Current - Limit (min)

3.1A

Operating Temperature

0°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

TO-263-6, D²Pak (5 leads + Tab), TO-263BA

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

SPX1582T5-L/TR

Manufacturer:

SIPEX

Quantity:

20 000

Current page: 1 of 7
Download datasheet (206Kb)

FEATURES

■ 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

APPLICATIONS

■ 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

Adjustable Regulator

Jun 17-06 Rev F

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

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 in 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 supply applications.

The SPX1582 offers protection against over-current faults, reversed input polarity, over temperature operation and

positive or negative transient voltages.

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

CTRL

330μF

CTRL

10μF

3A Ultra Low Dropout Voltage Regulator

(1) V

(2) V

(3) V

SPX1582

CTRL

OUT

REF

ADJ

.033μF

is measured across adjust to sense.

= V

needed when V

REF

Fast Response, Adjustable & Fixed

(1+R

SENSE

OUT

)+I

< 5V.

SPX1582 3A Ultra Low Dropout Voltage Regulator

ADJ

Processor

124Ω

2x330μF

2.5V

OUT

Now Available in Lead Free Packaging

3.3V

CTRL

Typical Fixed Regulator

TYPICAL APPLICATIONS CIRCUIT

5 Pin TO-263

SPX1582

330μF

CTRL

10μF

(1) V

SPX1582

CTRL

GND

needed when V

SPX1582

5 Pin TO-220

OUT

SENSE

DESCRIPTION

< 5V.

4 5

2x330μF

2.5V

OUT

Related parts for SPX1582T5-L/TR

SPX1582T5-L/TR Summary of contents

Page 1

Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed FEATURES ■ 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 ...

Page 2

Power Dissipation ..................................... Internally Limited Storage Temperature Range ..................... -65°C to +150°C Operating Junction Temperature Range SPX1582 Control Section ............................. 0°C to +125°C SPX1582 Power Transistor .......................... 0°C to +150°C Input Supply Voltage ................................................ 6V Electrical characteristics ...

Page 3

PIN NUMBER PIN NAME 1 SENSE 2 ADJ 3 V OUT 4 V CTRL Note that TAB is internally connected to Pin 3. (4) V CTRL CURRENT LIMIT AMPLIFIER THERMAL OVERLOAD VOLTAGE REGULATION AMPLIFIER Jun 17-06 Rev ...

Page 4

The SPX1582 is designed as a high performance and low cost solution for applications requiring a lower dropout than traditional NPN regulators. The SPX1582 uses a separate input voltage ≥ 1.3V) to minimize the dropout ...

Page 5

Page 6

E E FRONT VIEW Thermal Pad BACK VIEW E1 Jun 17-06 Rev F L1 Chamfer D Optional SIDE VIEW Gauge Plane θ Pin TO-263 JEDEC TO-263 (L1) Dimensions in Inches: Controlling ...

Page 7

... SPX1582U5 ............................... 2.0% ............................. Adj .......................... 5-Pin TO-22 0 SPX1582U5-2-5 ......................... 2.0% ............................ 2.5V ........................ 5-Pin TO-220 SPX1582U5-2-8 ......................... 2.0% ............................ 2.8V ........................ 5-Pin TO-220 SPX1582U5-3-3 ......................... 2.0% ............................ 3.3V ........................ 5-Pin TO-220 SPX1582T5 ................................ 2.0% ............................. Adj .......................... 5-Pin TO-2 63 SPX1582T5/TR .......................... 2.0% ............................. Adj .......................... 5-Pin TO-263 SPX1582T5-1-5 ......................... 2.0% ............................ 2.5V ........................ 5-Pin TO-263 SPX1582T5-1-5/TR.................... 2.0% ............................ 2.5V ........................ 5-Pin TO-263 SPX1582T5-1-8 ......................... 2.0% ............................ 2.5V ........................ 5-Pin TO-263 SPX1582T5-1-8/TR ...

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