spx1585at-tr Exar Corporation, spx1585at-tr Datasheet

spx1585at-tr

Manufacturer Part Number

spx1585at-tr

Description

5a Low Dropout Voltage Regulator

Manufacturer

Exar Corporation

Datasheet

1.SPX1585AT-TR.pdf (7 pages)

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FEATURES

• Adjustable Output Down To 1.2V

• Fixed Output Voltages 1.5V, 2.5V, 3.3V

• Output Current Of 5A

• Low Dropout Voltage 1.1V Typ @ 5A.

• Extremely Tight Load And Line Regulation

• Current & Thermal Limiting

• Standard 3-Terminal Low Cost TO-220 & TO-263

• Similar To Industry Standard LT1085/LT1585

PRODUCT DESCRIPTION

The SPX1585 i s a low power 5A adjustable and fixed voltage regulator that i s very easy to use. It requires only 2 exte rnal resistors to set

the output voltage for the adjustable version. The SPX1585 devices are designed for low voltage applications that offe r lower dropout

voltage and faster transient response. This device is an excellent choice for use in powering low voltage microprocess or s that require a

lower dropout, faster transient response to regulate from +2.5V to 3.8V supplies , and as a post regulator for switching supplies applica-

tions. The SPX1585 features low dropout of a maximum 1.2 volts.

The SPX1585 offers full protection against over-current faults, reversed input polarity, reversed load insertion, and p ositive and negative

transient voltage. On-Chip trimming adjusts the reference voltage to 1%. The I

efficiency.

The SPX1585 devices are offered in a 3-pin TO-220 and TO-263 package compatible with other 3 terminal regulators. For a n 8A low

dropout regulator , refer to the SPX1584 data sheet.

Now Available in Lead Free Packaging

TO-263-3 (T)

Note that TAB is connected to VOUT for both package types.

Top View

SPX1585

PIN CONNECTIONS

ADJ/GND

OUT

5A Low Dropout Voltage Regulator

APPLICATIONS

• Powering VGA & Sound Card

• Power PC Supplies

• SMPS Post-Regulator

• High Efficiency “Green” Computer Systems

• High Efficiency Linear Power Supplies

• Portable Instrumentation

• Constant Current Regulators

• Adjustable Power Supplies

• Battery charger

TO-220-3 (U)

Front View

of this device flows into the load, w hich increases

SPX1585

Adjustable & Fixed Output,

ADJ/GND

OUT

Fast Response

D ate: 05/14/04

SPX1585

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spx1585at-tr Summary of contents

Page 1

FEATURES • Adjustable Output Down To 1.2V • Fixed Output Voltages 1.5V, 2.5V, 3.3V • Output Current Of 5A • Low Dropout Voltage 1.1V Typ @ 5A. • Extremely Tight Load And Line Regulation • Current & Thermal Limiting • ...

Page 2

ABSOLUTE MAXIMUM RATINGS Lead Temp. (Soldering, 10 Seconds) .............................. 300°C Storage Temperature Range ............................ -65° to +150°C Operating Junction Temperature Range SPX1585 Control Section.......................... -45°C +125°C SPX1585 Power Transistor.........................-45°C +150°C ELECTRICAL CHARACTERISTICS PARAMETER 1.5V Version Output Voltage (Note 2) SPX1585-1.5V, ...

Page 3

APPLICATION HINTS The SPX1585 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage s . However, the use of an output capacitor is required in order to insure the stability and the ...

Page 4

Basic Adjustable Regulator V IN SPX1585 ADJ I ADJ 50uA OUT REF 2 1 Fig.2 Basic Adjustable Regulator Output Voltage Consider Figure 2. The resistance R current flow, ...

Page 5

TYPICAL APPLICATIONS V IN SPX1585 ADJ Fig Current output Regulator (Note SPX1585 + 10µF ADJ *C improves ripple rejection should ripple frequency. 1 Note A: ...

Page 6

TYPICAL CHARACTERISTICS SPX1585 D ate: 05/14/04 ...

Page 7

... SPX1585U-3.3 SPX1585AU SPX1585AU-1.5 SPX1585AU-2.5 SPX1585AU-3.3 SPX1585T SPX1585T-1.5 SPX1585T-2.5 SPX1585T-3.3 SPX1585AT SPX1585AT-1.5 SPX1585AT-2.5 SPX1585AT-3.3 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com 233 South Hillview Drive Milpitas, CA 95035 ...

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