spx1583t5-tr Exar Corporation, spx1583t5-tr Datasheet

spx1583t5-tr

Manufacturer Part Number

spx1583t5-tr

Description

1.5a Ultra Low Dropout Voltage Regulator

Manufacturer

Exar Corporation

Datasheet

1.SPX1583T5-TR.pdf (5 pages)

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FEATURES

• Low Dropout Voltage 500mV at 1.5A Full Load Current

• Adjustable Output Down to 1.2V from ATX Power Supply

• Fixed Output Voltages of 3.3V, 2.8V, 2.5V, and 1.5V

• Extremely Tight Voltage and Line Regulation

• Standard 5-Terminal Low Cost TO-220 & TO-263

PRODUCT DESCRIPTION

The SPX1583 is a 1.5A Low Dropout Regulator with extremely low dropout voltage. The adjustable version requires only t wo

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 SPX1583 features a low dropout of less than 400mV(typ.) and offers fast transient response. T his device is

suitable for Pentium applications requiring 2.8V or 2.5V from 3.3V ATX power supplies, where a low current input voltag e 1V

greater than the output voltage is needed. With an external sense pin the load regulation is less than 1mV. This devi ce is an excellent

choice for the use in powering low voltage microprocessors that require a lower dropout, fast transient response to reg ulate from 3.3V

and 5V supplies. The SPX1583 is also an excellent choice as a post regulator for switching supplies applications.

The SPX1583 offers full protection against over-current faults, reversed input polarity, over temperature operation and positive and

negative transient voltage.

The SPX1583 is offered in a 5 pin TO-220 and TO-263 compatible with industry standard 5-terminal regulators. For 7A, 5 A and 3A

ultra low dropout versions refer to SPX1580, SPX1581 and SPX1582 data sheets respectively.

TO-263-5 (T)

1 2 3

SPX1583

Top View

4 5

PIN CONNECTIONS

1. SENSE

2. ADJ or FIXED

3. V

4. V

5. V

OUT

CTRL

1.5A Ultra Low Dropout Voltage Regulator

N ow Available in Lead Free Packaging

APPLICATIONS

• 3.3V to 2.8V ATX Power Supplies

• 3.3V to 2.9V for Portable PENTIUM    Processor

• 5V to 3.5V VRE Supply

• High Efficiency “Green” Computer Systems

Fast Response, Adjustable & Fixed

TO-220-5 (U)

Front View

SPX1583

1. SENSE

3. V

4. V

2. ADJ or FIXED

5. V

OUT

CTRL

SPX1583

D ate: Jun 24-04

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spx1583t5-tr Summary of contents

Page 1

FEATURES • Low Dropout Voltage 500mV at 1.5A Full Load Current • Adjustable Output Down to 1.2V from ATX Power Supply • Fixed Output Voltages of 3.3V, 2.8V, 2.5V, and 1.5V • Extremely Tight Voltage and Line Regulation • Standard ...

Page 2

ABSOLUTE MAXIMUM RATINGS Power Dissipation.................................................... Internally Limited Lead Temp (soldering, 10 seconds)........................................... 300°C Storage Temperature Range ...................................... -65ºC to +150ºC Operating Junction Temperature Range SPX1583 Control Section .............................................0ºC to +125ºC SPX1583 Power Transistor ...........................................0ºC to +150ºC ELECTRICAL CHARACTERISTICS (Boldface applies ...

Page 3

PIN DESCRIPTION 1. Sense = Allows Kelvin sense of V device). 2. ADJ = Negative side of the reference voltage for the device. Adding a small bypass capacitor from the ADJ pin to ground will improve the transient response. 3. ...

Page 4

TYPICAL APPLICATION 3. 330uF 5V V CTRL 3. 330uF 5V V CTRL Fig. 1 Adjustable Regulator OUT SPX1583 V CTRL SENSE ADJ C2 10uF C3 .033uF (1) V needed when V ...

Page 5

... SPX1583T SPX1583T SPX1583T SPX1583T SPX1583T Available in lead free packaging. To order add "-L" suffix to part number. Example: SPX1583T5-3-3/TR = standard; SPX1583T5-L-3-3/TR = lead free. /TR = Tape and Reel Pack quantity is 500 for TO-263. Corporation ANALOG EXCELLENCE Sipex Corporation ...

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