SPX1582T5 Sipex Corporation, SPX1582T5 Datasheet

SPX1582T5

Manufacturer Part Number

SPX1582T5

Description

Manufacturer

Sipex Corporation

Datasheet

1.SPX1582T5.pdf (5 pages)

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FEATURES

• Low Dropout Voltage 500mV at 3A Full Load Current

• Fixed Output Voltages of 3.3V, 2.8V & 2.5V

• Adjustable Output Down to 1.2V from ATX Power Supply

• Extremely Tight Voltage and Line Regulation

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

PRODUCT DESCRIPTION

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 less than 400mV(typ.) and offers fast transient response. This device is suitable

for Pentium applications requiring 2.8V or 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 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 supplies applications.

The SPX1582 offers full 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 7A, 5A and 1.5A

ultra low dropout versions refer to SPX1580, SPX1581 and SPX1583 data sheets respectively.

TO-263-5 (T)

1 2 3

SPX1582

Top View

4 5

PIN CONNECTIONS

1. SENSE

2. ADJ or FIXED

3. V

4. V

5. V

OUT

CTRL

3A Ultra Low Dropout Voltage Regulator

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

SPX1582

1. SENSE

3. V

4. V

2. ADJ or FIXED

5. V

OUT

CTRL

SPX1582

Rev. 10/30/00

Related parts for SPX1582T5

SPX1582T5 Summary of contents

Page 1

FEATURES • Low Dropout Voltage 500mV at 3A Full Load Current • Fixed Output Voltages of 3.3V, 2.8V & 2.5V • Adjustable Output Down to 1.2V from ATX Power Supply • Extremely Tight Voltage and Line Regulation • Standard 5-Terminal ...

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 SPX1582 Control Section .............................................0ºC to +125ºC SPX1582 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 SPX1582 V CTRL SENSE ADJ C2 10uF C3 .033uF (1) V needed when V ...

Page 5

... FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. ...

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