AS1582T Sipex Corporation, AS1582T Datasheet

AS1582T

Manufacturer Part Number

AS1582T

Description

AS1582T3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed

Manufacturer

Sipex Corporation

Datasheet

1.AS1582T.pdf (4 pages)

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Company:

BOSTOCK HK LIMITED

Part Number:

AS1582T

Manufacturer:

Company:

Meier Automation Equipment Co., Limited

Part Number:

AS1582T

Manufacturer:

ALPHA

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20 000

Company:

BOSTOCK HK LIMITED

Part Number:

AS1582T-2.5

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Meier Automation Equipment Co., Limited

Part Number:

AS1582T-2.5

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ALPHA

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20 000

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Meier Automation Equipment Co., Limited

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AS1582T-3.3

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ALPHA

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20 000

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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 AS1582 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 AS1582 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 AS1582 is also an excellent choice as a post regulator for switching supplies applications.

The AS1582 offers full protection against over-current faults, reversed input polarity, over temperature operation and positive and

negative transient voltage.

The AS1582 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 AS1580, AS1581 and AS1583 data sheets respectively.

ORDERING INFORMATION

Consult with factory for other fixed output voltages.

X= Output Voltage (3.3V, 2.8V or 2.5V)

AS1582U-X

AS1582U

TO-22O

5-PIN

AS1582T-X

AS1582T

TO-263

5-PIN

TO-263-5 (T)

1 2 3

Top View

AS1582

Adjustable

OUTPUT

Fixed

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

AS1582

1. SENSE

3. V

4. V

2. ADJ or FIXED

5. V

OUT

CTRL

AS1582

Rev. 10/2/00

Related parts for AS1582T

AS1582T Summary of contents

Page 1

... TO-22O TO-263 5-PIN 5-PIN AS1582U AS1582T AS1582U-X AS1582T-X Consult with factory for other fixed output voltages. X= Output Voltage (3.3V, 2.8V or 2.5V) 3A Ultra Low Dropout Voltage Regulator Fast Response, Adjustable & Fixed APPLICATIONS • 3.3V to 2.8V ATX Power Supplies • 3.3V to 2.9V for Portable PENTIUM    Processor • ...

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 AS1582 Control Section................................................0ºC to +125ºC AS1582 Power Transistor .............................................0ºC to +150ºC ELECTRICAL CHARACTERISTICS (Boldface applies over ...

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 AS1582 V CTRL SENSE ADJ C2 10uF C3 .033uF (1) V needed when V ...

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