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Diodes AS78XXA User Manual

As78xxa, Description, Applications

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AS78XXA

Document number: DS36562 Rev.

3 - 2

1 of 23

www.diodes.com

September 2013

© Diodes Incorporated

AS78XXA

A Product Line of

Diodes Incorporated

1A 3-TERMINAL POSITIVE VOLTAGE REGULATOR

Description

The AS78XXA series are three terminal positive voltage regulators
designed for a wide variety of applications including local, on-card
regulation.

The AS78XXA are complete with internal current limiting, thermal
shutdown protection, and safe-area compensation which make them
virtually immune from output overload. If adequate heat sinking is
provided, these regulators can deliver output currents up to 1A.

The AS78XXA are available in TO-252-2 (3), TO-252-2 (4), TO-252-2
(5), TO-220-3 and TO-220F-3 packages.

Applications

High Efficiency Linear Regulator

Post Regulation for Switching Supply

Microprocessor Power Supply

 Mother

Board


Features

Output Current up to 1A

Fixed Output Voltages of 5V, 6V, 8V, 9V, 12V, 15V and 18V

 Output Voltage Accuracy of ±4% over the Full Temperature

Range

Internal Short Circuit Current Limiting

Internal Thermal Overload Protection

 Output

Transistor

Safe-area

Protection

 Low

Load

Regulation

Stable Performance in High Temperature

 TO-220-3

and

TO-220F-3

Lead-Free Finish; RoHS Compliant (Notes 1 & 2)

Lead-Free Packages: TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)

Totally Lead-Free; RoHS Compliant (Notes 4 & 2)

Available in “Green” Packages: TO-220-3 and TO-220F-3

Lead-Free Finish; RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

Lead-Free Packages, Available in “Green” Molding Compound:
TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)

Totally Lead-Free & Fully RoHS Compliant (Notes 4 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)


Notes:

1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.
4. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

Pin Assignments


T Package T Package

(TO-220-3) (Option 1) (TO-220-3) (Option 2)




T Package TF Package

(TO-220-3) (Option 3) (TO-220F-3)




1

2

3

INPUT

OUTPUT

GND

1

2

3

INPUT

OUTPUT

GND

1

2

3

INPUT

OUTPUT

GND

1

2

3

OUTPUT

INPUT

GND