A Product Line of
Diodes Incorporated
AS78XXA
1A 3-TERMINAL POSITIVE VOLTAGE REGULATOR
Description Features
The AS78XXA series are three terminal positive voltage regulators Output Current up to 1A
designed for a wide variety of applications including local, on-card
Fixed Output Voltages of 5V, 6V, 8V, 9V, 12V, 15V and 18V
regulation.
Output Voltage Accuracy of 4% over the Full Temperature
Range
The AS78XXA are complete with internal current limiting, thermal
Internal Short Circuit Current Limiting
shutdown protection, and safe-area compensation which make them
Internal Thermal Overload Protection
virtually immune from output overload. If adequate heat sinking is
Output Transistor Safe-area Protection
provided, these regulators can deliver output currents up to 1A.
Low Load Regulation
Stable Performance in High Temperature
The AS78XXA are available in TO-252-2 (3), TO-252-2 (4), TO-252-2
TO-220-3 and TO-220F-3
(5), TO-220-3 and TO-220F-3 packages.
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Lead-Free Packages: TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
Applications
Totally Lead-Free; RoHS Compliant (Notes 4 & 2)
Available in Green Packages: TO-220-3 and TO-220F-3
High Efficiency Linear Regulator
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Post Regulation for Switching Supply
Halogen and Antimony Free. Green Device (Note 3)
Microprocessor Power Supply
Lead-Free Packages, Available in Green Molding Compound:
Mother Board
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
A Product Line of
Diodes Incorporated
AS78XXA
Pin Assignments (Cont.)
D Package
(TO-252-2 (3)) (Option 1) (TO-252-2 (3)) (Option 2)
3 OUTP UT
3 OUTP UT
2 GND
2 GND
INPUT
1
INPUT
1
(TO-252-2 (4)) (TO-252-2 (5))
3
OUTPUT 3 OUTPUT
2 2
GND GND
1
1 INPUT
INPUT
Typical Applications Circuit
AS78XXA
V V
1
IN 3 OUT
INPUT OUTPUT
GND
0.33F 0.1F
2
Pin Descriptions
Pin Number Pin Name Function
1 INPUT Voltage Input
2 GND Ground
3 OUTPUT Voltage Output
2 of 23 September 2013
AS78XXA
Diodes Incorporated
www.diodes.com
Document number: DS36562 Rev. 3 - 2