AS78XXA
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, TO-220-3 (2) and TO-220F-3 packages.
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, TO-220-3 (2) and TO-220F-3
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Totally Lead-Free; RoHS Compliant (Notes 4 & 2)
Lead-Free Packages: TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
Available in “Green” Packages: TO-220-3, TO-220-3 (2) and TO-
220F-3
Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
High Efficiency Linear Regulator
Post Regulation for Switching Supply
Microprocessor Power Supply
Mother Board
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) & 2015/863/EU (RoHS 3) compliant. All applicable RoHS exemptions applied.
2. See https://www.diodes.com/quality/lead-free/ 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) & 2015/863/EU (RoHS 3) compliant.
Pin Assignments
(Front View)
(Front View)
3
2
1
OUTPUT
GND
INPUT
3
2
1
OUTPUT
GND
INPUT
TO-220-3 (Option 1)
TO-220-3 (Option 2)
AS78XXA
Document number: DS36562 Rev. 5 - 2
1 of 27
www.diodes.com
March 2018
© Diodes Incorporated
AS78XXA
Absolute Maximum Ratings
(Note 5)
Symbol
V
IN
T
LEAD
P
D
T
J
T
STG
Input Voltage
Lead Temperature (Soldering, 10sec)
Power Dissipation
Operating Junction Temperature
Storage Temperature Range
Parameter
Rating
36
+260
Internally Limited
+150
-65 to +150
TO-220-3/TO-220-3 (2)
JA
Thermal Resistance
TO-252-2 (3)/TO-252-2
(4)/TO-252-2 (5)
TO-220F-3
ESD
ESD
Note 5:
Unit
V
°
C
W
°
C
°
C
60
100
60
°
C/W
ESD (Human Body Model)
ESD (Machine Model)
6000
500
V
V
Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
Parameter
AS7805A
AS7806A
AS7808A
V
IN
Input Voltage
AS7809A
AS7812A
AS7815A
AS7818A
T
J
Operating Junction Temperature Range
Min
—
—
—
—
—
—
—
-40
Max
25
26
28
29
32
32
32
+125
°
C
V
Unit
AS78XXA
Document number: DS36562 Rev. 5 - 2
4 of 27
www.diodes.com
March 2018
© Diodes Incorporated
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