Preliminary Datasheet
3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR
General Description
The AS78XX series are three terminal positive regula-
tors designed for a wide variety of applications includ-
ing local, on-card regulation.
The AS78XX are complete with internal current limit-
ing, thermal shutdown protection, and safe-area com-
pensation which make them virtually immune from
output overload. If adequate heat sinking are provided,
these regulators can deliver output currents up to 1A.
The AS78XX are available in TO-220-3 and TO-252-2
packages.
AS78XX
Features
·
·
·
·
·
·
·
Output Current up to 1A
Fixed Output Voltages of 5V, 12V and 15V
Output Voltage Accuracy of
±4%
over the Full
Temperature Range
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
No External Components
Output Transistor Safe-area Protection
Applications
·
·
·
·
High Efficiency Linear Regulator
Post Regulation for Switching Supply
Microprocessor Power Supply
Mother Board
TO-220-3
TO-252-2
Figure 1. Package Types of AS78XX
Mar. 2006 Rev. 1. 0
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR
Pin Configuration
AS78XX
T Package
(TO-220-3)
D Package
(TO-252-2)
3
2
1
OUTPUT
GND
INPUT
3
2
1
OUTPUT
GND
INPUT
Figure 2. Pin Configuration of AS78XX (Top View)
Pin Description
Pin Number
Pin Name
Function
1
2
3
INPUT
GND
OUTPUT
Voltage Input
Ground
Voltage Output
Mar. 2006 Rev. 1. 0
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR
Functional Block Diagram
1
R9
Q9
Q14
R16
Q21
Q24
C1
R1
Q18
R12
Q3
Q6
Q10
R3
Q11
Q7
Q1
Q4
R4
Q8
R11
R5
R6
Q23
Q13
Q2
Q5
Q15
C2
Q19
Q12
R2
R8
R10
Q17
Q20
R19
R15
R7
Q16
R14
Q22
R18
R2
2
R17
R23
R20
R21
D1
Zener
INPUT
AS78XX
3
OUTPUT
R13
2
GND
Figure 3. Functional Block Diagram of AS78XX
Mar. 2006 Rev. 1. 0
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR
Ordering Information
-
E1: Lead Free
Circuit Type
TR: Tape and Reel
Blank: Tube
Output Voltage
05: 5V
12: 12V
15: 15V
Package
T: TO-220-3
D: TO-252-2
AS78XX
AS78XX
Package
Temperature
Range
Part Number
Tin Lead
Lead Free
AS7805T-E1
AS7812T-E1
AS7815T-E1
AS7805D-E1
AS7805DTR-E1
AS7812D-E1
AS7812DTR-E1
AS7815D-E1
AS7815DTR-E1
Marking ID
Tin Lead
Lead Free
AS7805T-E1
AS7812T-E1
AS7815T-E1
AS7805D-E1
AS7805D-E1
AS7812D-E1
AS7812D-E1
AS7815D-E1
AS7815D-E1
Packing Type
Tube
Tube
Tube
Tube
Tape & Reel
Tube
Tape & Reel
Tube
Tape & Reel
TO-220-3
-40 to 125
o
C
TO-252-2
-40 to 125
o
C
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2006 Rev. 1. 0
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
3-TERMINAL 1A POSITIVE VOLTAGE REGULATOR
Absolute Maximum Ratings (Note 1)
Parameter
Input Voltage
Lead Temperature (Soldering, 10sec)
Power Dissipation
Storage Temperature Range
ESD (Machine Model)
Symbol
V
IN
T
LEAD
P
D
T
STG
ESD
Value
35
260
Internally Limited
-65 to 150
400
Unit
V
o
C
AS78XX
W
o
C
V
Note 1: 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 Max-
imum Ratings" for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Operating Junction Temperature Range
Symbol
T
J
Min
-40
Max
125
Unit
o
C
Mar. 2006 Rev. 1. 0
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BCD Semiconductor Manufacturing Limited
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