A Product Line of
Diodes Incorporated
AS78LXX
100mA POSITIVE VOLTAGE REGULATOR
Description
The AS78LXX series are three terminal positive regulators designed
for a wide variety of applications including local, on-card regulation.
This series of regulators 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 are provided, these regulators can deliver output currents up
to 100mA.
The AS78LXX series are available in TO-92 (bulk or ammo packing),
SOT-89 and SOIC-8 packages.
Features
Output Current up to 100mA
Fixed Output Voltages of 5V, 12V and 15V
Output Voltage Accuracy of ±5% over the Full Temperature
Range
Internal Short Circuit Current Limiting
Internal Thermal Overload Protection
No External Components
Output Transistor Safe-area Protection
DATA SHEET
Applications
Consumer Electronics
Microprocessor Power Supply
Mother Board
Pin Assignments
Z Package
(TO-92(Bulk Packing))
Z Package
(TO-92(Ammo Packing))
R Package
(SOT-89 Option 1)
3
2
1
INPUT
3
INPUT
3
GND
2
1
INPUT
GND
OUTPUT
GND
2
GND
OUTPUT
1
OUTPUT
R Package
(SOT-89 Option 2)
M Package
(SOIC-8)
3
GND
INPUT
OUTPUT
GND
GND
1
2
3
4
8
7
6
5
INPUT
GND
GND
NC
2
1
GND
OUTPUT
NC
AS78LXX
Document number: DSxxxxx Rev. 3 - 1
1 of 17
www.diodes.com
August 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS78LXX
Typical Applications Circuit
DATA SHEET
A (B)
A for 3-pin
B for 8-pin
Functional Block Diagram
A (B)
A for 3-pin
B for 8-pin
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© Diodes Incorporated
AS78LXX
Document number: DSxxxxx Rev. 3 - 1
A Product Line of
Diodes Incorporated
AS78LXX
Absolute Maximum Ratings
(Note 1)
Symbol
V
IN
T
J
Input Voltage
Operating Junction Temperature
Lead Temperature (Soldering, 10sec)
Power Dissipation
Storage Temperature Range
Thermal Resistance
ESD (Human Body Model)
ESD (Machine Model)
TO-92
2000
200
Parameter
Rating
36
150
260
750
-65 to 150
180
Unit
V
ºC
ºC
mW
ºC
ºC/W
V
V
DATA SHEET
T
LEAD
P
D
T
STG
JA
ESD
ESD
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 Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Symbol
Parameter
AS78L05
V
IN
Input Voltage
AS78L12
AS78L15
T
J
Operating Junction Temperature Range
-40
Min
Max
30
36
36
125
ºC
V
Unit
AS78LXX
Document number: DSxxxxx Rev. 3 - 1
3 of 17
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August 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS78LXX
Electrical Characteristics
AS78L05
(@ V
IN
=10V, I
OUT
=40mA,
specified.)
o
o
C
IN
=0.33µF, C
OUT
=0.1µF, T
J
=25ºC,
Bold
typeface applies over -40 C≤T
J
≤125
C, unless otherwise
Symbol
V
OUT
Parameter
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Ripple Rejection
Dropout Voltage
Output Noise Voltage
Output Voltage Temperature
Coefficient
Conditions
Min
4.8
Typ
5.0
Max
5.2
Unit
V
DATA SHEET
7V≤V
IN
≤20V,
1mA≤I
OUT
≤100mA,
P
D
≤0.75W
7V≤V
IN
≤20V
1mA≤I
OUT
≤100mA
4.75
8
10
3
5.25
150
60
5.5
1.5
0.1
mV
mV
mA
mA
dB
V
µV
mV/ C
ppm/
o
C
o
V
RLINE
V
RLOAD
I
Q
△I
Q
PSRR
V
DROP
N
O
△V
OUT
/△T
(△V
OUT
/V
OUT
)/
△T
8V≤V
IN
≤20V
1mA≤I
OUT
≤40mA
f=120Hz, 8V≤V
IN
≤18V
I
OUT
=40mA
I
OUT
=100mA
10Hz≤f≤100kHz (Note 2)
I
OUT
=5mA
TO-92
47
62
1.7
1.8
40
0.42
84
40
28.3
62
θ
JC
Thermal Resistance
SOT-89
SOIC-8
ºC/W
Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise.
AS78LXX
Document number: DSxxxxx Rev. 3 - 1
4 of 17
www.diodes.com
August 2013
© Diodes Incorporated
A Product Line of
Diodes Incorporated
AS78LXX
Electrical Characteristics
(Cont.)
AS78L05C
(@ V
IN
=10V, I
OUT
=40mA, C
IN
=0.33µF,
specified.)
o
o
C
OUT
=0.1µF, T
J
=25ºC,
Bold
typeface applies over -40 C≤T
J
≤125
C, unless otherwise
Symbol
V
OUT
V
RLINE
Parameter
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
Ripple Rejection
Dropout Voltage
Output Noise Voltage
Output Voltage Temperature
Coefficient
Conditions
Min
5.0
Typ
Max
5.1
Unit
V
mV
mV
mA
mA
dB
V
µV
mV/ C
ppm/ C
o
o
7V≤V
IN
≤20V
1mA≤I
OUT
≤100mA
8
10
3
150
60
5.5
1.5
0.1
DATA SHEET
V
RLOAD
I
Q
△I
Q
PSRR
V
DROP
N
O
△V
OUT
/△T
(△V
OUT
/V
OUT
)/
△T
8V≤V
IN
≤20V
1mA≤I
OUT
≤40mA
f=120Hz, 8V≤V
IN
≤18V
I
OUT
=40mA
I
OUT
=100mA
10Hz≤f≤100kHz (Note 2)
I
OUT
=5mA
TO-92
47
62
1.7
1.8
40
0.42
84
40
28.3
62
θ
JC
Thermal Resistance
SOT-89
SOIC-8
ºC/W
Note 2: 0.01µF minimum load capacitance is recommended to limit high frequency noise.
AS78LXX
Document number: DSxxxxx Rev. 3 - 1
5 of 17
www.diodes.com
August 2013
© Diodes Incorporated
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