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A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
3-Terminal Regulators
D
Output Current up to 100 mA
D
No External Components
D
Internal Thermal-Overload Protection
D
Internal Short-Circuit Current Limiting
D
Direct Replacements for Fairchild
A78L00
Series
description
This series of fixed-voltage integrated-circuit
voltage regulators is designed for a wide range of
applications. These applications include on-card
regulation for elimination of noise and distribution
problems associated with single-point regulation.
In addition, they can be used with power-pass
elements to make high-current voltage regulators.
One of these regulators can deliver up to 100 mA
of output current. The internal limiting and
thermal-shutdown features of these regulators
essentially make them immune to overload. When
used as a replacement for a zener diode-resistor
combination, an effective improvement in output
impedance can be obtained, together with lower
bias current.
The
A78L00C and
A78L00AC series are
characterized for operation over the virtual
junction temperature range of 0
C to 125
C. The
A78L05AI is characterized for operation over the
virtual junction temperature range of 40
C to
125
C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
D PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
OUTPUT
COMMON
COMMON
NC
INPUT
COMMON
COMMON
NC
LP PACKAGE
(TOP VIEW)
PK PACKAGE
(TOP VIEW)
NC No internal connection
INPUT
COMMON
OUTPUT
INPUT
COMMON
OUTPUT
TO226AA
The center lead is in electrical contact
with the tab.
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
AVAILABLE OPTIONS
PACKAGE
TJ
VO(NOM)
(V)
SMALL OUTLINE
(D)
PLASTIC CYLINDRICAL
(LP)
SOT-89
(PK)
J
(V)
OUTPUT VOLTAGE TOLERANCE
5%
10%
5%
10%
5%
10%
0
C
to
125
C
2.6
5
6.2
8
9
10
12
15
A78L02ACD
A78L05ACD
A78L08ACD
A78L09ACD
A78L10ACD
A78L12ACD
A78L15ACD
A78L05CD
A78L08CD



A78L02ACLP
A78L05ACLP
A78L06ACLP
A78L08ACLP
A78L09ACLP
A78L10ACLP
A78L12ACLP
A78L15ACLP
A78L05CLP

A78L09CLP


A78L05ACPK
A78L06ACPK
A78L08ACPK
A78L09ACPK
A78L10ACPK
A78L12ACPK
A78L15ACPK
A78L05CPK
A78L08CPK



40
C
to
125
C
5
A78L05AILP
D and LP packages are available taped and reeled. Add the suffix R to the device type (e.g.,
A78L05ACDR). The PK package is
only available taped and reeled (do not add the suffix R to the device type).
schematic
20 k
1 k
to 14 k
INPUT
OUTPUT
COMMON
NOTE A: Resistor values shown are nominal.
1.4 k
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over virtual junction temperature range (unless otherwise noted)
Input voltage, V
I
:
A78L02AC,
A78L05C
A78L09C,
A78L10AC 30
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A78L12C,
A78L12AC,
A78L15C,
A78L15AC 35
V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Notes 1 and 2): D package
97
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
LP package
156
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . .
PK package
52
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Virtual junction temperature, T
J
150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond 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-rated conditions for extended periods may affect device reliability.
NOTES:
1. Maximum power dissipation is a function of TJ(max),
JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) TA)/
JA. Operating at the absolute maximum TJ of 150
C can affect reliability. Due to
variations in individual device electrical characteristics and thermal resistance, the built-in thermal-overload protection may be
activated at power levels slightly above or below the rated dissipation.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
MAX
UNIT
A78L02AC
4.75
20
A78L05C,
A78L05AC
7
20
A78L06C,
A78L06AC
8.5
20
VI
Input voltage
A78L08C,
A78L08AC
10.5
23
V
VI
Input voltage
A78L09C,
A78L09AC
11.5
24
V
A78L10AC
12.5
25
A78L12C,
A78L12AC
14.5
27
A78L15C,
A78L15AC
17.5
30
IO
Output current
100
mA
TJ
Operating virtual junction temperature range
A78LxxC and
A78LxxAC series
0
125
C
TJ
Operating virtual junction temperature range
A78L05AI
40
125
C
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
I
= 9 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A78L02AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
UNIT
V
4 75 V to 20 V
I
1 mA to 40 mA
25
C
2.5
2.6
2.7
Output voltage
VI = 4.75 V to 20 V,
IO = 1 mA to 40 mA
0
C to 125
C
2.45
2.75
V
IO = 1 mA to 70 mA
0
C to 125
C
2.45
2.75
Input voltage regulation
VI = 4.75 V to 20 V
25
C
20
100
mV
Input voltage regulation
VI = 5 V to 20 V
25
C
16
75
mV
Ripple rejection
VI = 6 V to 20 V,
f = 120 Hz
25
C
43
51
dB
Output voltage regulation
IO = 1 mA to 100 mA
25
C
12
50
mV
Output voltage regulation
IO = 1 mA to 40 mA
25
C
6
25
mV
Output noise voltage
f = 10 Hz to 100 kHz
25
C
30
V
Dropout voltage
25
C
1.7
V
Bias current
25
C
3.6
6
mA
Bias current
125
C
5.5
mA
Bias current change
VI = 5 V to 20 V
0
C to 125
C
2.5
mA
Bias current change
IO = 1 mA to 40 mA
0
C to 125
C
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
electrical characteristics at specified virtual junction temperature, V
I
= 10 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L05C
A78L05AC
A78L05AI
UNIT
J
MIN
TYP
MAX
MIN
TYP
MAX
V
7 V to 20 V
I
1 mA to 40 mA
25
C
4.6
5
5.4
4.8
5
5.2
Output voltage
VI = 7 V to 20 V,
IO = 1 mA to 40 mA
Full range
4.5
5.5
4.75
5.25
V
IO = 1 mA to 70 mA
Full range
4.5
5.5
4.75
5.25
Input
VI = 7 V to 20 V
25
C
32
200
32
150
mV
voltage regulation
VI = 8 V to 20 V
25
C
26
150
26
100
mV
Ripple rejection
VI = 8 V to 18 V,
f = 120 Hz
25
C
40
49
41
49
dB
Output
IO = 1 mA to 100 mA
25
C
15
60
15
60
mV
voltage regulation
IO = 1 mA to 40 mA
25
C
8
30
8
30
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
42
42
V
Dropout voltage
25
C
1.7
1.7
V
Bias current
25
C
3.8
6
3.8
6
mA
Bias current
125
C
5.5
5.5
mA
Bias
VI = 8 V to 20 V
Full range
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
Full range
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output. Full range for the
A78L05AC is TJ = 0
C to 125
C
and full range for the
A78L05AI is TJ = 40
C to 125
C.
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
I
= 12 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L06C
A78L06AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
V
8 5 V to 20 V
I
1 mA to 40 mA
25
C
5.7
6.2
6.7
5.95
6.2
6.45
Output voltage
VI = 8.5 V to 20 V,
IO = 1 mA to 40 mA
0
C to 125
C
5.6
6.8
5.9
6.5
V
IO = 1 mA to 70 mA
0
C to 125
C
5.6
6.8
5.9
6.5
Input
VI = 8.5 V to 20 V
25
C
35
200
35
175
mV
voltage regulation
VI = 9 V to 20 V
25
C
29
150
29
125
mV
Ripple rejection
VI = 10 V to 20 V,
f = 120 Hz
25
C
39
48
40
48
dB
Output
IO = 1 mA to 100 mA
25
C
16
80
16
80
mV
voltage regulation
IO = 1 mA to 40 mA
25
C
9
40
9
40
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
46
46
V
Dropout voltage
25
C
1.7
1.7
V
Bias current
25
C
3.9
6
3.9
6
mA
Bias current
125
C
5.5
5.5
mA
Bias
VI = 9 V to 20 V
0
C to 125
C
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
0
C to 125
C
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
electrical characteristics at specified virtual junction temperature, V
I
= 14 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L08C
A78L08AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
V
10 5 V to 23 V
I
1 mA to 40 mA
25
C
7.36
8
8.64
7.7
8
8.3
Output voltage
VI = 10.5 V to 23 V, IO = 1 mA to 40 mA
0
C to 125
C
7.2
8.8
7.6
8.4
V
IO = 1 mA to 70 mA
0
C to 125
C
7.2
8.8
7.6
8.4
Input voltage
VI = 10.5 V to 23 V
25
C
42
200
42
175
mV
g
regulation
VI = 11 V to 23 V
25
C
36
150
36
125
mV
Ripple rejection
VI = 13 V to 23 V,
f = 120 Hz
25
C
36
46
37
46
dB
Output voltage
IO = 1 mA to 100 mA
25
C
18
80
18
80
mV
g
regulation
IO = 1 mA to 40 mA
25
C
10
40
10
40
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
54
54
V
Dropout voltage
25
C
1.7
1.7
V
Bias current
25
C
4
6
4
6
mA
Bias current
125
C
5.5
5.5
mA
Bias
VI = 5 V to 20 V
0
C to 125
C
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
0
C to 125
C
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
I
= 16 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L09C
A78L09AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
V
12 V to 24 V
I
1 mA to 40 mA
25
C
8.3
9
9.7
8.6
9
9.4
Output voltage
VI = 12 V to 24 V, IO = 1 mA to 40 mA
0
C to 125
C
8.1
9.9
8.55
9.45
V
IO = 1 mA to 70 mA
0
C to 125
C
8.1
9.9
8.55
9.45
Input
VI = 12 V to 24 V
25
C
45
225
45
175
mV
voltage regulation
VI = 13 V to 24 V
25
C
40
175
40
125
mV
Ripple rejection
VI = 15 V to 25 V, f = 120 Hz
25
C
36
45
38
45
dB
Output
IO = 1 mA to 100 mA
25
C
19
90
19
90
mV
voltage regulation
IO = 1 mA to 40 mA
25
C
11
40
11
40
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
58
58
V
Dropout voltage
25
C
1.7
1.7
V
Bias current
25
C
4.1
6
4.1
6
mA
Bias current
125
C
5.5
5.5
mA
Bias
VI = 13 V to 24 V
0
C to 125
C
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
0
C to 125
C
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
electrical characteristics at specified virtual junction temperature, V
I
= 14 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A78L10AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
UNIT
V
13 V to 25 V
I
1 mA to 40 mA
25
C
9.6
10
10.4
Output voltage
VI = 13 V to 25 V,
IO = 1 mA to 40 mA
0
C to 125
C
9.5
10.5
V
IO = 1 mA to 70 mA
0
C to 125
C
9.5
10.5
Input voltage regulation
VI = 13 V to 25 V
25
C
51
175
mV
Input voltage regulation
VI = 14 V to 25 V
25
C
42
125
mV
Ripple rejection
VI = 15 V to 25 V,
f = 120 Hz
25
C
37
44
dB
Output voltage regulation
IO = 1 mA to 100 mA
25
C
20
90
mV
Output voltage regulation
IO = 1 mA to 40 mA
25
C
11
40
mV
Output noise voltage
f = 10 Hz to 100 kHz
25
C
62
V
Dropout voltage
25
C
1.7
V
Bias current
25
C
4.2
6
mA
Bias current
125
C
5.5
mA
Bias current change
VI = 14 V to 25 V
0
C to 125
C
1.5
mA
Bias current change
IO = 1 mA to 40 mA
0
C to 125
C
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at specified virtual junction temperature, V
I
= 19 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L12C
A78L12AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
V
14 V to 27 V
I
1 mA to 40 mA
25
C
11.1
12
12.9
11.5
12
12.5
Output voltage
VI = 14 V to 27 V, IO = 1 mA to 40 mA
0
C to 125
C
10.8
13.2
11.4
12.6
V
IO = 1 mA to 70 mA
0
C to 125
C
10.8
13.2
11.4
12.6
Input
VI = 14.5 V to 27 V
25
C
55
250
55
250
mV
voltage regulation
VI = 16 V to 27 V
25
C
49
200
49
200
mV
Ripple rejection
VI = 15 V to 25 V, f = 120 Hz
25
C
36
42
37
42
dB
Output
IO = 1 mA to 100 mA
25
C
22
100
22
100
mV
voltage regulation
IO = 1 mA to 40 mA
25
C
13
50
13
50
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
70
70
V
Dropout voltage
25
C
1.7
1.7
V
Bias current
25
C
4.3
6.5
4.3
6.5
mA
Bias current
125
C
6
6
mA
Bias
VI = 16 V to 27 V
0
C to 125
C
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
0
C to 125
C
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
electrical characteristics at specified virtual junction temperature, V
I
= 23 V, I
O
= 40 mA (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
TJ
A78L15C
A78L15AC
UNIT
PARAMETER
TEST CONDITIONS
TJ
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
V
17 5 V to 30 V
I
1 mA to 40 mA
25
C
13.8
15
16.2
14.4
15
15.6
Output
voltage
VI = 17.5 V to 30 V,
IO = 1 mA to 40 mA
0
C to 125
C
13.5
16.5
14.25
15.75
V
voltage
IO = 1 mA to 70 mA
0
C to 125
C
13.5
16.5
14.25
15.75
Input
voltage
VI = 17.5 V to 30 V
25
C
65
300
65
300
mV
voltage
regulation
VI = 20 V to 30 V
25
C
58
250
58
250
mV
Ripple
rejection
VI = 18.5 V to 28.5 V, f = 120 Hz
25
C
33
39
34
39
dB
Output
voltage
IO = 1 mA to 100 mA
25
C
25
150
25
150
mV
voltage
regulation
IO = 1 mA to 40 mA
25
C
15
75
15
75
mV
Output
noise voltage
f = 10 Hz to 100 kHz
25
C
82
82
V
Dropout
voltage
25
C
1.7
1.7
V
Bias current
25
C
4.6
6.5
4.6
6.5
mA
Bias current
125
C
6
6
mA
Bias
VI = 10 V to 30 V
0
C to 125
C
1.5
1.5
mA
current change
IO = 1 mA to 40 mA
0
C to 125
C
0.2
0.1
mA
Pulse-testing techniques maintain TJ as close to TA as possible. Thermal effects must be taken into account separately. All characteristics are
measured with a 0.33-
F capacitor across the input and a 0.1-
F capacitor across the output.
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
VO
VI
0.1
F
0.33
F
A78Lxx
Figure 1. Fixed-Output Regulator
OUT
IN
G
VO
COM
+
VI
IL
A78Lxx
Figure 2. Positive Regulator in Negative Configuration (V
I
Must Float)
R1
0.33
F
Input
Output
A78Lxx
0.1
F
IO
R2
Figure 3. Adjustable-Output Regulator
VO(Reg)
R1
Input
IO
IO = (VO/R1) + IO Bias Current
0.33
F
A78Lxx
Output
Figure 4. Current Regulator
A78L00 SERIES
POSITIVE-VOLTAGE REGULATORS
SLVS010P JANUARY 1976 REVISED JUNE 2002
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
A78L15
0.1
F
1N4001
0.1
F
1N4001
0.33
F
0.33
F
1N4001
1N4001
VO = 15 V
VO = 15 V
20-V Input
20-V Input
A79L15
Figure 5. Regulated Dual Supply
operation with a load common to a voltage of opposite polarity
In many cases, a regulator powers a load that is not connected to ground, but instead, is connected to a voltage
source of opposite polarity (e.g., operational amplifiers, level-shifting circuits, etc.). In these cases, a clamp
diode should be connected to the regulator output as shown in Figure 6. This protects the regulator from output
polarity reversals during startup and short-circuit operation.
A78Lxx
VO
VI
VO
1N4001
or
Equivalent
Figure 6. Output Polarity-Reversal-Protection Circuit
reverse-bias protection
Occasionally, the input voltage to the regulator can collapse faster than the output voltage. This can occur, for
example, when the input supply is crowbarred during an output overvoltage condition. If the output voltage is
greater than approximately 7 V, the emitter-base junction of the series-pass element (internal or external) could
break down and be damaged. To prevent this, a diode shunt can be employed as shown in Figure 7.
A78Lxx
VO
VI
Figure 7. Reverse-Bias-Protection Circuit
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