STMicroelectronics L7812ABD2T Precision 1a regulator Datasheet

L7800AB/AC
SERIES

PRECISION 1A REGULATORS
■
■
■
■
■
■
OUTPUT CURRENT IN EXCESS OF 1 A
OUTPUT VOLTAGES OF 5; 6; 8; 9; 12; 15; 18;
20; 24V
THERMAL OVERLOAD PROTECTION
OUTPUT TRANSITION SOA PROTECTION
2% OUTPUT VOLTAGE TOLERANCE
GUARANTEED IN EXTENDED
TEMPERATURE RANGE
DESCRIPTION
The L7800A series of three-terminal positive
regulators is available in TO-220 and D2PAK
packages and several fixed output voltages,
making it useful in a wide range of
applications.These regulators can provide local
on-card regulation, eliminating the distribution
problems associated with single point regulation.
Each type employs internal current limiting,
thermal shut-down and safe area protection,
making it essentially indestructible. If adequate
heat sinking is provided, they can deliver over 1A
output current. Although designed primarily as
fixed voltage regulators, these devices can be
used with external components to obtain
adjustable voltages and currents.
D2PAK
TO-220
BLOCK DIAGRAM
November 1999
1/17
L7800AB/AC
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
35
40
V
V
Vi
DC Input Voltage (for VO = 5 to 18V)
(for V O = 20, 24V)
Io
Output Current
Internally limited
P tot
Power Dissipation
Internally limited
T op
Operating Junction Temperature Range (for L7800AC)
(for L7800AB)
0 to 150
-40 to 125
o
T st g
Storage Temperature Range
- 65 to 150
o
o
C
C
C
THERMAL DATA
Symbol
2
Parameter
R thj- ca se Thermal Resistance Junction-case
R thj- amb Thermal Resistance Junction-ambient
D PAK
Max
Max
3
62.5
TO-220
3
50
Unit
o
o
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
D2PAK
TO-220
Type
L7805AB
L7805AC
L7806AB
L7806AC
L7808AB
L7808AC
L7809AB
L7809AC
L7812AB
L7812AC
L7815AB
L7815AC
L7818AB
L7818AC
L7820AB
L7820AC
L7824AB
L7824AC
TO-220
L7805ABV
L7805ACV
L7806ABV
L7806ACV
L7808ABV
L7808ACV
L7809ABV
L7809ACV
L7812ABV
L7812ACV
L7815ABV
L7815ACV
L7818ABV
L7818ACV
L7820ABV
L7820ACV
L7824ABV
L7824ACV
(*) AVAILABLE IN TAPE AND REEL WITH ”-TR” SUFFIX
2/17
D 2PAK (*)
L7805ABD2T
L7805ACD2T
L7806ABD2T
L7806ACD2T
L7808ABD2T
L7808ACD2T
L7809ABD2T
L7809ACD2T
L7812ABD2T
L7812ACD2T
L7815ABD2T
L7815ACD2T
Output Voltage
5V
5V
6V
6V
8V
8V
9V
9V
12V
12V
15V
15V
18V
18V
24V
24V
C/W
C/W
L7800AB/AC
APPLICATION CIRCUIT
SCHEMATIC DIAGRAM
3/17
L7800AB/AC
TEST CIRCUITS
Figure 1 : DC Parameter
Figure 3 : Ripple Rejection.
4/17
Figure 2 : Load Regulation.
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7805A (Vi = 10V, Io = 1 A, Tj = 0 to 125 oC (L7805AC),
Tj = -40 to 125 oC (L7805AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 7.5 to 20 V
∆V o *
Line Regulation
Vi = 7.5 to 25 V
Vi = 8 to 12 V
Vi = 8 to 12 V
Vi = 7.3 to 20 V
∆V o *
Id
∆I d
SVR
Vd
Po ≤ 15 W
Io = 500 mA
Tj = 25 oC
Tj = 25 oC
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
Quiescent Current
Tj = 25 C
Quiescent Current Change
Vi = 8 to 25 V
Io = 500 mA
Tj = 25 oC
Vi = 7.5 to 20 V
Io = 5 mA to 1 A
Supply Voltage Rejection
Vi = 8 to 18 V
Io = 500 mA
Dropout Voltage
Io = 1 A
o
f = 120 Hz
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
Min.
Typ.
Max.
Unit
4.9
5
5.1
V
4.8
5
5.2
V
7
10
2
7
50
5
25
50
mV
mV
mV
mV
25
30
8
100
100
50
mV
mV
mV
4.3
6
6
mA
0.8
0.8
0.5
mA
mA
mA
68
dB
2
V
10
µV/V o
17
mΩ
0.2
A
2.2
A
-1.1
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
5/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7806A (Vi = 11V, Io = 1 A, Tj = 0 to 125 oC (L7806AC),
Tj = -40 to 125 oC (L7806AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 8.6 to 21 V
∆V o *
Line Regulation
Vi = 8.6 to 25 V
Vi = 9 to 13 V
Vi = 9 to 13 V
Vi = 8.3 to 21 V
∆V o *
Id
∆I d
SVR
Vd
Po ≤ 15 W
Io = 500 mA
Tj = 25 oC
Tj = 25 oC
Typ.
Max.
Unit
5.88
6
6.12
V
5.76
6
6.24
V
9
11
3
9
60
60
30
60
mV
mV
mV
mV
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.3
6
6
mA
Quiescent Current Change
Vi = 9 to 25 V
Io = 500 mA
Tj = 25 oC
Vi = 8.6 to 21 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 9 to 19 V
Io = 500 mA
Dropout Voltage
Io = 1 A
f = 120 Hz
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Min.
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
65
dB
2
V
10
µV/V o
17
mΩ
0.2
A
2.2
A
-0.8
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
6/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7808A (Vi = 14V, Io = 1 A, Tj = 0 to 125 oC (L7808AC),
Tj = -40 to 125 oC (L7808AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 10.6 to 23 V
Po ≤ 15 W
∆V o *
Line Regulation
Vi = 10.6 to 25 V
Vi = 11 to 17 V
Vi = 11 to 17 V
Vi = 10.4 to 23 V
Io = 500 mA
∆V o *
Id
∆I d
SVR
Vd
Tj = 25 oC
Tj = 25 oC
Typ.
Max.
Unit
7.84
8
8.16
V
7.7
8
8.3
V
12
15
5
12
80
80
40
80
mV
mV
mV
mV
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.3
6
6
mA
Quiescent Current Change
Vi = 11 to 25 V
Io = 500 mA
Tj = 25 oC
Vi = 10.6 to 23 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 11.5 to 21.5 V
Io = 500 mA
Dropout Voltage
Io = 1 A
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
f = 120 Hz
Tj = 25 oC
eN
Is c
Min.
o
Tj = 25 C
o
Tamb = 25 C
62
dB
2
V
10
µV/V o
18
mΩ
0.2
A
2.2
A
-0.8
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
7/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7809A (Vi = 15V, Io = 1 A, Tj = 0 to 125 oC (L7809AC),
Tj = -40 to 125 oC (L7809AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 10.6 to 23 V
Po ≤ 15 W
∆V o *
Line Regulation
Vi = 10.6 to 25 V
Vi = 11 to 17 V
Vi = 11 to 17 V
Vi = 10.4 to 23 V
Io = 500 mA
∆V o *
Id
∆I d
SVR
Vd
Tj = 25 oC
Tj = 25 oC
Typ.
Max.
Unit
8.82
9
9.18
V
8.65
9
9.35
V
12
15
5
12
90
90
45
90
mV
mV
mV
mV
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.3
6
6
mA
Quiescent Current Change
Vi = 11 to 25 V
Io = 500 mA
Tj = 25 oC
Vi = 10.6 to 23 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 11.5 to 21.5 V
Io = 500 mA
Dropout Voltage
Io = 1 A
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
f = 120 Hz
Tj = 25 oC
eN
Is c
Min.
o
Tj = 25 C
o
Tamb = 25 C
61
dB
2
V
10
µV/V o
18
mΩ
0.2
A
2.2
A
-0.8
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
8/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7812A (Vi = 19V, Io = 1 A, Tj = 0 to 125 oC (L7812AC),
Tj = -40 to 125 oC (L7812AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 14.8 to 27 V
Po ≤ 15 W
∆V o *
Line Regulation
Vi = 14.8 to 30 V
Vi = 16 to 22 V
Vi = 16 to 22 V
Vi = 14.5 to 27 V
Io = 500 mA
∆V o *
Id
∆I d
SVR
Vd
Tj = 25 oC
Tj = 25 oC
Typ.
Max.
Unit
11.75
12
12.25
V
11.5
12
12.5
V
13
16
6
13
120
120
60
120
mV
mV
mV
mV
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.4
6
6
mA
Quiescent Current Change
Vi = 15 to 30 V
Io = 500 mA
Tj = 25 oC
Vi = 14.8 to 27 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 15 to 25 V
Io = 500 mA
Dropout Voltage
Io = 1 A
f = 120 Hz
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Min.
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
60
dB
2
V
10
µV/V o
18
mΩ
0.2
A
2.2
A
-1
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
9/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7815A (Vi = 23V, Io = 1 A, Tj = 0 to 125 oC (L7815AC),
Tj = -40 to 125 oC (L7815AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 17.9 to 30 V
Po ≤ 15 W
∆V o *
Line Regulation
Vi = 17.9 to 30 V
Vi = 20 to 26 V
Vi = 20 to 26 V
Vi = 17.5 to 30 V
Io = 500 mA
∆V o *
Id
∆I d
SVR
Vd
Tj = 25 oC
Tj = 25 oC
Typ.
Max.
Unit
14.7
15
15.3
V
14.4
15
15.6
V
13
16
6
13
150
150
75
150
mV
mV
mV
mV
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.4
6
6
mA
Quiescent Current Change
Vi = 17.5 to 30 V
Vi = 17.5 to 30 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 18.5 to 28.5 V
Io = 500 mA
Dropout Voltage
Io = 1 A
Io = 500 mA
Tj = 25 oC
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
f = 120 Hz
Tj = 25 oC
eN
Is c
Min.
o
Tj = 25 C
o
Tamb = 25 C
58
dB
2
V
10
µV/V o
19
mΩ
0.2
A
2.2
A
-1
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
10/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7818A (Vi = 27V, Io = 1 A, Tj = 0 to 125 oC (L7818AC),
Tj = -40 to 125 oC (L7818AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Min.
Typ.
Max.
Unit
17.64
18
18.36
V
17.3
18
18.7
V
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 21 to 33 V
∆V o *
Line Regulation
Vi = 21 to 33 V Io = 500 mA
Vi = 24 to 30 V
Vi = 24 to 30 V
Tj = 25 oC
Vi = 20.6 to 33 V Tj = 25 oC
25
28
10
5
180
180
90
180
mV
mV
mV
mV
∆V o *
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.5
6
6
mA
Quiescent Current Change
Vi = 21 to 33 V
Vi = 21 to 33 V
Io = 5 mA to 1 A
Io = 500 mA
Tj = 25 oC
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 22 to 32 V
Io = 500 mA
f = 120 Hz
Dropout Voltage
Io = 1 A
Id
∆I d
SVR
Vd
Po ≤ 15 W
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
57
dB
2
V
10
µV/V o
19
mΩ
0.2
A
2.2
A
-1
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
11/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7820A (Vi = 28V, Io = 1 A, Tj = 0 to 125 oC (L7820AC),
Tj = -40 to 125 oC (L7820AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 23 to 35 V
∆V o *
Line Regulation
Vi = 23 to 35 V
Vi = 26 to 32 V
Vi = 26 to 32 V
Vi = 23 to 32 V
∆V o *
Id
∆I d
SVR
Vd
Po ≤ 15 W
Typ.
Max.
Unit
19.6
20
20.4
V
19.2
20
20.8
V
200
200
100
200
mV
mV
mV
mV
Io = 500 mA
Tj = 25 oC
Tj = 25 oC
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.5
6
6
mA
Quiescent Current Change
Vi = 23 to 35 V
Vi = 23 to 35 V
Io = 5 mA to 1 A
Io = 500 mA
Tj = 25 oC
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 24 to 35 V
Io = 500 mA
f = 120 Hz
Dropout Voltage
Io = 1 A
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Min.
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
56
dB
2
V
10
µV/V o
20
mΩ
0.2
A
2.2
A
-1
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
12/17
L7800AB/AC
ELECTRICAL CHARACTERISTICS FOR L7824A (Vi = 33V, Io = 1 A, Tj = 0 to 125 oC (L7824AC),
Tj = -40 to 125 oC (L7824AB) unless otherwise specified)
Symbol
Parameter
Test Conditions
o
Min.
Typ.
Max.
Unit
23.5
24
24.5
V
23
24
25
V
Vo
Output Voltage
Tj = 25 C
Vo
Output Voltage
Io = 5 mA to 1 A
Vi = 27.3 to 38 V
∆V o *
Line Regulation
Vi = 27 to 38 V Io = 500 mA
Vi = 30 to 36 V
Vi = 30 to 36 V
Tj = 25 oC
Vi = 26.7 to 38 V Tj = 25 oC
31
35
14
31
240
240
120
240
mV
mV
mV
mV
∆V o *
Load Regulation
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
25
30
10
100
100
50
mV
mV
mV
Quiescent Current
Tj = 25 oC
4.6
6
6
mA
Quiescent Current Change
Vi = 27.3 to 38 V
Vi = 27.3 to 38 V
Io = 5 mA to 1 A
0.8
0.8
0.5
mA
mA
mA
Supply Voltage Rejection
Vi = 28 to 38 V
Io = 500 mA
Dropout Voltage
Io = 1 A
Id
∆I d
SVR
Vd
Po ≤ 15 W
Io = 500 mA
Tj = 25 oC
f = 120 Hz
Tj = 25 oC
eN
Output Noise Voltage
B = 10Hz to 100KHz
Ro
Output Resistance
f = 1KHz
Is c
Short Circuit Current
I scp
Short Circuit Peack Current
∆ Vo
Output Voltage Drift
Vi = 35 V
o
Tj = 25 C
o
Tj = 25 C
o
Tamb = 25 C
54
dB
2
V
10
µV/V o
20
mΩ
0.2
A
2.2
A
-1.5
mV/ oC
∆T
* Load and line regulation are specified at constant junction temperature. Changes in Vo due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
13/17
L7800AB/AC
APPLICATIONS INFORMATION
DESIGN CONSIDERATIONS
The L7800A Series of fixed voltage regulators are
designed with Thermal Overload Protection that
shuts down the circuit when subjected to an
excessive power overload condition, Internal
Short-circuit Protection that limits the maximum
current the circuit will pass, and Output Transistor
Safe-Area Compensation that reduces the output
short-circuit current as the voltage across the
pass transistor is increased.
In many low current applications, compensation
capacitors are not required. However, it is
recommended that the regulator input be
bypassed with a capacitor if the regulator is
connected to the power supply filter with long
wire lengths, or if the output load capacitance is
large. An input bypass capacitor should be
selected to provide good high-frequency
characteristics to insure stable operation under all
load conditions. A 0.33µF or larger tantalum,
mylar, or other capacitor having low internal
impedance at high frequencies should be chosen.
The bypass capacitor should be mounted with the
shortest possible leads directly across the
regulators input terminals. Normally good
construction techniques should be used to
minimize ground loops and lead resistance drops
since the regulator has no external sense lead.
Figure 4 : Current Regulator.
Figure 5 : Adjustable Output Regulator.
VO, 7.0V to 20V
Vi – VO ≥ 2.0V
IO =
V XX
+Id
R1
The addition of an operational amplifier allows
adjustment to higher or intermediate values while
retaining regulation characteristics. The minimum
voltage obtainable with this arrangement is 2.0V
greater than the regulator voltage.
Figure 6 : Current Boost Regulator.
R1 =
V BEQ1
I REQ −
IO = I
14/17
REG
I Q1
β Q1
V BEQ1
+ Q 1 ( I REG −
R1
)
Figure 7 : Short-circuit Protection.
The circuit of figure 6 can be modified to provide
supply protection against short circuit by adding a
short-circuit sense resistor, Rsc, and an additional
PNP transistor. The current sensing PNP must be
able to handle the short-circuit current of the
three-terminal
regulator.
Therefore,
a
four-ampere plastic power transistor is specified.
L7800AB/AC
TO-220 MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
MIN.
TYP.
MAX.
A
4.40
4.60
0.173
0.181
C
1.23
1.32
0.048
0.051
D
2.40
2.72
0.094
D1
0.107
1.27
0.050
E
0.49
0.70
0.019
0.027
F
0.61
0.88
0.024
0.034
F1
1.14
1.70
0.044
0.067
F2
1.14
1.70
0.044
0.067
G
4.95
5.15
0.194
0.203
G1
2.4
2.7
0.094
0.106
H2
10.0
10.40
0.393
0.409
14.0
0.511
L2
16.4
L4
0.645
13.0
0.551
2.65
2.95
0.104
0.116
L6
15.25
15.75
0.600
0.620
L7
6.2
6.6
0.244
0.260
L9
3.5
3.93
0.137
0.154
DIA.
3.75
3.85
0.147
0.151
D1
C
D
A
E
L5
H2
G
G1
F1
L2
F2
F
Dia.
L5
L9
L7
L6
L4
P011C
15/17
L7800AB/AC
TO-263 (D2PAK) MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
MIN.
TYP.
MAX.
A
4.4
4.6
0.173
0.181
A1
2.49
2.69
0.098
0.106
B
0.7
0.93
0.027
0.036
B2
1.14
1.7
0.044
0.067
C
0.45
0.6
0.017
0.023
C2
1.23
1.36
0.048
0.053
D
8.95
9.35
0.352
0.368
E
10
10.4
0.393
0.409
G
4.88
5.28
0.192
0.208
L
15
15.85
0.590
0.624
L2
1.27
1.4
0.050
0.055
L3
1.4
1.75
0.055
0.068
D
C2
A2
A
C
DETAIL”A”
DETAIL”A”
A1
B2
E
B
G
L2
L
L3
P011P6/F
16/17
L7800AB/AC
Information furnished is believed to be accurate and reliable. However, STMicroelectronic s assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
 1999 STMicroelectronics – Printed in Italy – All Rights Reserved
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.
17/17
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