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L7818AC Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer L7818AC
Beschreibung PRECISION 1A REGULATORS
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 17 Seiten
L7818AC Datasheet, Funktion
L7800AB/AC
® SERIES
PRECISION 1A REGULATORS
s OUTPUT CURRENT IN EXCESS OF 1 A
s OUTPUT VOLTAGES OF 5; 6; 8; 9; 12; 15; 18;
20; 24V
s THERMAL OVERLOAD PROTECTION
s OUTPUT TRANSITION SOA PROTECTION
s 2% OUTPUT VOLTAGE TOLERANCE
s 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.
BLOCK DIAGRAM
D2PAK
TO-220
November 1999
1/17






L7818AC Datasheet, Funktion
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
Min. Typ. Max. Unit
Vo Output Voltage
Tj = 25 oC
5.88 6 6.12 V
Vo Output Voltage
Io = 5 mA to 1 A
Vi = 8.6 to 21 V
Po 15 W
5.76 6 6.24 V
Vo* Line Regulation
Vi = 8.6 to 25 V
Vi = 9 to 13 V
Vi = 9 to 13 V
Vi = 8.3 to 21 V
Io = 500 mA
Tj = 25 oC
Tj = 25 oC
9 60 mV
11 60 mV
3 30 mV
9 60 mV
Vo* Load Regulation
Id Quiescent Current
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
Tj = 25 oC
25 100 mV
30 100 mV
10 50 mV
4.3 6 mA
6
Id Quiescent Current Change
SVR Supply Voltage Rejection
Vd Dropout Voltage
eN Output Noise Voltage
Ro Output Resistance
Is c Short Circuit Current
Iscp Short Circuit Peack Current
Vo Output Voltage Drift
T
Vi = 9 to 25 V Io = 500 mA
Vi = 8.6 to 21 V Tj = 25 oC
Io = 5 mA to 1 A
Vi = 9 to 19 V f = 120 Hz
Io = 500 mA
Io = 1 A Tj = 25 oC
B = 10Hz to 100KHz Tj = 25 oC
f = 1KHz
Vi = 35 V Tamb = 25 oC
Tj = 25 oC
0.8 mA
0.8 mA
0.5 mA
65 dB
2V
10 µV/Vo
17 m
0.2 A
2.2 A
-0.8
m V/ oC
* 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

6 Page









L7818AC pdf, datenblatt
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
Min. Typ. Max. Unit
Vo Output Voltage
Tj = 25 oC
19.6 20 20.4
V
Vo Output Voltage
Io = 5 mA to 1 A
Vi = 23 to 35 V
Po 15 W
19.2 20 20.8
V
Vo* Line Regulation
Vi = 23 to 35 V
Vi = 26 to 32 V
Vi = 26 to 32 V
Vi = 23 to 32 V
Io = 500 mA
Tj = 25 oC
Tj = 25 oC
200 mV
200 mV
100 mV
200 mV
Vo* Load Regulation
Id Quiescent Current
Io = 5 mA to 1 A
Io = 5 mA to 1.5 A Tj = 25 oC
Io = 250 to 750 mA
Tj = 25 oC
25 100 mV
30 100 mV
10 50 mV
4.5 6 mA
6
Id Quiescent Current Change
SVR Supply Voltage Rejection
Vd Dropout Voltage
eN Output Noise Voltage
Ro Output Resistance
Is c Short Circuit Current
Iscp Short Circuit Peack Current
Vo Output Voltage Drift
T
Vi = 23 to 35 V Io = 500 mA
Vi = 23 to 35 V Tj = 25 oC
Io = 5 mA to 1 A
Vi = 24 to 35 V f = 120 Hz
Io = 500 mA
Io = 1 A Tj = 25 oC
B = 10Hz to 100KHz Tj = 25 oC
f = 1KHz
Vi = 35 V Tamb = 25 oC
Tj = 25 oC
0.8 mA
0.8 mA
0.5 mA
56 dB
2V
10 µV/Vo
20 m
0.2 A
2.2 A
-1 mV/oC
* 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

12 Page





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