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PDF 79XX Data sheet ( Hoja de datos )
| Número de pieza | 79XX | |
| Descripción | NEGATIVE VOLTAGE REGULATORS | |
| Fabricantes | STMicroelectronics | |
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L7900
SERIES
NEGATIVE VOLTAGE REGULATORS
s OUTPUT CURRENT UP TO 1.5A
s OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -9;
-12; -15; -18; -20; -22; -24V
s THERMAL OVERLOAD PROTECTION
s SHORT CIRCUIT PROTECTION
s OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7900 series of three-terminal negative
regulators is available in TO-220, TO-220FP,
TO-3 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;
furthermore, having the same voltage option as
the L7800 positive standard series, they are
particularly suited for split power supplies. In
addition, the -5.2V is also available for ECL
system. If adequate heat sinking is provided, they
can deliver over 1.5A output current.
Although designed primarily as fixed voltage
regulators, these devices can be used with
external components to obtain adjustable voltages
and currents.
SCHEMATIC DIAGRAM
TO-220
D2PAK
TO-220FP
TO-3
February 2003
1/16
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L7900 SERIES
ELECTRICAL CHARACTERISTICS OF L7908C (refer to the test circuits, TJ = 0 to 125°C, VI = -14V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VO Output Voltage
TJ = 25°C
-7.7 -8 -8.3 V
VO Output Voltage
IO = -5 mA to -1 A PO ≤ 15 W
VI = -11.5 to -23 V
-7.6 -8 -8.4 V
∆VO(*) Line Regulation
VI = -10.5 to -25 V
TJ = 25°C
160 mV
VI = -11 to -17 V
TJ = 25°C
80
∆VO(*) Load Regulation
IO = 5 mA to 1.5 A
TJ = 25°C
160 mV
IO = 250 to 750 mA
TJ = 25°C
80
Id Quiescent Current
TJ = 25°C
3 mA
∆Id Quiescent Current Change IO = 5 mA to 1 A
0.5 mA
VI = -11.5 to -25 V
1
∆VO/∆T Output Voltage Drift
IO = 5 mA
-0.6 mV/°C
eN Output Noise Voltage
B = 10Hz to 100KHz
TJ = 25°C
175 µV
SVR Supply Voltage Rejection ∆VI = 10 V f = 120Hz
54 60
dB
Vd Dropout Voltage
IO = 1 A
TJ = 25°C ∆VO = 100 mV
1.1
V
Isc Short Circuit Current
1.5 A
(*) 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.
ELECTRICAL CHARACTERISTICS OF L7912C (refer to the test circuits, TJ = 0 to 125°C, VI = -19V,
IO = 500 mA, CI = 2.2 µF, CO = 1 µF unless otherwise specified).
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VO Output Voltage
TJ = 25°C
-11.5 -12 -12.5 V
VO Output Voltage
IO = -5 mA to -1 A PO ≤ 15 W
VI = -15.5 to -27 V
-11.4 -12 -12.6 V
∆VO(*) Line Regulation
VI = -14.5 to -30 V
TJ = 25°C
240 mV
VI = -16 to -22 V
TJ = 25°C
120
∆VO(*) Load Regulation
IO = 5 mA to 1.5 A
TJ = 25°C
240 mV
IO = 250 to 750 mA
TJ = 25°C
120
Id Quiescent Current
TJ = 25°C
3 mA
∆Id Quiescent Current Change IO = 5 mA to 1 A
0.5 mA
VI = -15 to -30 V
1
∆VO/∆T Output Voltage Drift
IO = 5 mA
-0.8 mV/°C
eN Output Noise Voltage
B = 10Hz to 100KHz
TJ = 25°C
200 µV
SVR Supply Voltage Rejection ∆VI = 10 V f = 120Hz
54 60
dB
Vd Dropout Voltage
IO = 1 A
TJ = 25°C ∆VO = 100 mV
1.1
V
Isc Short Circuit Current
1.5 A
(*) 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.
5/16
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L7900 SERIES
DIM.
A
B
C
D
E
G
N
P
R
U
V
MIN.
0.96
3.88
TO-3 MECHANICAL DATA
mm.
TYP
11.85
1.05
10.9
16.9
30.10
MAX.
1.10
1.70
8.7
20.0
26.2
4.09
39.5
MIN.
0.037
0.152
inch
TYP.
0.466
0.041
0.429
0.665
1.185
MAX.
0.043
0.066
0.342
0.787
1.031
0.161
1.555
P AD
GC
R
P003C/C
11/16
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| PDF Descargar | [ Datasheet 79XX.PDF ] | |
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