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Электронный компонент: L7912ACV

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L7900AC
SERIES
2% NEGATIVE VOLTAGE REGULATORS
November 1999
s
OUTPUT CURRENT UP TO 1.5 A
s
OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -12;
-15; -18; -20; -22; -24V
s
THERMAL OVERLOAD PROTECTION
s
SHORT CIRCUIT PROTECTION
s
OUTPUT TRANSITION SOA PROTECTION
DESCRIPTION
The L7900AC series of three-terminal negative
regulators is available in TO-220 and D
2
PAK
packages and several fixed output voltages.
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 L7800A 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.
TO-220
1
3
D
2
PAK
SCHEMATIC DIAGRAM
1/11
CONNECTION DIAGRAM AND ORDERING NUMBERS (top view)
TO-220
D
2
PAK
THERMAL DATA
Symbol
Parameter
D
2
PAK
TO-220
Unit
R
thj- ca se
R
thj- amb
Thermal Resistance Junction-case
Max
Thermal Resistance Junction-ambient
Max
3
62.5
3
50
o
C/W
o
C/W
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
i
DC Input Voltage (for V
O
= -5 to -18V)
(for V
O
= -20, -24V)
-35
-40
V
V
I
o
Output Current
I nternally limited
P
tot
Power Dissipation
I nternally limited
T
op
Operating Junction Temperature Range
0 to 125
o
C
T
st g
Storage Temperature Range
- 65 to 150
o
C
Type
TO-220
D
2
PAK (*)
Output Voltage
L7905AC
L7952AC
L7906AC
L7908AC
L7912AC
L7915AC
L7918AC
L7920AC
L7922AC
L7924AC
L7905ACV
L7952ACV
L7906ACV
L7908ACV
L7912ACV
L7915ACV
L7918ACV
L7920ACV
L7922ACV
L7924ACV
L7905ACD2T
L7952ACD2T
L7906ACD2T
L7908ACD2T
L7912ACD2T
L7915ACD2T
L7918ACD2T
L7920ACD2T
L7922ACD2T
L7924ACD2T
-5V
-5.2V
-6V
-8V
-12V
-15V
-18V
-20V
-22V
-24V
(*) AVAILABLE IN TAPE AND REEL WITH "-TR" SUFFIX
APPLICATION CIRCUIT
L7900AC
2/11
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7905A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -10V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-4.9
-5
-5.1
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= 8 to 20 V
-4.8
-5
-5.2
V
V
o
*
Line Regulation
V
i
= -7 to -25 V
T
j
= 25
o
C
V
i
= -8 to -12 V
T
j
= 25
o
C
100
50
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
100
50
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -8 to -25 V
1.3
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 4
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
100
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.4
V
I
s c
Short Circuit Current
2.1
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7952A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -10V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-5.1
-5. 2
-5.3
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -9 to -21 V
-5
-5. 2
-5.4
V
V
o
*
Line Regulation
V
i
= -8 to -25 V
T
j
= 25
o
C
V
i
= -9 to -13 V
T
j
= 25
o
C
105
52
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
105
52
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -9 to -25 V
1.3
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 5
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
125
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.4
V
I
s c
Short Circuit Current
2.1
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.5
A
L7900AC
3/11
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7906A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -11V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-5. 88
-6
-6.12
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -9.5 to -21.5 V
-5. 76
-6
-6.24
V
V
o
*
Line Regulation
V
i
= -8.5 to -25 V
T
j
= 25
o
C
V
i
= -9 to -15 V
T
j
= 25
o
C
120
60
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
120
60
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -9.5 to -25 V
1.3
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 6
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
144
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.4
V
I
s c
Short Circuit Current
2
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7908A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -14V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-7. 84
-8
-8.16
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -11.5 to -23 V
-7. 68
-8
-8.32
V
V
o
*
Line Regulation
V
i
= -10.5 to -25 V
T
j
= 25
o
C
V
i
= -11 to -17 V
T
j
= 25
o
C
160
80
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
160
80
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -11.5 to -25 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 6
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
175
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.5
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.5
A
L7900AC
4/11
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7912A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -19V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-11. 75
-12
-12.25
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -15.5 to -27 V
-11.5
-12
-12.5
V
V
o
*
Line Regulation
V
i
= -14.5 to -30 V
T
j
= 25
o
C
V
i
= -16 to -22 V
T
j
= 25
o
C
240
120
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
240
120
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -15 to -25 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 8
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
200
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.5
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.5
A
ELECTRICAL CHARACTERISTICS FOR L7915A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -23V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-14.7
-15
-15.3
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -18.5 to -30 V
-14.4
-15
-15.6
V
V
o
*
Line Regulation
V
i
= -17.5 to -30 V
T
j
= 25
o
C
V
i
= -20 to -26 V
T
j
= 25
o
C
300
150
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
300
150
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -18.5 to -30 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-0. 9
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
250
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.3
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.3
A
L7900AC
5/11
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7918A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -27V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-17. 64
-18
-18.36
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -22 to -33 V
-17.3
-18
-18.7
V
V
o
*
Line Regulation
V
i
= -21 to -33 V
T
j
= 25
o
C
V
i
= -24 to -30 V
T
j
= 25
o
C
360
180
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
360
180
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -22 to -33 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-1
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
300
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.1
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7920A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -29V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-19.6
-20
-20.4
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -24 to -35 V
-19.2
-20
-20.8
V
V
o
*
Line Regulation
V
i
= -23 to -35 V
T
j
= 25
o
C
V
i
= -26 to -32 V
T
j
= 25
o
C
400
200
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
400
200
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -24 to -35 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-1. 1
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
350
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
0.9
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.2
A
L7900AC
6/11
* Load and line regulation are specified at constant junction temperature. Changes in V
o
due to heating effects must be taken into account
separately. Pulce testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS FOR L7922A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -31V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-21.5
-22
-22.4
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -26 to -37 V
-21.1
-22
-22.8
V
V
o
*
Line Regulation
V
i
= -25 to -37 V
T
j
= 25
o
C
V
i
= -28 to -34 V
T
j
= 25
o
C
440
220
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
440
220
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -26 to -37 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-1. 1
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
375
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.1
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.2
A
ELECTRICAL CHARACTERISTICS FOR L7924A (refer to the test circuits, T
j
= 0 to 125
o
C,
V
i
= -33V, I
o
= 500 mA, C
i
= 2.2
F, C
o
= 1
F unless otherwise specified)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
o
Output Voltage
T
j
= 25
o
C
-23.5
-24
-24.5
V
V
o
Output Voltage
I
o
= -5 mA to -1 A
P
o
15 W
V
i
= -27 to -38 V
-23
-24
-25
V
V
o
*
Line Regulation
V
i
= -27 to -38 V
T
j
= 25
o
C
V
i
= -30 to -36 V
T
j
= 25
o
C
480
240
mV
mV
V
o
*
Load Regulation
I
o
= 5 to 1500 mA
T
j
= 25
o
C
I
o
= 250 to 750 mA
T
j
= 25
o
C
480
240
mV
mV
I
d
Quiescent Current
T
j
= 25
o
C
3
mA
I
d
Quiescent Current Change
I
o
= 5 to 1000 mA
0.5
mA
I
d
Quiescent Current Change
V
i
= -27 to -38 V
1
mA
V
o
T
Output Voltage Drift
I
o
= 5 mA
-1
mV/
o
C
e
N
Output Noise Voltage
B = 10Hz to 100KHz T
j
= 25
o
C
400
V
SVR
Supply Voltage Rejection
V
i
= 10 V
f = 120 Hz
54
60
dB
V
d
Dropout Voltage
I
o
= 1 A
T
j
= 25
o
C
V
O
= 100 mV
1.1
V
I
s c
Short Circuit Current
1.1
A
I
scp
Short Circuit Peak Current
T
j
= 25
o
C
2.2
A
L7900AC
7/11
Figure 1 : Fixed Output Regulator.
Figure 2 : Split Power Supply (
15V/1A).
Notes :
1. To specify an output voltage, substitute voltage value for "XX".
2. Required for stability. For value given, capacitor must be solid
tantalum. If aluminium electrolitics are used, at least ten times
value should be selected. C
1
is required if regulator is located an
appreciable distance from power supply filter.
3. To improve transient response. If large capacitors are used, a
high current diode from input to output (1N4001 or similar) should
be introduced to protect the device from momentary input short
circuit.
Against potential latch-up problems.
APPLICATION INFORMATION
Figure 3 : Circuit for Increasing Output Voltage.
Figure 4 : High Current Negative Regulator
( 5V/4A with 5A current limiting).
C3 Optional for improved transient response and ripple rejection.
Figure 5 : Typical ECL System Power Supply
( 5.2V/4A).
Optional dropping resistor to reduce the power dissipated in the
boost transistor.
V
O
=
V
XX
R
1
+
R
2
R
2
V
XX
R
2
>
3
I
d
L7900AC
8/11
DIM.
mm
inch
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
A
4.8
0.189
C
1.37
0.054
D
2.4
2.8
0.094
0.110
D1
1.2
1.35
0.047
0.053
E
0.35
0.55
0.014
0.022
F
0.61
0.94
0.024
0.037
F2
1.15
1.4
0.045
0.055
G
4.95
5.08
5.21
0.195
0.200
0.205
H2
10.4
0.409
H3
10.05
10.4
0.396
0.409
L2
16.2
0.638
L3
26.3
26.7
27.1
1.035
1.051
1.067
L5
2.6
3
0.102
0.118
L6
15.1
15.8
0.594
0.622
L7
6
6.6
0.236
0.260
Dia.
3.65
3.85
0.144
0.152
P011D
TO-220 MECHANICAL DATA
L7900AC
9/11
DIM.
mm
inch
MIN.
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
L2
L3
L
B2
B
G
E
A
C2
D
C
A1
DETAIL "A"
DETAIL "A"
A2
P011P6/F
TO-263 (D
2
PAK) MECHANICAL DATA
L7900AC
10/11
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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 STMi croelectronics. Specification mentioned in this publication are
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are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
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.
L7900AC
11/11