L7900
SERIES
NEGATIVE VOLTAGE REGULATORS
s
s
OUTPUT CURRENT UP TO 1.5A
OUTPUT VOLTAGES OF -5; -5.2; -6; -8; -9;
-12; -15; -18; -20; -22; -24V
THERMAL OVERLOAD PROTECTION
SHORT CIRCUIT PROTECTION
OUTPUT TRANSITION SOA PROTECTION
s
s
s
DESCRIPTION
The L7900 series of three-terminal negative
regulators is available in TO-220, TO-220FP,
TO-3 and D
2
PAK 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
TO-220FP
D
2
PAK
TO-3
February 2003
1/16
L7900 SERIES
ABSOLUTE MAXIMUM RATINGS
Symbol
V
I
I
O
P
tot
T
stg
T
op
DC Input Voltage
Output Current
Power Dissipation
Storage Temperature Range
Operating Junction Temperature Range
Parameter²
for V
O
= 5 to 18V
for V
O
= 20, 24V
Value
-35
-40
Internally Limited
Internally Limited
-65 to 150
0 to 150
°C
°C
Unit
V
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
THERMAL DATA
Symbol
R
thj-case
R
thj-amb
Parameter
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Max
Max
D
2
PAK
3
62.5
TO-220
3
50
TO-220FP
5
60
TO-3
4
35
Unit
°C/W
°C/W
CONNECTION DIAGRAM
(top view)
TO-220
TO-220FP
D
2
PAK
TO-3
2/16
L7900 SERIES
ORDERING CODES
TYPE
L7905C
L7952C
L7906C
L7908C
L7912C
L7915C
L7918C
L7920C
L7922C
L7924C
TO-220
L7905CV
L7952CV
L7906CV
L7908CV
L7912CV
L7915CV
L7918CV
L7920CV
L7922CV
L7924CV
D
2
PAK (*)
L7905ACD2T
L7952ACD2T
L7906ACD2T
L7908ACD2T
L7912ACD2T
L7915ACD2T
L7918ACD2T
L7920ACD2T
L7922ACD2T
L7924ACD2T
TO-220FP
L7905CP
L7906CP
L7908CP
L7912CP
L7915CP
L7918CP
L7920CP
L7924CP
TO-3
L7905CT
L7952CT
L7906CT
L7908CT
L7912CT
L7915CT
L7918CT
L7920CT
L7922CT
L7924CT
OUTPUT VOLTAGE
-5 V
-5.2 V
-6 V
-8 V
-12 V
-15 V
-18 V
-20 V
-22 V
-24 V
(*) Available in Tape & Reel with the suffix "-TR".
TEST CIRCUIT
ELECTRICAL CHARACTERISTICS OF L7905C
(refer to the test circuits, T
J
= 0 to 125°C, V
I
= -10V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified).
Symbol
V
O
V
O
∆V
O
(*)
∆V
O
(*)
I
d
∆I
d
Parameter
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
T
J
= 25°C
I
O
= -5 mA to -1 A P
O
≤
15 W
V
I
= 8 to 20 V
V
I
= -7 to -25 V
V
I
= -8 to -12 V
I
O
= 5 mA to 1.5 A
I
O
= 250 to 750 mA
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -8 to -25 V
∆V
O
/∆T Output Voltage Drift
eN
SVR
V
d
I
sc
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Short Circuit Current
I
O
= 5 mA
B = 10Hz to 100KHz
∆V
I
= 10 V
I
O
= 1 A
f = 120Hz
T
J
= 25°C
∆V
O
= 100 mV
T
J
= 25°C
54
-0.4
100
60
1.4
2.1
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
Test Conditions
Min.
-4.8
-4.75
Typ.
-5
-5
Max.
-5.2
-5.25
100
50
100
50
3
0.5
1.3
mV/°C
µV
dB
V
A
mA
mA
mV
Unit
V
V
mV
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
3/16
L7900 SERIES
ELECTRICAL CHARACTERISTICS OF L7952C
(refer to the test circuits, T
J
= 0 to 125°C, V
I
= -10V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified).
Symbol
V
O
V
O
∆V
O
(*)
∆V
O
(*)
I
d
∆I
d
Parameter
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
T
J
= 25°C
I
O
= -5 mA to -1 A P
O
≤
15 W
V
I
= -9 to -21 V
V
I
= -8 to -25 V
V
I
= -9 to -12 V
I
O
= 5 mA to 1.5 A
I
O
= 250 to 750 mA
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -9 to -25 V
∆V
O
/∆T Output Voltage Drift
eN
SVR
V
d
I
sc
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Short Circuit Current
I
O
= 5 mA
B = 10Hz to 100KHz
∆V
I
= 10 V
I
O
= 1 A
f = 120Hz
T
J
= 25°C
∆V
O
= 100 mV
T
J
= 25°C
54
-0.5
125
60
1.4
2
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
Test Conditions
Min.
-5.0
-4.95
Typ.
-5.2
-5.2
Max.
-5.4
-5.45
105
52
105
52
3
0.5
1.3
mV/°C
µV
dB
V
A
mA
mA
mV
Unit
V
V
mV
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
ELECTRICAL CHARACTERISTICS OF L7906C
(refer to the test circuits, T
J
= 0 to 125°C, V
I
= -11V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified).
Symbol
V
O
V
O
∆V
O
(*)
∆V
O
(*)
I
d
∆I
d
Parameter
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
T
J
= 25°C
I
O
= -5 mA to -1 A P
O
≤
15 W
V
I
= -9.5 to -21.5 V
V
I
= -8.5 to -25 V
V
I
= -9 to -15 V
I
O
= 5 mA to 1.5 A
I
O
= 250 to 750 mA
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -9.5 to -25 V
∆V
O
/∆T Output Voltage Drift
eN
SVR
V
d
I
sc
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Short Circuit Current
I
O
= 5 mA
B = 10Hz to 100KHz
∆V
I
= 10 V
I
O
= 1 A
f = 120Hz
T
J
= 25°C
∆V
O
= 100 mV
T
J
= 25°C
54
-0.6
144
60
1.4
2
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
Test Conditions
Min.
-5.75
-5.7
Typ.
-6
-6
Max.
-6.25
-6.3
120
60
120
60
3
0.5
1.3
mV/°C
µV
dB
V
A
mA
mA
mV
Unit
V
V
mV
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
4/16
L7900 SERIES
ELECTRICAL CHARACTERISTICS OF L7908C
(refer to the test circuits, T
J
= 0 to 125°C, V
I
= -14V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified).
Symbol
V
O
V
O
∆V
O
(*)
∆V
O
(*)
I
d
∆I
d
Parameter
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
T
J
= 25°C
I
O
= -5 mA to -1 A P
O
≤
15 W
V
I
= -11.5 to -23 V
V
I
= -10.5 to -25 V
V
I
= -11 to -17 V
I
O
= 5 mA to 1.5 A
I
O
= 250 to 750 mA
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -11.5 to -25 V
∆V
O
/∆T Output Voltage Drift
eN
SVR
V
d
I
sc
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Short Circuit Current
I
O
= 5 mA
B = 10Hz to 100KHz
∆V
I
= 10 V
I
O
= 1 A
f = 120Hz
T
J
= 25°C
∆V
O
= 100 mV
T
J
= 25°C
54
-0.6
175
60
1.1
1.5
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
Test Conditions
Min.
-7.7
-7.6
Typ.
-8
-8
Max.
-8.3
-8.4
160
80
160
80
3
0.5
1
mV/°C
µV
dB
V
A
mA
mA
mV
Unit
V
V
mV
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
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, T
J
= 0 to 125°C, V
I
= -19V,
I
O
= 500 mA, C
I
= 2.2 µF, C
O
= 1 µF unless otherwise specified).
Symbol
V
O
V
O
∆V
O
(*)
∆V
O
(*)
I
d
∆I
d
Parameter
Output Voltage
Output Voltage
Line Regulation
Load Regulation
Quiescent Current
Quiescent Current Change
T
J
= 25°C
I
O
= -5 mA to -1 A P
O
≤
15 W
V
I
= -15.5 to -27 V
V
I
= -14.5 to -30 V
V
I
= -16 to -22 V
I
O
= 5 mA to 1.5 A
I
O
= 250 to 750 mA
T
J
= 25°C
I
O
= 5 mA to 1 A
V
I
= -15 to -30 V
∆V
O
/∆T Output Voltage Drift
eN
SVR
V
d
I
sc
Output Noise Voltage
Supply Voltage Rejection
Dropout Voltage
Short Circuit Current
I
O
= 5 mA
B = 10Hz to 100KHz
∆V
I
= 10 V
I
O
= 1 A
f = 120Hz
T
J
= 25°C
∆V
O
= 100 mV
T
J
= 25°C
54
-0.8
200
60
1.1
1.5
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
T
J
= 25°C
Test Conditions
Min.
-11.5
-11.4
Typ.
-12
-12
Max.
-12.5
-12.6
240
120
240
120
3
0.5
1
mV/°C
µV
dB
V
A
mA
mA
mV
Unit
V
V
mV
(*) Load and line regulation are specified at constant junction temperature. Changes in V
O
due to heating effects must be taken into account
separately. Pulse testing with low duty cycle is used.
5/16
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